ccan/io: rename io_op to io_plan.

This is a better description, since it's I/O we plan to do next.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

19 files changed, 112 insertions, 113 deletions

diff --git a/ccan/io/_info b/ccan/io/_info
index d596b4de..935705f1 100644
--- a/ccan/io/_info
+++ b/ccan/io/_info
@@ -32,11 +32,11 @@
  * };
  *
  * // This reads from stdin.
- * static struct io_op *wake_writer(struct io_conn *, struct stdin_buffer *);
+ * static struct io_plan *wake_writer(struct io_conn *, struct stdin_buffer *);
  * // This writes the stdin buffer to the child.
- * static struct io_op *write_to_child(struct io_conn *c,
- * 				       struct stdin_buffer *b);
- * static struct io_op *read_stdin(struct io_conn *c, struct stdin_buffer *b)
+ * static struct io_plan *write_to_child(struct io_conn *c,
+ *					 struct stdin_buffer *b);
+ * static struct io_plan *read_stdin(struct io_conn *c, struct stdin_buffer *b)
  * {
  * 	assert(c == b->reader);
  * 	b->len = sizeof(b->inbuf);
@@ -44,7 +44,7 @@
  *			       io_next(c, wake_writer, b));
  * }
  *
- * static struct io_op *wake_writer(struct io_conn *c, struct stdin_buffer *b)
+ * static struct io_plan *wake_writer(struct io_conn *c, struct stdin_buffer *b)
  * {
  * 	assert(c == b->reader);
  * 	io_wake(b->writer, write_to_child, b);
@@ -58,15 +58,15 @@
  * 	b->reader = NULL;
  * }
  *
- * static struct io_op *wake_reader(struct io_conn *c, struct stdin_buffer *b)
+ * static struct io_plan *wake_reader(struct io_conn *c, struct stdin_buffer *b)
  * {
  * 	assert(c == b->writer);
  * 	io_wake(b->reader, read_stdin, b);
  * 	return io_idle(c);
  * }
  *
- * static struct io_op *write_to_child(struct io_conn *conn,
- * 				      struct stdin_buffer *b)
+ * static struct io_plan *write_to_child(struct io_conn *conn,
+ * 				        struct stdin_buffer *b)
  * {
  * 	assert(conn == b->writer);
  * 	if (!b->reader)
@@ -74,8 +74,8 @@
  * 	return io_write(b->inbuf, b->len, io_next(conn, wake_reader, b));
  * }
  *
- * static struct io_op *start_writer(struct io_conn *conn,
- * 				     struct stdin_buffer *b)
+ * static struct io_plan *start_writer(struct io_conn *conn,
+ * 				       struct stdin_buffer *b)
  * {
  * 	assert(conn == b->writer);
  * 	return io_idle(conn);
@@ -88,8 +88,8 @@
  * }
  *
  * // This reads from the child and saves it into buffer.
- * static struct io_op *read_from_child(struct io_conn *conn,
- * 				        struct buffer *b)
+ * static struct io_plan *read_from_child(struct io_conn *conn,
+ *					  struct buffer *b)
  * {
  * 	b->off += b->rlen;
  *
diff --git a/ccan/io/backend.h b/ccan/io/backend.h
index a36dee9b..3c5b3f8b 100644
--- a/ccan/io/backend.h
+++ b/ccan/io/backend.h
@@ -9,7 +9,7 @@ struct fd {
 	bool listener;
 	size_t backend_info;
 
-	struct io_op *(*next)(struct io_conn *, void *arg);
+	struct io_plan *(*next)(struct io_conn *, void *arg);
 	void *next_arg;
 
 	void (*finish)(struct io_conn *, void *arg);
@@ -37,7 +37,7 @@ enum io_state {
 	PROCESSING /* We expect them to change this now. */
 };
 
-static inline enum io_state from_ioop(struct io_op *op)
+static inline enum io_state from_ioplan(struct io_plan *op)
 {
 	return (enum io_state)(long)op;
 }
@@ -66,7 +66,7 @@ struct io_timeout {
 	struct timer timer;
 	struct io_conn *conn;
 
-	struct io_op *(*next)(struct io_conn *, void *arg);
+	struct io_plan *(*next)(struct io_conn *, void *arg);
 	void *next_arg;
 };
 
@@ -97,9 +97,9 @@ bool add_listener(struct io_listener *l);
 bool add_conn(struct io_conn *c);
 bool add_duplex(struct io_conn *c);
 void del_listener(struct io_listener *l);
-void backend_set_state(struct io_conn *conn, struct io_op *op);
+void backend_set_state(struct io_conn *conn, struct io_plan *op);
 void backend_add_timeout(struct io_conn *conn, struct timespec ts);
 void backend_del_timeout(struct io_conn *conn);
 
