Add support for casefold and product ID to format

Product ID Quotas require wider inodes. For Ext4, quotas and casefolding
are enabled later via tune2fs

Bug: 138322712
Bug: 138321217
Test: Build with and without casefolding and quotas. Verify fs features
Change-Id: I99819f6c38adabcf7a1f944085f9005134e6fc5f

fs_mgr/fs_mgr_format.cpp

@@ -24,6 +24,7 @@
 #include <cutils/partition_utils.h>
 #include <sys/mount.h>
 
+#include <android-base/properties.h>
 #include <android-base/unique_fd.h>
 #include <ext4_utils/ext4.h>
 #include <ext4_utils/ext4_utils.h>
@@ -57,7 +58,7 @@ static int get_dev_sz(const std::string& fs_blkdev, uint64_t* dev_sz) {
 }
 
 static int format_ext4(const std::string& fs_blkdev, const std::string& fs_mnt_point,
-                       bool crypt_footer) {
+                       bool crypt_footer, bool needs_projid) {
     uint64_t dev_sz;
     int rc = 0;
 
@@ -72,11 +73,20 @@ static int format_ext4(const std::string& fs_blkdev, const std::string& fs_mnt_p
     }
 
     std::string size_str = std::to_string(dev_sz / 4096);
-    const char* const mke2fs_args[] = {
-            "/system/bin/mke2fs", "-t",   "ext4", "-b", "4096", fs_blkdev.c_str(),
-            size_str.c_str(),     nullptr};
 
-    rc = logwrap_fork_execvp(arraysize(mke2fs_args), mke2fs_args, nullptr, false, LOG_KLOG, true,
+    std::vector<const char*> mke2fs_args = {"/system/bin/mke2fs", "-t", "ext4", "-b", "4096"};
+
+    // Project ID's require wider inodes. The Quotas themselves are enabled by tune2fs during boot.
+    if (needs_projid) {
+        mke2fs_args.push_back("-I");
+        mke2fs_args.push_back("512");
+    }
+    // casefolding is enabled via tune2fs during boot.
+
+    mke2fs_args.push_back(fs_blkdev.c_str());
+    mke2fs_args.push_back(size_str.c_str());
+
+    rc = logwrap_fork_execvp(mke2fs_args.size(), mke2fs_args.data(), nullptr, false, LOG_KLOG, true,
                              nullptr);
     if (rc) {
         LERROR << "mke2fs returned " << rc;
@@ -95,7 +105,8 @@ static int format_ext4(const std::string& fs_blkdev, const std::string& fs_mnt_p
     return rc;
 }
 
-static int format_f2fs(const std::string& fs_blkdev, uint64_t dev_sz, bool crypt_footer) {
+static int format_f2fs(const std::string& fs_blkdev, uint64_t dev_sz, bool crypt_footer,
+                       bool needs_projid, bool needs_casefold) {
     if (!dev_sz) {
         int rc = get_dev_sz(fs_blkdev, &dev_sz);
         if (rc) {
@@ -109,26 +120,40 @@ static int format_f2fs(const std::string& fs_blkdev, uint64_t dev_sz, bool crypt
     }
 
     std::string size_str = std::to_string(dev_sz / 4096);
-    // clang-format off
-    const char* const args[] = {
-        "/system/bin/make_f2fs",
-        "-g", "android",
-        fs_blkdev.c_str(),
-        size_str.c_str(),
-        nullptr
-    };
-    // clang-format on
 
-    return logwrap_fork_execvp(arraysize(args), args, nullptr, false, LOG_KLOG, true, nullptr);
+    std::vector<const char*> args = {"/system/bin/make_f2fs", "-g", "android"};
+    if (needs_projid) {
+        args.push_back("-O");
+        args.push_back("project_quota,extra_attr");
+    }
+    if (needs_casefold) {
+        args.push_back("-O");
+        args.push_back("casefold");
+        args.push_back("-C");
+        args.push_back("utf8");
+    }
+    args.push_back(fs_blkdev.c_str());
+    args.push_back(size_str.c_str());
+
+    return logwrap_fork_execvp(args.size(), args.data(), nullptr, false, LOG_KLOG, true, nullptr);
 }
 
 int fs_mgr_do_format(const FstabEntry& entry, bool crypt_footer) {
     LERROR << __FUNCTION__ << ": Format " << entry.blk_device << " as '" << entry.fs_type << "'";
 
+    bool needs_casefold = false;
+    bool needs_projid = false;
+
+    if (entry.mount_point == "/data") {
+        needs_casefold = android::base::GetBoolProperty("ro.emulated_storage.casefold", false);
+        needs_projid = android::base::GetBoolProperty("ro.emulated_storage.projid", false);
+    }
+
     if (entry.fs_type == "f2fs") {
-        return format_f2fs(entry.blk_device, entry.length, crypt_footer);
+        return format_f2fs(entry.blk_device, entry.length, crypt_footer, needs_projid,
+                           needs_casefold);
     } else if (entry.fs_type == "ext4") {
-        return format_ext4(entry.blk_device, entry.mount_point, crypt_footer);
+        return format_ext4(entry.blk_device, entry.mount_point, crypt_footer, needs_projid);
     } else {
         LERROR << "File system type '" << entry.fs_type << "' is not supported";
         return -EINVAL;