This reverts "Merge branch 'dccp' of git://eden-feed.erg.abdn.ac.uk/dccp_exp"
as it accentally contained the wrong set of patches. These will be
submitted separately.
Signed-off-by: Gerrit Renker <gerrit@erg.abdn.ac.uk>
diff --git a/net/dccp/ccids/ccid3.h b/net/dccp/ccids/ccid3.h
index af6e1bf..49ca32b 100644
--- a/net/dccp/ccids/ccid3.h
+++ b/net/dccp/ccids/ccid3.h
@@ -47,22 +47,11 @@
/* Two seconds as per RFC 3448 4.2 */
#define TFRC_INITIAL_TIMEOUT (2 * USEC_PER_SEC)
-/* Maximum backoff interval t_mbi (RFC 3448, 4.3) */
-#define TFRC_T_MBI (64 * USEC_PER_SEC)
+/* In usecs - half the scheduling granularity as per RFC3448 4.6 */
+#define TFRC_OPSYS_HALF_TIME_GRAN (USEC_PER_SEC / (2 * HZ))
-/*
- * The t_delta parameter (RFC 3448, 4.6): delays of less than %USEC_PER_MSEC are
- * rounded down to 0, since sk_reset_timer() here uses millisecond granularity.
- * Hence we can use a constant t_delta = %USEC_PER_MSEC when HZ >= 500. A coarse
- * resolution of HZ < 500 means that the error is below one timer tick (t_gran)
- * when using the constant t_delta = t_gran / 2 = %USEC_PER_SEC / (2 * HZ).
- */
-#if (HZ >= 500)
-# define TFRC_T_DELTA USEC_PER_MSEC
-#else
-# define TFRC_T_DELTA (USEC_PER_SEC / (2 * HZ))
-#warning Coarse CONFIG_HZ resolution -- higher value recommended for TFRC.
-#endif
+/* Parameter t_mbi from [RFC 3448, 4.3]: backoff interval in seconds */
+#define TFRC_T_MBI 64
enum ccid3_options {
TFRC_OPT_LOSS_EVENT_RATE = 192,
@@ -70,43 +59,62 @@
TFRC_OPT_RECEIVE_RATE = 194,
};
+struct ccid3_options_received {
+ u64 ccid3or_seqno:48,
+ ccid3or_loss_intervals_idx:16;
+ u16 ccid3or_loss_intervals_len;
+ u32 ccid3or_loss_event_rate;
+ u32 ccid3or_receive_rate;
+};
+
+/* TFRC sender states */
+enum ccid3_hc_tx_states {
+ TFRC_SSTATE_NO_SENT = 1,
+ TFRC_SSTATE_NO_FBACK,
+ TFRC_SSTATE_FBACK,
+ TFRC_SSTATE_TERM,
+};
+
/** struct ccid3_hc_tx_sock - CCID3 sender half-connection socket
*
- * @x - Current sending rate in 64 * bytes per second
- * @x_recv - Receive rate in 64 * bytes per second
- * @x_calc - Calculated rate in bytes per second
- * @rtt - Estimate of current round trip time in usecs
- * @r_sqmean - Estimate of long-term RTT (RFC 3448, 4.5)
- * @p - Current loss event rate (0-1) scaled by 1000000
- * @s - Packet size in bytes
- * @t_rto - Nofeedback Timer setting in usecs
- * @t_ipi - Interpacket (send) interval (RFC 3448, 4.6) in usecs
- * @feedback - Whether feedback has been received or not
- * @last_win_count - Last window counter sent
- * @t_last_win_count - Timestamp of earliest packet with
- * last_win_count value sent
- * @no_feedback_timer - Handle to no feedback timer
- * @t_ld - Time last doubled during slow start
- * @t_nom - Nominal send time of next packet
- * @hist - Packet history
+ * @ccid3hctx_x - Current sending rate in 64 * bytes per second
+ * @ccid3hctx_x_recv - Receive rate in 64 * bytes per second
+ * @ccid3hctx_x_calc - Calculated rate in bytes per second
+ * @ccid3hctx_rtt - Estimate of current round trip time in usecs
+ * @ccid3hctx_p - Current loss event rate (0-1) scaled by 1000000
+ * @ccid3hctx_s - Packet size in bytes
+ * @ccid3hctx_t_rto - Nofeedback Timer setting in usecs
+ * @ccid3hctx_t_ipi - Interpacket (send) interval (RFC 3448, 4.6) in usecs
+ * @ccid3hctx_state - Sender state, one of %ccid3_hc_tx_states
+ * @ccid3hctx_last_win_count - Last window counter sent
+ * @ccid3hctx_t_last_win_count - Timestamp of earliest packet
+ * with last_win_count value sent
+ * @ccid3hctx_no_feedback_timer - Handle to no feedback timer
+ * @ccid3hctx_t_ld - Time last doubled during slow start
+ * @ccid3hctx_t_nom - Nominal send time of next packet