-struct io_op *do_ready(struct io_conn *conn);
+struct io_plan *do_ready(struct io_conn *conn);
 #endif /* CCAN_IO_BACKEND_H */
diff --git a/ccan/io/benchmarks/run-different-speed.c b/ccan/io/benchmarks/run-different-speed.c
index e21b1dd9..cbc9ad6a 100644
--- a/ccan/io/benchmarks/run-different-speed.c
+++ b/ccan/io/benchmarks/run-different-speed.c
@@ -25,21 +25,21 @@ struct client {
 	char reply_buffer[REPLY_SIZE];
 };
 
-static struct io_op *write_reply(struct io_conn *conn, struct client *client);
-static struct io_op *read_request(struct io_conn *conn, struct client *client)
+static struct io_plan *write_reply(struct io_conn *conn, struct client *client);
+static struct io_plan *read_request(struct io_conn *conn, struct client *client)
 {
 	return io_read(client->request_buffer, REQUEST_SIZE,
 		       io_next(conn, write_reply, client));
 }
 
 /* once we're done, loop again. */
-static struct io_op *write_complete(struct io_conn *conn, struct client *client)
+static struct io_plan *write_complete(struct io_conn *conn, struct client *client)
 {
 	completed++;
 	return read_request(conn, client);
 }
 
-static struct io_op *write_reply(struct io_conn *conn, struct client *client)
+static struct io_plan *write_reply(struct io_conn *conn, struct client *client)
 {
 	return io_write(client->reply_buffer, REPLY_SIZE,
 			io_next(conn, write_complete, client));
@@ -106,12 +106,12 @@ static void sigalarm(int sig)
 	write(timeout[1], "1", 1);
 }
 
-static struct io_op *do_timeout(struct io_conn *conn, char *buf)
+static struct io_plan *do_timeout(struct io_conn *conn, char *buf)
 {
 	return io_break(conn, NULL);
 }
 
-static struct io_op *do_timeout_read(struct io_conn *conn, char *buf)
+static struct io_plan *do_timeout_read(struct io_conn *conn, char *buf)
 {
 	return io_read(buf, 1, io_next(conn, do_timeout, buf));
 }
diff --git a/ccan/io/benchmarks/run-length-prefix.c b/ccan/io/benchmarks/run-length-prefix.c
index 7d033634..8a276839 100644
--- a/ccan/io/benchmarks/run-length-prefix.c
+++ b/ccan/io/benchmarks/run-length-prefix.c
@@ -25,28 +25,28 @@ struct client {
 	char *request_buffer;
 };
 
-static struct io_op *write_reply(struct io_conn *conn, struct client *client);
-static struct io_op *read_body(struct io_conn *conn, struct client *client)
+static struct io_plan *write_reply(struct io_conn *conn, struct client *client);
+static struct io_plan *read_body(struct io_conn *conn, struct client *client)
 {
 	assert(client->len <= REQUEST_MAX);
 	return io_read(client->request_buffer, client->len,
 		       io_next(conn, write_reply, client));
 }
 
-static struct io_op *read_header(struct io_conn *conn, struct client *client)
+static struct io_plan *read_header(struct io_conn *conn, struct client *client)
 {
 	return io_read(&client->len, sizeof(client->len),
 		       io_next(conn, read_body, client));
 }
 
 /* once we're done, loop again. */
-static struct io_op *write_complete(struct io_conn *conn, struct client *client)
+static struct io_plan *write_complete(struct io_conn *conn, struct client *client)
 {
 	completed++;
 	return read_header(conn, client);
 }
 
-static struct io_op *write_reply(struct io_conn *conn, struct client *client)
+static struct io_plan *write_reply(struct io_conn *conn, struct client *client)
 {
 	return io_write(&client->len, sizeof(client->len),
 			io_next(conn, write_complete, client));
@@ -112,12 +112,12 @@ static void sigalarm(int sig)
 	write(timeout[1], "1", 1);
 }
 
-static struct io_op *do_timeout(struct io_conn *conn, char *buf)
+static struct io_plan *do_timeout(struct io_conn *conn, char *buf)
 {
 	return io_break(conn, NULL);
 }
 
