[Xenomai] [PATCH v2] rtdm: expose user-side file descriptors to drivers

[Xenomai] [PATCH v2] rtdm: expose user-side file descriptors to drivers

[Sebastian Smolorz]

RTDM drivers refer to open files or sockets by using struct rtdm_fd.
Normally, the user-side file descriptors returned by socket() or open()
calls are not necessary for driver operations. However, in some special
cases the user-side fd has to be determined.

Signed-off-by: Sebastian Smolorz <sebastian.smolorz@gmx.de>
---
 include/cobalt/kernel/rtdm/fd.h | 6 ++++++
 kernel/cobalt/rtdm/fd.c         | 1 +
 2 files changed, 7 insertions(+)

diff --git a/include/cobalt/kernel/rtdm/fd.h b/include/cobalt/kernel/rtdm/fd.h
index 58d3c4a..572b17e 100644
--- a/include/cobalt/kernel/rtdm/fd.h
+++ b/include/cobalt/kernel/rtdm/fd.h
@@ -298,6 +298,7 @@ struct rtdm_fd {
 	struct rtdm_fd_ops *ops;
 	struct cobalt_ppd *owner;
 	unsigned int refs;
+	int ufd;
 	int minor;
 	int oflags;
 #ifdef CONFIG_XENO_ARCH_SYS3264
@@ -320,6 +321,11 @@ static inline struct cobalt_ppd *rtdm_fd_owner(const struct rtdm_fd *fd)
 	return fd->owner;
 }
 
+static inline int rtdm_fd_ufd(const struct rtdm_fd *fd)
+{
+	return fd->ufd;
+}
+
 static inline int rtdm_fd_minor(const struct rtdm_fd *fd)
 {
 	return fd->minor;
diff --git a/kernel/cobalt/rtdm/fd.c b/kernel/cobalt/rtdm/fd.c
index 8d577b2..807a11e 100644
--- a/kernel/cobalt/rtdm/fd.c
+++ b/kernel/cobalt/rtdm/fd.c
@@ -166,6 +166,7 @@ int rtdm_fd_enter(struct rtdm_fd *fd, int ufd, unsigned int magic,
 	fd->magic = magic;
 	fd->ops = ops;
 	fd->owner = ppd;
+	fd->ufd = ufd;
 	fd->refs = 1;
 	set_compat_bit(fd);
 
-- 
2.7.4