libfuse: clean up fuse_chan

Clean up fuse_chan related interfaces.  Remove the following from the
lowlevel library API:

struct fuse_chan_ops;
fuse_chan_new();
fuse_chan_session();
fuse_chan_recv();
fuse_chan_send();

1 files changed, 82 insertions, 0 deletions

diff --git a/lib/fuse_i.h b/lib/fuse_i.h
index c205fa8..245e175 100644
--- a/lib/fuse_i.h
+++ b/lib/fuse_i.h
@@ -12,6 +12,44 @@
 struct fuse_chan;
 struct fuse_ll;
 
+/**
+ * Channel operations
+ *
+ * This is used in channel creation
+ */
+struct fuse_chan_ops {
+	/**
+	 * Hook for receiving a raw request
+	 *
+	 * @param ch pointer to the channel
+	 * @param buf the buffer to store the request in
+	 * @param size the size of the buffer
+	 * @return the actual size of the raw request, or -1 on error
+	 */
+	int (*receive)(struct fuse_chan **chp, char *buf, size_t size);
+
+	/**
+	 * Hook for sending a raw reply
+	 *
+	 * A return value of -ENOENT means, that the request was
+	 * interrupted, and the reply was discarded
+	 *
+	 * @param ch the channel
+	 * @param iov vector of blocks
+	 * @param count the number of blocks in vector
+	 * @return zero on success, -errno on failure
+	 */
+	int (*send)(struct fuse_chan *ch, const struct iovec iov[],
+		    size_t count);
+
+	/**
+	 * Destroy the channel
+	 *
+	 * @param ch the channel
+	 */
+	void (*destroy)(struct fuse_chan *ch);
+};
+
 struct fuse_session {
 	int (*receive_buf)(struct fuse_session *se, struct fuse_buf *buf,
 			   struct fuse_chan **chp);
@@ -111,6 +149,50 @@ struct fuse_session *fuse_session_new(void *data);
  */
 void *fuse_session_data(struct fuse_session *se);
 
+/**
+ * Create a new channel
+ *
+ * @param op channel operations
+ * @param fd file descriptor of the channel
+ * @param bufsize the minimal receive buffer size
+ * @return the new channel object, or NULL on failure
+ */
+struct fuse_chan *fuse_chan_new(struct fuse_chan_ops *op, int fd,
+                               size_t bufsize);
+
+/**
+ * Query the session to which this channel is assigned
+ *
+ * @param ch the channel
+ * @return the session, or NULL if the channel is not assigned
+ */
+struct fuse_session *fuse_chan_session(struct fuse_chan *ch);
+
+/**
+ * Send a raw reply
+ *
+ * A return value of -ENOENT means, that the request was
+ * interrupted, and the reply was discarded
+ *
+ * @param ch the channel
+ * @param iov vector of blocks
+ * @param count the number of blocks in vector
+ * @return zero on success, -errno on failure
+ */
+int fuse_chan_send(struct fuse_chan *ch, const struct iovec iov[],
+		   size_t count);
+
+/**
+ * Receive a raw request
+ *
+ * A return value of -ENODEV means, that the filesystem was unmounted
+ *
+ * @param ch pointer to the channel
+ * @param buf the buffer to store the request in
+ * @param size the size of the buffer
+ * @return the actual size of the raw request, or -errno on error
+ */
+int fuse_chan_recv(struct fuse_chan **ch, char *buf, size_t size);
 
 void fuse_kern_unmount(const char *mountpoint, int fd);
 int fuse_kern_mount(const char *mountpoint, struct fuse_args *args);