-static struct io_op *do_timeout_read(struct io_conn *conn, char *buf)
+static struct io_plan *do_timeout_read(struct io_conn *conn, char *buf)
 {
 	return io_read(buf, 1, io_next(conn, do_timeout, buf));
 }
diff --git a/ccan/io/benchmarks/run-loop.c b/ccan/io/benchmarks/run-loop.c
index 9af564c7..7b1aef5a 100644
--- a/ccan/io/benchmarks/run-loop.c
+++ b/ccan/io/benchmarks/run-loop.c
@@ -16,10 +16,10 @@ struct buffer {
 	char buf[32];
 };
 
-static struct io_op *poke_writer(struct io_conn *conn, struct buffer *buf);
-static struct io_op *poke_reader(struct io_conn *conn, struct buffer *buf);
+static struct io_plan *poke_writer(struct io_conn *conn, struct buffer *buf);
+static struct io_plan *poke_reader(struct io_conn *conn, struct buffer *buf);
 
-static struct io_op *do_read(struct io_conn *conn, struct buffer *buf)
+static struct io_plan *do_read(struct io_conn *conn, struct buffer *buf)
 {
 	assert(conn == buf->reader);
 
@@ -27,7 +27,7 @@ static struct io_op *do_read(struct io_conn *conn, struct buffer *buf)
 		       io_next(conn, poke_writer, buf));
 }
 
-static struct io_op *do_write(struct io_conn *conn, struct buffer *buf)
+static struct io_plan *do_write(struct io_conn *conn, struct buffer *buf)
 {
 	assert(conn == buf->writer);
 
@@ -35,7 +35,7 @@ static struct io_op *do_write(struct io_conn *conn, struct buffer *buf)
 			io_next(conn, poke_reader, buf));
 }
 
-static struct io_op *poke_writer(struct io_conn *conn, struct buffer *buf)
+static struct io_plan *poke_writer(struct io_conn *conn, struct buffer *buf)
 {
 	assert(conn == buf->reader);
 
@@ -49,7 +49,7 @@ static struct io_op *poke_writer(struct io_conn *conn, struct buffer *buf)
 	return io_idle(conn);
 }
 
-static struct io_op *poke_reader(struct io_conn *conn, struct buffer *buf)
+static struct io_plan *poke_reader(struct io_conn *conn, struct buffer *buf)
 {
 	assert(conn == buf->writer);
 	/* You read. */
@@ -62,7 +62,7 @@ static struct io_op *poke_reader(struct io_conn *conn, struct buffer *buf)
 	return io_idle(conn);
 }
 
-static struct io_op *reader(struct io_conn *conn, struct buffer *buf)
+static struct io_plan *reader(struct io_conn *conn, struct buffer *buf)
 {
 	assert(conn == buf->reader);
 
diff --git a/ccan/io/io.c b/ccan/io/io.c
index 84c2ccad..210e5587 100644
--- a/ccan/io/io.c
+++ b/ccan/io/io.c
@@ -12,8 +12,8 @@
 void *io_loop_return;
 
 struct io_listener *io_new_listener_(int fd,
-				     struct io_op *(*start)(struct io_conn *,
-							    void *arg),
+				     struct io_plan *(*start)(struct io_conn *,
+							      void *arg),
 				     void (*finish)(struct io_conn *, void *),
 				     void *arg)
 {
@@ -42,7 +42,7 @@ void io_close_listener(struct io_listener *l)
 }
 
 struct io_conn *io_new_conn_(int fd,
-			     struct io_op *(*start)(struct io_conn *, void *),
+			     struct io_plan *(*start)(struct io_conn *, void *),
 			     void (*finish)(struct io_conn *, void *),
 			     void *arg)
 {
@@ -67,7 +67,7 @@ struct io_conn *io_new_conn_(int fd,
 }
 
 struct io_conn *io_duplex_(struct io_conn *old,
-			     struct io_op *(*start)(struct io_conn *, void *),
+			     struct io_plan *(*start)(struct io_conn *, void *),
 			     void (*finish)(struct io_conn *, void *),
 			     void *arg)
 {
@@ -101,9 +101,9 @@ static inline struct io_next *to_ionext(struct io_conn *conn)
 	return (struct io_next *)conn;
 }
 
-static inline struct io_op *to_ioop(enum io_state state)
+static inline struct io_plan *to_ioplan(enum io_state state)
 {
-	return (struct io_op *)(long)state;
+	return (struct io_plan *)(long)state;
 }
 
 static inline struct io_conn *from_ionext(struct io_next *next)
@@ -112,7 +112,7 @@ static inline struct io_conn *from_ionext(struct io_next *next)
 }
 
 struct io_next *io_next_(struct io_conn *conn,
-			 struct io_op *(*next)(struct io_conn *, void *),
+			 struct io_plan *(*next)(struct io_conn *, void *),
 			 void *arg)
 {
 	conn->fd.next = next;
@@ -122,7 +122,7 @@ struct io_next *io_next_(struct io_conn *conn,
 }
 
 bool io_timeout_(struct io_conn *conn, struct timespec ts,
-		 struct io_op *(*next)(struct io_conn *, void *), void *arg)
+		 struct io_plan *(*next)(struct io_conn *, void *), void *arg)
 {
 	if (!conn->timeout) {
 		conn->timeout = malloc(sizeof(*conn->timeout));
@@ -138,48 +138,48 @@ bool io_timeout_(struct io_conn *conn, struct timespec ts,
 }
 
