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Create root directory for supplemental data during user creation

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In order to store supplemental data for apps, we want to create a root
directory at location `/data/misc_ce/<user-id>/supplmental` and
`/data/misc_de/<user-id>supplemental`. These directories will then host
supplemental data for each app based on package name, e.g,
`/data/misc_ce/0/supplemental/<app-name>`.

Since these are sub-directories of misc directory, vold should prepare
them for consistency.

Bug: 217543371
Test: atest SupplementalProcessStorageHostTest
Test: see ag/16681989
Ignore-AOSP-First: Feature is being developed in internal branch
Change-Id: I66ef7a7241c9f82cecedaeb6c9a91f127668300a
Merged-In: I66ef7a7241c9f82cecedaeb6c9a91f127668300a
(cherry picked from commit 0cf90d7ca0)
This commit is contained in:
Samiul Islam 2022-02-11 16:17:49 +00:00
parent 537b76cd98
commit a6f36ae8d0
1 changed files with 12 additions and 2 deletions
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14
vold_prepare_subdirs.cpp
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@ -172,8 +172,13 @@ static bool prepare_subdirs(const std::string& volume_uuid, int user_id, int fla
return false;
}
if (volume_uuid.empty()) {
auto misc_de_path = android::vold::BuildDataMiscDePath(user_id);
if (!prepare_dir_for_user(sehandle, 0771, AID_SYSTEM, AID_SYSTEM,
misc_de_path + "/supplemental", user_id)) {
return false;
}
if (volume_uuid.empty()) {
if (!prepare_dir(sehandle, 0700, 0, 0, misc_de_path + "/vold")) return false;
if (!prepare_dir(sehandle, 0700, 0, 0, misc_de_path + "/storaged")) return false;
if (!prepare_dir(sehandle, 0700, 0, 0, misc_de_path + "/rollback")) return false;
@ -203,8 +208,13 @@ static bool prepare_subdirs(const std::string& volume_uuid, int user_id, int fla
return false;
}
if (volume_uuid.empty()) {
auto misc_ce_path = android::vold::BuildDataMiscCePath(user_id);
if (!prepare_dir_for_user(sehandle, 0771, AID_SYSTEM, AID_SYSTEM,
misc_ce_path + "/supplemental", user_id)) {
return false;
}
if (volume_uuid.empty()) {
if (!prepare_dir(sehandle, 0700, 0, 0, misc_ce_path + "/vold")) return false;
if (!prepare_dir(sehandle, 0700, 0, 0, misc_ce_path + "/storaged")) return false;
if (!prepare_dir(sehandle, 0700, 0, 0, misc_ce_path + "/rollback")) return false;