Add fsetxattr(), fremovexattr(), open_by_handle_at(), and "virtiofsd demo"

Mostly assorted fixes, a new FDGET operation (get a copy of the
target file descriptor via pidfd_getfd()) and a new "FD" flag that
means we have to do that on direct tag reference.

Signed-off-by: Stefano Brivio <sbrivio@redhat.com>

1 files changed, 5 insertions, 0 deletions

diff --git a/cooker/cooker.h b/cooker/cooker.h
index 05a1f1b..3fc714a 100644
--- a/cooker/cooker.h
+++ b/cooker/cooker.h
@@ -92,6 +92,8 @@ enum type {
 	GNU_DEV_MINOR,
 
 	FDPATH,
+	FDMOUNT,
+
 	UID_T,
 	GID_T,
 
@@ -114,6 +116,9 @@ enum flags {
 	WBUF	= BIT(6),
 
 	IOV	= BIT(7),
+
+	/* Copy file descriptor from target with pidfd_getfd() */
+	FD	= BIT(8),
 };
 
 #define TYPE_COUNT		(TYPE_END - 1)