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Merge "Reland "Only format /data in recovery if user specified a new fstype"" into main am: 5db49a357d

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Original change: https://android-review.googlesource.com/c/platform/bootable/recovery/+/2909199

Change-Id: I1399bb7b5d57507a9fce323fc07f734f14c97bc5
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>
This commit is contained in:
Treehugger Robot 2024-01-13 23:12:38 +00:00 committed by Automerger Merge Worker
commit fdcc28ebf5
1 changed files with 19 additions and 2 deletions
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21
recovery_utils/roots.cpp
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@ -177,8 +177,25 @@ int format_volume(const std::string& volume, const std::string& directory,
}
// If the raw disk will be used as a metadata encrypted device mapper target,
// next boot will first mount this partition as read only, and then unmount,
// call encrypt_inplace.
// next boot will do encrypt_in_place the raw disk. While fs_mgr mounts /data
// as RO to avoid write file operations before encrypt_inplace, this code path
// is not well tested so we would like to avoid it if possible. For safety,
// let vold do the formatting on boot for metadata encrypted devices, except
// when user specified a new fstype. Because init formats /data according
// to fstab, it's difficult to override the fstab in init.
if (!v->metadata_key_dir.empty() && length == 0 && new_fstype.empty()) {
android::base::unique_fd fd(open(v->blk_device.c_str(), O_RDWR));
if (fd == -1) {
PLOG(ERROR) << "format_volume: failed to open " << v->blk_device;
return -1;
}
int64_t device_size = get_file_size(fd.get(), 0);
if (device_size > 0 && !wipe_block_device(fd.get(), device_size)) {
LOG(INFO) << "format_volume: wipe metadata encrypted " << v->blk_device << " with size "
<< device_size;
return 0;
}
}
if ((v->fs_type == "ext4" && new_fstype.empty()) || new_fstype == "ext4") {
LOG(INFO) << "Formatting " << v->blk_device << " as ext4";