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Binder: Add async from to transaction record 

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>
This commit is contained in:
Chuang Zhang 2023-04-24 19:05:15 +08:00 committed by Greg Kroah-Hartman
parent 800936191a
commit c21c0f9a20
2 changed files with 6 additions and 2 deletions
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6
drivers/android/binder.c
View File

@ -3172,6 +3172,8 @@ static void binder_transaction(struct binder_proc *proc,
t->from = thread; t->from = thread;
else else
t->from = NULL; t->from = NULL;
t->from_pid = proc->pid;
t->from_tid = thread->pid;
t->sender_euid = task_euid(proc->tsk); t->sender_euid = task_euid(proc->tsk);
t->to_proc = target_proc; t->to_proc = target_proc;
t->to_thread = target_thread; t->to_thread = target_thread;
@ -5940,8 +5942,8 @@ static void print_binder_transaction_ilocked(struct seq_file *m,
seq_printf(m, seq_printf(m,
"%s %d: %pK from %d:%d to %d:%d code %x flags %x pri %ld r%d elapsed %lldms", "%s %d: %pK from %d:%d to %d:%d code %x flags %x pri %ld r%d elapsed %lldms",
prefix, t->debug_id, t, prefix, t->debug_id, t,
t->from ? t->from->proc->pid : 0, t->from_pid,
t->from ? t->from->pid : 0, t->from_tid,
to_proc ? to_proc->pid : 0, to_proc ? to_proc->pid : 0,
t->to_thread ? t->to_thread->pid : 0, t->to_thread ? t->to_thread->pid : 0,
t->code, t->flags, t->priority, t->need_reply, t->code, t->flags, t->priority, t->need_reply,

2
drivers/android/binder_internal.h
View File

@ -515,6 +515,8 @@ struct binder_transaction {
int debug_id; int debug_id;
struct binder_work work; struct binder_work work;
struct binder_thread *from; struct binder_thread *from;
pid_t from_pid;
pid_t from_tid;
struct binder_transaction *from_parent; struct binder_transaction *from_parent;
struct binder_proc *to_proc; struct binder_proc *to_proc;
struct binder_thread *to_thread; struct binder_thread *to_thread;