 /* Queue some data to be written. */
-struct io_op *io_write(const void *data, size_t len, struct io_next *next)
+struct io_plan *io_write(const void *data, size_t len, struct io_next *next)
 {
 	struct io_conn *conn = from_ionext(next);
 	conn->u.write.buf = data;
 	conn->u.write.len = len;
-	return to_ioop(WRITE);
+	return to_ioplan(WRITE);
 }
 
 /* Queue a request to read into a buffer. */
-struct io_op *io_read(void *data, size_t len, struct io_next *next)
+struct io_plan *io_read(void *data, size_t len, struct io_next *next)
 {
 	struct io_conn *conn = from_ionext(next);
 	conn->u.read.buf = data;
 	conn->u.read.len = len;
-	return to_ioop(READ);
+	return to_ioplan(READ);
 }
 
 /* Queue a partial request to read into a buffer. */
-struct io_op *io_read_partial(void *data, size_t *len, struct io_next *next)
+struct io_plan *io_read_partial(void *data, size_t *len, struct io_next *next)
 {
 	struct io_conn *conn = from_ionext(next);
 	conn->u.readpart.buf = data;
 	conn->u.readpart.lenp = len;
-	return to_ioop(READPART);
+	return to_ioplan(READPART);
 }
 
 /* Queue a partial write request. */
-struct io_op *io_write_partial(const void *data, size_t *len, struct io_next *next)
+struct io_plan *io_write_partial(const void *data, size_t *len, struct io_next *next)
 {
 	struct io_conn *conn = from_ionext(next);
 	conn->u.writepart.buf = data;
 	conn->u.writepart.lenp = len;
-	return to_ioop(WRITEPART);
+	return to_ioplan(WRITEPART);
 }
 
-struct io_op *io_idle(struct io_conn *conn)
+struct io_plan *io_idle(struct io_conn *conn)
 {
-	return to_ioop(IDLE);
+	return to_ioplan(IDLE);
 }
 
 void io_wake_(struct io_conn *conn,
-	      struct io_op *(*next)(struct io_conn *, void *), void *arg)
+	      struct io_plan *(*next)(struct io_conn *, void *), void *arg)
 
 {
 	/* It might have finished, but we haven't called its finish() yet. */
@@ -188,17 +188,17 @@ void io_wake_(struct io_conn *conn,
 	assert(conn->state == IDLE);
 	conn->fd.next = next;
 	conn->fd.next_arg = arg;
-	backend_set_state(conn, to_ioop(NEXT));
+	backend_set_state(conn, to_ioplan(NEXT));
 }
 
-static struct io_op *do_next(struct io_conn *conn)
+static struct io_plan *do_next(struct io_conn *conn)
 {
 	if (timeout_active(conn))
 		backend_del_timeout(conn);
 	return conn->fd.next(conn, conn->fd.next_arg);
 }
 
-struct io_op *do_ready(struct io_conn *conn)
+struct io_plan *do_ready(struct io_conn *conn)
 {
 	ssize_t ret;
 	bool finished;
@@ -243,20 +243,20 @@ struct io_op *do_ready(struct io_conn *conn)
 
 	if (finished)
 		return do_next(conn);
-	return to_ioop(conn->state);
+	return to_ioplan(conn->state);
 }
 
 /* Useful next functions. */
 /* Close the connection, we're done. */
-struct io_op *io_close(struct io_conn *conn, void *arg)
+struct io_plan *io_close(struct io_conn *conn, void *arg)
 {
-	return to_ioop(FINISHED);
+	return to_ioplan(FINISHED);
 }
 
 /* Exit the loop, returning this (non-NULL) arg. */
-struct io_op *io_break(void *arg, struct io_next *next)
+struct io_plan *io_break(void *arg, struct io_next *next)
 {
 	io_loop_return = arg;
 
-	return to_ioop(NEXT);
+	return to_ioplan(NEXT);
 }
diff --git a/ccan/io/io.h b/ccan/io/io.h
index a481c5f3..629023f9 100644
--- a/ccan/io/io.h
+++ b/ccan/io/io.h
@@ -7,12 +7,11 @@
 #include <unistd.h>
 
