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Commit 739c905b authored by Alex Elder's avatar Alex Elder Committed by Sage Weil
Browse files

libceph: encapsulate out message data setup 



Move the code that prepares to write the data portion of a message
into its own function.

Signed-off-by: default avatarAlex Elder <elder@inktank.com>
Reviewed-by: default avatarSage Weil <sage@inktank.com>
parent d59315ca

net/ceph/messenger.c

+23 −14
Original line number Diff line number Diff line
@@ -565,6 +565,24 @@ static void con_out_kvec_add(struct ceph_connection *con, 
	con->out_kvec_bytes += size;

}



static void prepare_write_message_data(struct ceph_connection *con)

{

	struct ceph_msg *msg = con->out_msg;



	BUG_ON(!msg);

	BUG_ON(!msg->hdr.data_len);



	/* initialize page iterator */

	con->out_msg_pos.page = 0;

	if (msg->pages)

		con->out_msg_pos.page_pos = msg->page_alignment;

	else

		con->out_msg_pos.page_pos = 0;

	con->out_msg_pos.data_pos = 0;

	con->out_msg_pos.did_page_crc = false;

	con->out_more = 1;  /* data + footer will follow */

}



/*

 * Prepare footer for currently outgoing message, and finish things

 * off.  Assumes out_kvec* are already valid.. we just add on to the end.
@@ -657,26 +675,17 @@ static void prepare_write_message(struct ceph_connection *con) 
		con->out_msg->footer.middle_crc = cpu_to_le32(crc);

	} else

		con->out_msg->footer.middle_crc = 0;

	con->out_msg->footer.data_crc = 0;

	dout("prepare_write_message front_crc %u data_crc %u\n",

	dout("%s front_crc %u middle_crc %u\n", __func__,

	     le32_to_cpu(con->out_msg->footer.front_crc),

	     le32_to_cpu(con->out_msg->footer.middle_crc));



	/* is there a data payload? */

	if (le32_to_cpu(m->hdr.data_len) > 0) {

		/* initialize page iterator */

		con->out_msg_pos.page = 0;

		if (m->pages)

			con->out_msg_pos.page_pos = m->page_alignment;

	con->out_msg->footer.data_crc = 0;

	if (m->hdr.data_len)

		prepare_write_message_data(con);

	else

			con->out_msg_pos.page_pos = 0;

		con->out_msg_pos.data_pos = 0;

		con->out_msg_pos.did_page_crc = false;

		con->out_more = 1;  /* data + footer will follow */

	} else {

		/* no, queue up footer too and be done */

		prepare_write_message_footer(con);

	}



	set_bit(WRITE_PENDING, &con->flags);

}