diff options
Diffstat (limited to 'drivers/android')
| -rw-r--r-- | drivers/android/binder.c | 58 | ||||
| -rw-r--r-- | drivers/android/binder_internal.h | 2 |
2 files changed, 48 insertions, 12 deletions
diff --git a/drivers/android/binder.c b/drivers/android/binder.c index 49b08c04fa09..26382e982c5e 100644 --- a/drivers/android/binder.c +++ b/drivers/android/binder.c @@ -1852,6 +1852,7 @@ static void binder_deferred_fd_close(int fd) } static void binder_transaction_buffer_release(struct binder_proc *proc, + struct binder_thread *thread, struct binder_buffer *buffer, binder_size_t failed_at, bool is_failure) @@ -2011,8 +2012,16 @@ static void binder_transaction_buffer_release(struct binder_proc *proc, &proc->alloc, &fd, buffer, offset, sizeof(fd)); WARN_ON(err); - if (!err) + if (!err) { binder_deferred_fd_close(fd); + /* + * Need to make sure the thread goes + * back to userspace to complete the + * deferred close + */ + if (thread) + thread->looper_need_return = true; + } } } break; default: @@ -3029,9 +3038,8 @@ static void binder_transaction(struct binder_proc *proc, if (reply) { binder_enqueue_thread_work(thread, tcomplete); binder_inner_proc_lock(target_proc); - if (target_thread->is_dead || target_proc->is_frozen) { - return_error = target_thread->is_dead ? - BR_DEAD_REPLY : BR_FROZEN_REPLY; + if (target_thread->is_dead) { + return_error = BR_DEAD_REPLY; binder_inner_proc_unlock(target_proc); goto err_dead_proc_or_thread; } @@ -3096,7 +3104,7 @@ err_bad_parent: err_copy_data_failed: binder_free_txn_fixups(t); trace_binder_transaction_failed_buffer_release(t->buffer); - binder_transaction_buffer_release(target_proc, t->buffer, + binder_transaction_buffer_release(target_proc, NULL, t->buffer, buffer_offset, true); if (target_node) binder_dec_node_tmpref(target_node); @@ -3175,7 +3183,9 @@ err_invalid_target_handle: * Cleanup buffer and free it. */ static void -binder_free_buf(struct binder_proc *proc, struct binder_buffer *buffer) +binder_free_buf(struct binder_proc *proc, + struct binder_thread *thread, + struct binder_buffer *buffer) { binder_inner_proc_lock(proc); if (buffer->transaction) { @@ -3203,7 +3213,7 @@ binder_free_buf(struct binder_proc *proc, struct binder_buffer *buffer) binder_node_inner_unlock(buf_node); } trace_binder_transaction_buffer_release(buffer); - binder_transaction_buffer_release(proc, buffer, 0, false); + binder_transaction_buffer_release(proc, thread, buffer, 0, false); binder_alloc_free_buf(&proc->alloc, buffer); } @@ -3405,7 +3415,7 @@ static int binder_thread_write(struct binder_proc *proc, proc->pid, thread->pid, (u64)data_ptr, buffer->debug_id, buffer->transaction ? "active" : "finished"); - binder_free_buf(proc, buffer); + binder_free_buf(proc, thread, buffer); break; } @@ -4098,7 +4108,7 @@ retry: buffer->transaction = NULL; binder_cleanup_transaction(t, "fd fixups failed", BR_FAILED_REPLY); - binder_free_buf(proc, buffer); + binder_free_buf(proc, thread, buffer); binder_debug(BINDER_DEBUG_FAILED_TRANSACTION, "%d:%d %stransaction %d fd fixups failed %d/%d, line %d\n", proc->pid, thread->pid, @@ -4640,6 +4650,22 @@ static int binder_ioctl_get_node_debug_info(struct binder_proc *proc, return 0; } +static bool binder_txns_pending_ilocked(struct binder_proc *proc) +{ + struct rb_node *n; + struct binder_thread *thread; + + if (proc->outstanding_txns > 0) + return true; + + for (n = rb_first(&proc->threads); n; n = rb_next(n)) { + thread = rb_entry(n, struct binder_thread, rb_node); + if (thread->transaction_stack) + return true; + } + return false; +} + static int binder_ioctl_freeze(struct binder_freeze_info *info, struct binder_proc *target_proc) { @@ -4671,8 +4697,13 @@ static int binder_ioctl_freeze(struct binder_freeze_info *info, (!target_proc->outstanding_txns), msecs_to_jiffies(info->timeout_ms)); - if (!ret && target_proc->outstanding_txns) - ret = -EAGAIN; + /* Check pending transactions that wait for reply */ + if (ret >= 0) { + binder_inner_proc_lock(target_proc); + if (binder_txns_pending_ilocked(target_proc)) + ret = -EAGAIN; + binder_inner_proc_unlock(target_proc); + } if (ret < 0) { binder_inner_proc_lock(target_proc); @@ -4688,6 +4719,7 @@ static int binder_ioctl_get_freezer_info( { struct binder_proc *target_proc; bool found = false; + __u32 txns_pending; info->sync_recv = 0; info->async_recv = 0; @@ -4697,7 +4729,9 @@ static int binder_ioctl_get_freezer_info( if (target_proc->pid == info->pid) { found = true; binder_inner_proc_lock(target_proc); - info->sync_recv |= target_proc->sync_recv; + txns_pending = binder_txns_pending_ilocked(target_proc); + info->sync_recv |= target_proc->sync_recv | + (txns_pending << 1); info->async_recv |= target_proc->async_recv; binder_inner_proc_unlock(target_proc); } diff --git a/drivers/android/binder_internal.h b/drivers/android/binder_internal.h index e7d4920b3368..d6b6b8cb7346 100644 --- a/drivers/android/binder_internal.h +++ b/drivers/android/binder_internal.h @@ -381,6 +381,8 @@ struct binder_ref { * binder transactions * (protected by @inner_lock) * @sync_recv: process received sync transactions since last frozen + * bit 0: received sync transaction after being frozen + * bit 1: new pending sync transaction during freezing * (protected by @inner_lock) * @async_recv: process received async transactions since last frozen * (protected by @inner_lock) |