 /**
- * struct io_op - pointer to return from io functions.
+ * struct io_plan - pointer to return from a setup function.
  *
- * This undefined structure is just to help the compiler check that you
- * really do return the result of an io-queueing method.
+ * A plan of what IO to do, when.
  */
-struct io_op;
+struct io_plan;
 
 /**
  * struct io_next - pointer to what we're going to do next.
@@ -40,13 +39,13 @@ struct io_next;
  */
 #define io_new_conn(fd, start, finish, arg)				\
 	io_new_conn_((fd),						\
-		     typesafe_cb_preargs(struct io_op *, void *,	\
+		     typesafe_cb_preargs(struct io_plan *, void *,	\
 					 (start), (arg), struct io_conn *), \
 		     typesafe_cb_preargs(void, void *, (finish), (arg),	\
 					 struct io_conn *),		\
 		     (arg))
 struct io_conn *io_new_conn_(int fd,
-			     struct io_op *(*start)(struct io_conn *, void *),
+			     struct io_plan *(*start)(struct io_conn *, void *),
 			     void (*finish)(struct io_conn *, void *),
 			     void *arg);
 
@@ -64,15 +63,15 @@ struct io_conn *io_new_conn_(int fd,
  */
 #define io_new_listener(fd, start, finish, arg)				\
 	io_new_listener_((fd),						\
-			 typesafe_cb_preargs(struct io_op *, void *,	\
+			 typesafe_cb_preargs(struct io_plan *, void *,	\
 					     (start), (arg),		\
 					     struct io_conn *),		\
 			 typesafe_cb_preargs(void, void *, (finish),	\
 					     (arg), struct io_conn *),	\
 			 (arg))
 struct io_listener *io_new_listener_(int fd,
-				     struct io_op *(*start)(struct io_conn *,
-							    void *arg),
+				     struct io_plan *(*start)(struct io_conn *,
+							      void *arg),
 				     void (*finish)(struct io_conn *,
 						    void *arg),
 				     void *arg);
@@ -97,7 +96,7 @@ void io_close_listener(struct io_listener *listener);
  *
  * Note that the I/O may actually be done immediately.
  */
-struct io_op *io_write(const void *data, size_t len, struct io_next *next);
+struct io_plan *io_write(const void *data, size_t len, struct io_next *next);
 
 /**
  * io_read - queue buffer to be read.
@@ -111,7 +110,7 @@ struct io_op *io_write(const void *data, size_t len, struct io_next *next);
  *
  * Note that the I/O may actually be done immediately.
  */
-struct io_op *io_read(void *data, size_t len, struct io_next *next);
+struct io_plan *io_read(void *data, size_t len, struct io_next *next);
 
 /**
  * io_read_partial - queue buffer to be read (partial OK).
@@ -125,7 +124,7 @@ struct io_op *io_read(void *data, size_t len, struct io_next *next);
  *
  * Note that the I/O may actually be done immediately.
  */
-struct io_op *io_read_partial(void *data, size_t *len, struct io_next *next);
+struct io_plan *io_read_partial(void *data, size_t *len, struct io_next *next);
 
 /**
  * io_write_partial - queue data to be written (partial OK).
@@ -139,7 +138,7 @@ struct io_op *io_read_partial(void *data, size_t *len, struct io_next *next);
  *
  * Note that the I/O may actually be done immediately.
  */
-struct io_op *io_write_partial(const void *data, size_t *len,
+struct io_plan *io_write_partial(const void *data, size_t *len,
 			       struct io_next *next);
 
 /**
@@ -150,7 +149,7 @@ struct io_op *io_write_partial(const void *data, size_t *len,
  * later call io_read/io_write etc. (or io_close) on it, in which case
  * it will do that.
  */
-struct io_op *io_idle(struct io_conn *conn);
+struct io_plan *io_idle(struct io_conn *conn);
 
 /**
  * io_timeout - set timeout function if the callback doesn't fire.
@@ -168,13 +167,13 @@ struct io_op *io_idle(struct io_conn *conn);
  */
 #define io_timeout(conn, ts, next, arg) \
 	io_timeout_((conn), (ts),					\
-		    typesafe_cb_preargs(struct io_op *, void *,		\
+		    typesafe_cb_preargs(struct io_plan *, void *,	\
 					(next), (arg),			\
 					struct io_conn *),		\
 		    (arg))
 
 bool io_timeout_(struct io_conn *conn, struct timespec ts,
-		 struct io_op *(*next)(struct io_conn *, void *), void *arg);
+		 struct io_plan *(*next)(struct io_conn *, void *), void *arg);
 
