ANDROID: rust_binder: use tgid_nr_ns for getting pid

Because we are backporting commit e0020ba6cbcb ("rust: add
PidNamespace"), it is neccesary to update Rust Binder to use the new
tgid_nr_ns() method for getting the task's pid, as that commit deleted
pid_in_current_ns().

Bug: 429146594
Change-Id: I3acd7e3f1fee2957d5663208614667220e09dfd5
Signed-off-by: Alice Ryhl <aliceryhl@google.com>

drivers/android/binder/node.rs

@@ -723,7 +723,7 @@ impl Node {
         if len == inner.freeze_list.len() {
             pr_warn!(
                 "Could not remove freeze listener for {}\n",
-                p.task.pid_in_current_ns()
+                p.pid_in_current_ns()
             );
         }
         if inner.freeze_list.is_empty() {

drivers/android/binder/process.rs

@@ -511,9 +511,13 @@ impl Process {
         Ok(process)
     }
 
+    pub(crate) fn pid_in_current_ns(&self) -> kernel::task::Pid {
+        self.task.tgid_nr_ns(None)
+    }
+
     #[inline(never)]
     pub(crate) fn debug_print_stats(&self, m: &SeqFile, ctx: &Context) -> Result<()> {
-        seq_print!(m, "proc {}\n", self.task.pid_in_current_ns());
+        seq_print!(m, "proc {}\n", self.pid_in_current_ns());
         seq_print!(m, "context {}\n", &*ctx.name);
 
         let inner = self.inner.lock();
@@ -561,7 +565,7 @@ impl Process {
 
     #[inline(never)]
     pub(crate) fn debug_print(&self, m: &SeqFile, ctx: &Context, print_all: bool) -> Result<()> {
-        seq_print!(m, "proc {}\n", self.task.pid_in_current_ns());
+        seq_print!(m, "proc {}\n", self.pid_in_current_ns());
         seq_print!(m, "context {}\n", &*ctx.name);
 
         let mut all_threads = KVec::new();

drivers/android/binder/thread.rs

@@ -1299,7 +1299,7 @@ impl Thread {
                 pr_warn!(
                     "Transaction failed: {:?} my_pid:{}",
                     err,
-                    self.process.task.pid_in_current_ns()
+                    self.process.pid_in_current_ns()
                 );
             }
 
@@ -1584,7 +1584,7 @@ impl Thread {
                 pr_warn!(
                     "Write failure {:?} in pid:{}",
                     err,
-                    self.process.task.pid_in_current_ns()
+                    self.process.pid_in_current_ns()
                 );
                 req.read_consumed = 0;
                 writer.write(&req)?;
@@ -1601,7 +1601,7 @@ impl Thread {
                 pr_warn!(
                     "Read failure {:?} in pid:{}",
                     ret,
-                    self.process.task.pid_in_current_ns()
+                    self.process.pid_in_current_ns()
                 );
             }
         }

drivers/android/binder/transaction.rs

@@ -429,7 +429,7 @@ impl DeliverToRead for Transaction {
         tr.sender_pid = 0;
         if self.target_node.is_some() && self.flags & TF_ONE_WAY == 0 {
             // Not a reply and not one-way.
-            tr.sender_pid = self.from.process.task.pid_in_current_ns();
+            tr.sender_pid = self.from.process.pid_in_current_ns();
         }
         let code = if self.target_node.is_none() {
             BR_REPLY