+ * @ccid3hctx_delta - Send timer delta (RFC 3448, 4.6) in usecs
+ * @ccid3hctx_hist - Packet history
+ * @ccid3hctx_options_received - Parsed set of retrieved options
*/
struct ccid3_hc_tx_sock {
- u64 x;
- u64 x_recv;
- u32 x_calc;
- u32 rtt;
- u16 r_sqmean;
- u32 p;
- u32 t_rto;
- u32 t_ipi;
- u16 s;
- bool feedback:1;
- u8 last_win_count;
- ktime_t t_last_win_count;
- struct timer_list no_feedback_timer;
- ktime_t t_ld;
- ktime_t t_nom;
- struct tfrc_tx_hist_entry *hist;
+ struct tfrc_tx_info ccid3hctx_tfrc;
+#define ccid3hctx_x ccid3hctx_tfrc.tfrctx_x
+#define ccid3hctx_x_recv ccid3hctx_tfrc.tfrctx_x_recv
+#define ccid3hctx_x_calc ccid3hctx_tfrc.tfrctx_x_calc
+#define ccid3hctx_rtt ccid3hctx_tfrc.tfrctx_rtt
+#define ccid3hctx_p ccid3hctx_tfrc.tfrctx_p
+#define ccid3hctx_t_rto ccid3hctx_tfrc.tfrctx_rto
+#define ccid3hctx_t_ipi ccid3hctx_tfrc.tfrctx_ipi
+ u16 ccid3hctx_s;
+ enum ccid3_hc_tx_states ccid3hctx_state:8;
+ u8 ccid3hctx_last_win_count;
+ ktime_t ccid3hctx_t_last_win_count;
+ struct timer_list ccid3hctx_no_feedback_timer;
+ ktime_t ccid3hctx_t_ld;
+ ktime_t ccid3hctx_t_nom;
+ u32 ccid3hctx_delta;
+ struct tfrc_tx_hist_entry *ccid3hctx_hist;
+ struct ccid3_options_received ccid3hctx_options_received;
};
static inline struct ccid3_hc_tx_sock *ccid3_hc_tx_sk(const struct sock *sk)
@@ -116,32 +124,41 @@
return hctx;
}
-
-enum ccid3_fback_type {
- CCID3_FBACK_NONE = 0,
- CCID3_FBACK_INITIAL,
- CCID3_FBACK_PERIODIC,
- CCID3_FBACK_PARAM_CHANGE
+/* TFRC receiver states */
+enum ccid3_hc_rx_states {
+ TFRC_RSTATE_NO_DATA = 1,
+ TFRC_RSTATE_DATA,
+ TFRC_RSTATE_TERM = 127,
};
/** struct ccid3_hc_rx_sock - CCID3 receiver half-connection socket
*
- * @last_counter - Tracks window counter (RFC 4342, 8.1)
- * @feedback - The type of the feedback last sent
- * @x_recv - Receiver estimate of send rate (RFC 3448, sec. 4.3)
- * @tstamp_last_feedback - Time at which last feedback was sent
- * @hist - Packet history (loss detection + RTT sampling)
- * @li_hist - Loss Interval database
- * @p_inverse - Inverse of Loss Event Rate (RFC 4342, sec. 8.5)
+ * @ccid3hcrx_x_recv - Receiver estimate of send rate (RFC 3448 4.3)
+ * @ccid3hcrx_rtt - Receiver estimate of rtt (non-standard)
+ * @ccid3hcrx_p - Current loss event rate (RFC 3448 5.4)
+ * @ccid3hcrx_last_counter - Tracks window counter (RFC 4342, 8.1)
+ * @ccid3hcrx_state - Receiver state, one of %ccid3_hc_rx_states
+ * @ccid3hcrx_bytes_recv - Total sum of DCCP payload bytes
+ * @ccid3hcrx_x_recv - Receiver estimate of send rate (RFC 3448, sec. 4.3)
+ * @ccid3hcrx_rtt - Receiver estimate of RTT
+ * @ccid3hcrx_tstamp_last_feedback - Time at which last feedback was sent
+ * @ccid3hcrx_tstamp_last_ack - Time at which last feedback was sent
+ * @ccid3hcrx_hist - Packet history (loss detection + RTT sampling)
+ * @ccid3hcrx_li_hist - Loss Interval database
+ * @ccid3hcrx_s - Received packet size in bytes
+ * @ccid3hcrx_pinv - Inverse of Loss Event Rate (RFC 4342, sec. 8.5)
*/
struct ccid3_hc_rx_sock {
- u8 last_counter:4;
- enum ccid3_fback_type feedback:4;
- u32 x_recv;
- ktime_t tstamp_last_feedback;
- struct tfrc_rx_hist hist;
- struct tfrc_loss_hist li_hist;
-#define p_inverse li_hist.i_mean
+ u8 ccid3hcrx_last_counter:4;
+ enum ccid3_hc_rx_states ccid3hcrx_state:8;
+ u32 ccid3hcrx_bytes_recv;
+ u32 ccid3hcrx_x_recv;
+ u32 ccid3hcrx_rtt;
+ ktime_t ccid3hcrx_tstamp_last_feedback;
+ struct tfrc_rx_hist ccid3hcrx_hist;
+ struct tfrc_loss_hist ccid3hcrx_li_hist;
+ u16 ccid3hcrx_s;
+#define ccid3hcrx_pinv ccid3hcrx_li_hist.i_mean
};
static inline struct ccid3_hc_rx_sock *ccid3_hc_rx_sk(const struct sock *sk)