 /**
  * io_duplex - split an fd into two connections.
@@ -192,14 +191,14 @@ bool io_timeout_(struct io_conn *conn, struct timespec ts,
  */
 #define io_duplex(conn, start, finish, arg)				\
 	io_duplex_((conn),						\
-		   typesafe_cb_preargs(struct io_op *, void *,		\
+		   typesafe_cb_preargs(struct io_plan *, void *,	\
 				       (start), (arg), struct io_conn *), \
 		   typesafe_cb_preargs(void, void *, (finish), (arg),	\
 				       struct io_conn *),		\
 		   (arg))
 
 struct io_conn *io_duplex_(struct io_conn *conn,
-			   struct io_op *(*start)(struct io_conn *, void *),
+			   struct io_plan *(*start)(struct io_conn *, void *),
 			   void (*finish)(struct io_conn *, void *),
 			   void *arg);
 
@@ -214,11 +213,11 @@ struct io_conn *io_duplex_(struct io_conn *conn,
  */
 #define io_wake(conn, next, arg)					\
 	io_wake_((conn),						\
-		 typesafe_cb_preargs(struct io_op *, void *,		\
+		 typesafe_cb_preargs(struct io_plan *, void *,		\
 				     (next), (arg), struct io_conn *),	\
 		 (arg))
 void io_wake_(struct io_conn *conn,
-	      struct io_op *(*next)(struct io_conn *, void *), void *arg);
+	      struct io_plan *(*next)(struct io_conn *, void *), void *arg);
 
 /**
  * io_break - return from io_loop()
@@ -231,7 +230,7 @@ void io_wake_(struct io_conn *conn,
  *
  * If io_loop() is called again, then @next will be called.
  */
-struct io_op *io_break(void *arg, struct io_next *next);
+struct io_plan *io_break(void *arg, struct io_next *next);
 
 /**
  * io_next - indicate what callback to call next.
@@ -249,11 +248,11 @@ struct io_op *io_break(void *arg, struct io_next *next);
  */
 #define io_next(conn, next, arg)					\
 	io_next_((conn),						\
-		 typesafe_cb_preargs(struct io_op *, void *,		\
+		 typesafe_cb_preargs(struct io_plan *, void *,		\
 				     (next), (arg), struct io_conn *),	\
 		 (arg))
 struct io_next *io_next_(struct io_conn *conn,
-			 struct io_op *(*next)(struct io_conn *, void *arg),
+			 struct io_plan *(*next)(struct io_conn *, void *arg),
 			 void *arg);
 
 /* FIXME: io_recvfrom/io_sendto */
@@ -269,7 +268,7 @@ struct io_next *io_next_(struct io_conn *conn,
  * It's common to 'return io_close(...)' from a @next function, but
  * io_close can also be used as an argument to io_next().
  */
-struct io_op *io_close(struct io_conn *, void *unused);
+struct io_plan *io_close(struct io_conn *, void *unused);
 
 /**
  * io_loop - process fds until all closed on io_break.
diff --git a/ccan/io/poll.c b/ccan/io/poll.c
index 94536728..9cef3ce3 100644
--- a/ccan/io/poll.c
+++ b/ccan/io/poll.c
@@ -126,9 +126,9 @@ static int pollmask(enum io_state state)
 	}
 }
 
-void backend_set_state(struct io_conn *conn, struct io_op *op)
+void backend_set_state(struct io_conn *conn, struct io_plan *plan)
 {
-	enum io_state state = from_ioop(op);
+	enum io_state state = from_ioplan(plan);
 	struct pollfd *pfd = &pollfds[conn->fd.backend_info];
 
 	if (pfd->events)
diff --git a/ccan/io/test/run-01-start-finish.c b/ccan/io/test/run-01-start-finish.c
index 03a1e328..837a1269 100644
--- a/ccan/io/test/run-01-start-finish.c
+++ b/ccan/io/test/run-01-start-finish.c
@@ -6,7 +6,7 @@
 #include <sys/wait.h>
 #include <stdio.h>
 
-static struct io_op *start_ok(struct io_conn *conn, int *state)
+static struct io_plan *start_ok(struct io_conn *conn, int *state)
 {
 	ok1(*state == 0);
 	(*state)++;
diff --git a/ccan/io/test/run-02-read.c b/ccan/io/test/run-02-read.c
index e59ccb38..3f376fe6 100644
--- a/ccan/io/test/run-02-read.c
+++ b/ccan/io/test/run-02-read.c
@@ -11,7 +11,7 @@ struct data {
 	char buf[4];
 };
 
