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FROMGIT: Binder: Add async from to transaction record

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This commit adds support for getting the pid and tid information of
the sender for asynchronous transfers in binderfs transfer records.
In previous versions, it was not possible to obtain this information
from the transfer records. While this information may not be necessary
for all use cases, it can be useful in some scenarios.

Signed-off-by: Chuang Zhang <zhangchuang3@xiaomi.com>
Acked-by: Carlos Llamas <cmllamas@google.com>
Link: https://lore.kernel.org/r/0c1e8bd37c68dd1518bb737b06b768cde9659386.1682333709.git.zhangchuang3@xiaomi.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Bug: 235773151
(cherry picked from commit c21c0f9a20a963f5a1874657a4e3d657503f7815
 git: //git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc.git
 char-misc-next)
Change-Id: I7e729853353522164c4a3dd1094145dfd19af961
Signed-off-by: Carlos Llamas <cmllamas@google.com>
This commit is contained in:
Chuang Zhang 2023-04-24 19:05:15 +08:00 committed by Carlos Llamas
parent f00a145958
commit 5d26262b76
2 changed files with 6 additions and 2 deletions
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6
drivers/android/binder.c
View File

@ -3385,6 +3385,8 @@ static void binder_transaction(struct binder_proc *proc,
t->from = thread;
else
t->from = NULL;
t->from_pid = proc->pid;
t->from_tid = thread->pid;
t->sender_euid = task_euid(proc->tsk);
t->to_proc = target_proc;
t->to_thread = target_thread;
@ -6190,8 +6192,8 @@ static void print_binder_transaction_ilocked(struct seq_file *m,
seq_printf(m,
"%s %d: %pK from %d:%d to %d:%d code %x flags %x pri %d:%d r%d elapsed %lldms",
prefix, t->debug_id, t,
t->from ? t->from->proc->pid : 0,
t->from ? t->from->pid : 0,
t->from_pid,
t->from_tid,
to_proc ? to_proc->pid : 0,
t->to_thread ? t->to_thread->pid : 0,
t->code, t->flags, t->priority.sched_policy,

2
drivers/android/binder_internal.h
View File

@ -552,6 +552,8 @@ struct binder_transaction {
int debug_id;
struct binder_work work;
struct binder_thread *from;
pid_t from_pid;
pid_t from_tid;
struct binder_transaction *from_parent;
struct binder_proc *to_proc;
struct binder_thread *to_thread;