[4/6] fs: move filp_close() outside of __close_fd_get_file()

Commit Message

Jens Axboe Jan. 7, 2020, 5 p.m. UTC

Just one caller of this, and just use filp_close() there manually.
This is important to allow async close/removal of the fd.

Signed-off-by: Jens Axboe <[e-mail]>
---
 drivers/android/binder.c | 6 ++++--
 fs/file.c                | 6 ++++--
 2 files changed, 8 insertions(+), 4 deletions(-)

Patch

diff --git a/drivers/android/binder.c b/drivers/android/binder.c
index b2dad43dbf82..cf72ca250a08 100644
--- a/drivers/android/binder.c
+++ b/drivers/android/binder.c
@@ -2249,10 +2249,12 @@  static void binder_deferred_fd_close(int fd)
 		return;
 	init_task_work(&twcb->twork, binder_do_fd_close);
 	__close_fd_get_file(fd, &twcb->file);
-	if (twcb->file)
+	if (twcb->file) {
+		filp_close(twcb->file, current->files);
 		task_work_add(current, &twcb->twork, true);
-	else
+	} else {
 		kfree(twcb);
+	}
 }
 
 static void binder_transaction_buffer_release(struct binder_proc *proc,
diff --git a/fs/file.c b/fs/file.c
index 3da91a112bab..fb7081bfac2b 100644
--- a/fs/file.c
+++ b/fs/file.c
@@ -642,7 +642,9 @@  int __close_fd(struct files_struct *files, unsigned fd)
 EXPORT_SYMBOL(__close_fd); /* for ksys_close() */
 
 /*
- * variant of __close_fd that gets a ref on the file for later fput
+ * variant of __close_fd that gets a ref on the file for later fput.
+ * The caller must ensure that filp_close() called on the file, and then
+ * an fput().
  */
 int __close_fd_get_file(unsigned int fd, struct file **res)
 {
@@ -662,7 +664,7 @@  int __close_fd_get_file(unsigned int fd, struct file **res)
 	spin_unlock(&files->file_lock);
 	get_file(file);
 	*res = file;
-	return filp_close(file, files);
+	return 0;
 
 out_unlock:
 	spin_unlock(&files->file_lock);