-static struct io_op *start_ok(struct io_conn *conn, struct data *d)
+static struct io_plan *start_ok(struct io_conn *conn, struct data *d)
 {
 	ok1(d->state == 0);
 	d->state++;
diff --git a/ccan/io/test/run-03-readpartial.c b/ccan/io/test/run-03-readpartial.c
index cc1857c5..4898eb80 100644
--- a/ccan/io/test/run-03-readpartial.c
+++ b/ccan/io/test/run-03-readpartial.c
@@ -12,7 +12,7 @@ struct data {
 	char buf[4];
 };
 
-static struct io_op *start_ok(struct io_conn *conn, struct data *d)
+static struct io_plan *start_ok(struct io_conn *conn, struct data *d)
 {
 	ok1(d->state == 0);
 	d->state++;
diff --git a/ccan/io/test/run-04-writepartial.c b/ccan/io/test/run-04-writepartial.c
index daa81e7c..ae0b462c 100644
--- a/ccan/io/test/run-04-writepartial.c
+++ b/ccan/io/test/run-04-writepartial.c
@@ -12,7 +12,7 @@ struct data {
 	char *buf;
 };
 
-static struct io_op *start_ok(struct io_conn *conn, struct data *d)
+static struct io_plan *start_ok(struct io_conn *conn, struct data *d)
 {
 	ok1(d->state == 0);
 	d->state++;
diff --git a/ccan/io/test/run-05-write.c b/ccan/io/test/run-05-write.c
index 83c8c4ca..0e1c4a5e 100644
--- a/ccan/io/test/run-05-write.c
+++ b/ccan/io/test/run-05-write.c
@@ -12,7 +12,7 @@ struct data {
 	char *buf;
 };
 
-static struct io_op *start_ok(struct io_conn *conn, struct data *d)
+static struct io_plan *start_ok(struct io_conn *conn, struct data *d)
 {
 	ok1(d->state == 0);
 	d->state++;
diff --git a/ccan/io/test/run-06-idle.c b/ccan/io/test/run-06-idle.c
index e6144dee..efe052b4 100644
--- a/ccan/io/test/run-06-idle.c
+++ b/ccan/io/test/run-06-idle.c
@@ -16,14 +16,14 @@ struct data {
 	char buf[4];
 };
 
-static struct io_op *do_read(struct io_conn *conn, struct data *d)
+static struct io_plan *do_read(struct io_conn *conn, struct data *d)
 {
 	ok1(d->state == 2 || d->state == 3);
 	d->state++;
 	return io_read(d->buf, sizeof(d->buf), io_next(conn, io_close, d));
 }
 
-static struct io_op *start_waker(struct io_conn *conn, struct data *d)
+static struct io_plan *start_waker(struct io_conn *conn, struct data *d)
 {
 	ok1(d->state == 1);
 	d->state++;
@@ -38,7 +38,7 @@ static void finish_waker(struct io_conn *conn, struct data *d)
 	d->state++;
 }
 
-static struct io_op *start_idle(struct io_conn *conn, struct data *d)
+static struct io_plan *start_idle(struct io_conn *conn, struct data *d)
 {
 	int fd;
 
diff --git a/ccan/io/test/run-07-break.c b/ccan/io/test/run-07-break.c
index cf3d251a..7e9824d5 100644
--- a/ccan/io/test/run-07-break.c
+++ b/ccan/io/test/run-07-break.c
@@ -11,14 +11,14 @@ struct data {
 	char buf[4];
 };
 
-static struct io_op *do_read(struct io_conn *conn, struct data *d)
+static struct io_plan *do_read(struct io_conn *conn, struct data *d)
 {
 	ok1(d->state == 1);
 	d->state++;
 	return io_read(d->buf, sizeof(d->buf), io_next(conn, io_close, d));
 }
 
-static struct io_op *start_break(struct io_conn *conn, struct data *d)
+static struct io_plan *start_break(struct io_conn *conn, struct data *d)
 {
 	ok1(d->state == 0);
 	d->state++;
diff --git a/ccan/io/test/run-10-many.c b/ccan/io/test/run-10-many.c
index 6a972ba8..63c53963 100644
--- a/ccan/io/test/run-10-many.c
+++ b/ccan/io/test/run-10-many.c
@@ -15,10 +15,10 @@ struct buffer {
 	char buf[32];
 };
 
-static struct io_op *poke_writer(struct io_conn *conn, struct buffer *buf);
-static struct io_op *poke_reader(struct io_conn *conn, struct buffer *buf);
+static struct io_plan *poke_writer(struct io_conn *conn, struct buffer *buf);
+static struct io_plan *poke_reader(struct io_conn *conn, struct buffer *buf);
 
