On Tue, Aug 3, 2021 at 3:46 PM Jason Wang [off-list ref] wrote:

在 2021/7/29 下午3:34, Xie Yongji 写道:

quoted

Export receive_fd() so that some modules can use
it to pass file descriptor between processes without
missing any security stuffs.

Signed-off-by: Xie Yongji <redacted>
---
  fs/file.c            | 6 ++++++
  include/linux/file.h | 7 +++----
  2 files changed, 9 insertions(+), 4 deletions(-)

diff --git a/fs/file.c b/fs/file.c
index 86dc9956af32..210e540672aa 100644
--- a/fs/file.c
+++ b/fs/file.c

@@ -1134,6 +1134,12 @@ int receive_fd_replace(int new_fd, struct file *file, unsigned int o_flags)
      return new_fd;
  }

+int receive_fd(struct file *file, unsigned int o_flags)
+{
+     return __receive_fd(file, NULL, o_flags);

Any reason that receive_fd_user() can live in the file.h?

Since no modules use it.

Thanks,
Yongji