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, 6 insertions, 2 deletions

diff --git a/cooker/emit.h b/cooker/emit.h
index 5557187..abdeda9 100644
--- a/cooker/emit.h
+++ b/cooker/emit.h
@@ -8,6 +8,9 @@
 
 void emit_nr(struct gluten_ctx *g, struct gluten_offset number);
 void emit_fd(struct gluten_ctx *g, struct fd_desc *desc);
+struct gluten_offset emit_fdget(struct gluten_ctx *g,
+				struct gluten_offset src,
+				struct gluten_offset dst);
 void emit_call(struct gluten_ctx *g, struct context_desc *cdesc, long nr,
 	       unsigned count, bool is_ptr[6],
 	       struct gluten_offset offset[6], struct gluten_offset ret_offset);
@@ -38,8 +41,9 @@ void emit_copy(struct gluten_ctx *g,
 	       struct gluten_offset dst, struct gluten_offset src, size_t size);
 void emit_copy_field(struct gluten_ctx *g, struct field *field,
 		     struct gluten_offset dst, struct gluten_offset src);
-void emit_resolvefd(struct gluten_ctx *g, struct gluten_offset fd,
-                     struct gluten_offset path, size_t path_size);
+void emit_resolvefd(struct gluten_ctx *g, enum type type,
+		    struct gluten_offset fd,
+		    struct gluten_offset path, size_t path_size);
 void emit_end(struct gluten_ctx *g);
 struct gluten_offset emit_data(struct gluten_ctx *g, enum type type,
 			       size_t str_len, union value *value);