-static struct io_op *do_read(struct io_conn *conn, struct buffer *buf)
+static struct io_plan *do_read(struct io_conn *conn, struct buffer *buf)
 {
 	assert(conn == buf->reader);
 
@@ -26,7 +26,7 @@ static struct io_op *do_read(struct io_conn *conn, struct buffer *buf)
 		       io_next(conn, poke_writer, buf));
 }
 
-static struct io_op *do_write(struct io_conn *conn, struct buffer *buf)
+static struct io_plan *do_write(struct io_conn *conn, struct buffer *buf)
 {
 	assert(conn == buf->writer);
 
@@ -34,7 +34,7 @@ static struct io_op *do_write(struct io_conn *conn, struct buffer *buf)
 			io_next(conn, poke_reader, buf));
 }
 
-static struct io_op *poke_writer(struct io_conn *conn, struct buffer *buf)
+static struct io_plan *poke_writer(struct io_conn *conn, struct buffer *buf)
 {
 	assert(conn == buf->reader);
 
@@ -48,7 +48,7 @@ static struct io_op *poke_writer(struct io_conn *conn, struct buffer *buf)
 	return io_idle(conn);
 }
 
-static struct io_op *poke_reader(struct io_conn *conn, struct buffer *buf)
+static struct io_plan *poke_reader(struct io_conn *conn, struct buffer *buf)
 {
 	assert(conn == buf->writer);
 	/* You read. */
@@ -61,7 +61,7 @@ static struct io_op *poke_reader(struct io_conn *conn, struct buffer *buf)
 	return io_idle(conn);
 }
 
-static struct io_op *reader(struct io_conn *conn, struct buffer *buf)
+static struct io_plan *reader(struct io_conn *conn, struct buffer *buf)
 {
 	assert(conn == buf->reader);
 
diff --git a/ccan/io/test/run-12-bidir.c b/ccan/io/test/run-12-bidir.c
index f9cf4e59..3e769beb 100644
--- a/ccan/io/test/run-12-bidir.c
+++ b/ccan/io/test/run-12-bidir.c
@@ -18,13 +18,13 @@ static void finish_ok(struct io_conn *conn, struct data *d)
 	d->state++;
 }
 
-static struct io_op *write_out(struct io_conn *conn, struct data *d)
+static struct io_plan *write_out(struct io_conn *conn, struct data *d)
 {
 	d->state++;
 	return io_write(d->wbuf, sizeof(d->wbuf), io_next(conn, io_close, d));
 }
 
-static struct io_op *start_ok(struct io_conn *conn, struct data *d)
+static struct io_plan *start_ok(struct io_conn *conn, struct data *d)
 {
 	ok1(d->state == 0);
 	d->state++;
diff --git a/ccan/io/test/run-13-all-idle.c b/ccan/io/test/run-13-all-idle.c
index b6a52a55..48be71dd 100644
--- a/ccan/io/test/run-13-all-idle.c
+++ b/ccan/io/test/run-13-all-idle.c
@@ -7,7 +7,7 @@
 #include <stdio.h>
 #include <signal.h>
 
-static struct io_op *start(struct io_conn *conn, void *unused)
+static struct io_plan *start(struct io_conn *conn, void *unused)
 {
 	return io_idle(conn);
 }
diff --git a/ccan/io/test/run-15-timeout.c b/ccan/io/test/run-15-timeout.c
index b5e0dc3f..e8897c95 100644
--- a/ccan/io/test/run-15-timeout.c
+++ b/ccan/io/test/run-15-timeout.c
@@ -15,14 +15,14 @@ struct data {
 };
 
 
-static struct io_op *no_timeout(struct io_conn *conn, struct data *d)
+static struct io_plan *no_timeout(struct io_conn *conn, struct data *d)
 {
 	ok1(d->state == 1);
 	d->state++;
 	return io_close(conn, d);
 }
 
-static struct io_op *timeout(struct io_conn *conn, struct data *d)
+static struct io_plan *timeout(struct io_conn *conn, struct data *d)
 {
 	ok1(d->state == 1);
 	d->state++;
@@ -30,7 +30,7 @@ static struct io_op *timeout(struct io_conn *conn, struct data *d)
 	return io_close(conn, d);
 }
 
-static struct io_op *start_ok(struct io_conn *conn, struct data *d)
+static struct io_plan *start_ok(struct io_conn *conn, struct data *d)
 {
 	ok1(d->state == 0);
 	d->state++;