init: fix to set sd device label correctly for FS

The sysfs node of sd blk_device is /sys/fs/f2fs/sd-<num>, we shouldn't
skip partition number at this time.

Bug: 189257443
Test: access sd-<num> sysfs correctly
Signed-off-by: Guo Weichao <guoweichao@oppo.com>
Signed-off-by: Huang Jianan <huangjianan@oppo.com>
Change-Id: Ibcd7bb265f8fca9cd26f8770403f1bafad433acb

Author: weichao-guo

init/mount_handler.cpp

@@ -90,12 +90,18 @@ void SetMountProperty(const MountHandlerEntry& entry, bool add) {
     auto mount_prop = entry.mount_point;
     if (mount_prop == "/") mount_prop = "/root";
     std::replace(mount_prop.begin(), mount_prop.end(), '/', '.');
-    mount_prop = "dev.mnt.blk" + mount_prop;
+    auto blk_mount_prop = "dev.mnt.blk" + mount_prop;
+    auto dev_mount_prop = "dev.mnt.dev" + mount_prop;
     // Set property even if its value does not change to trigger 'on property:'
     // handling, except for clearing non-existent or already clear property.
     // Goal is reduction of empty properties and associated triggers.
-    if (value.empty() && android::base::GetProperty(mount_prop, "").empty()) return;
-    android::base::SetProperty(mount_prop, value);
+    if (value.empty() && android::base::GetProperty(blk_mount_prop, "").empty()) return;
+    android::base::SetProperty(blk_mount_prop, value);
+    if (!value.empty()) {
+        android::base::SetProperty(dev_mount_prop, entry.blk_device.substr(strlen(devblock)));
+    } else {
+        android::base::SetProperty(dev_mount_prop, "");
+    }
 }
 
 }  // namespace

rootdir/init.rc

@@ -1024,11 +1024,11 @@ on boot
 
     # to access F2FS sysfs on dm-<num> directly
     mkdir /dev/sys/fs/by-name 0755 system system
-    symlink /sys/fs/f2fs/${dev.mnt.blk.data} /dev/sys/fs/by-name/userdata
+    symlink /sys/fs/f2fs/${dev.mnt.dev.data} /dev/sys/fs/by-name/userdata
 
     # to access dm-<num> sysfs
     mkdir /dev/sys/block/by-name 0755 system system
-    symlink /sys/devices/virtual/block/${dev.mnt.blk.data} /dev/sys/block/by-name/userdata
+    symlink /sys/devices/virtual/block/${dev.mnt.dev.data} /dev/sys/block/by-name/userdata
 
     # F2FS tuning. Set cp_interval larger than dirty_expire_centisecs, 30 secs,
     # to avoid power consumption when system becomes mostly idle. Be careful