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authorNeil Horman <nhorman@tuxdriver.com>2008-07-25 12:44:09 -0400
committerVlad Yasevich <vladislav.yasevich@hp.com>2008-10-01 11:33:06 -0400
commitc226ef9b83694311327f3ab0036c6de9c22e9daf (patch)
tree04c81b4186fd79a1f1b129a8627da6a41ceb4c25 /include/net
parent845b8eda4d783a7ce2670d482a716840a650389e (diff)
sctp: reduce memory footprint of sctp_chunk structure
sctp_chunks should be put on a diet. This is some of the low hanging fruit that we can strip out. Changes all the __s8/__u8 flags to bitfields. Saves 12 bytes per chunk. Signed-off-by: Neil Horman <nhorman@tuxdriver.com> Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>
Diffstat (limited to 'include/net')
-rw-r--r--include/net/sctp/structs.h31
1 files changed, 17 insertions, 14 deletions
diff --git a/include/net/sctp/structs.h b/include/net/sctp/structs.h
index ab1c472ea75..0dc1b7267c3 100644
--- a/include/net/sctp/structs.h
+++ b/include/net/sctp/structs.h
@@ -731,20 +731,23 @@ struct sctp_chunk {
*/
struct sk_buff *auth_chunk;
- __u8 rtt_in_progress; /* Is this chunk used for RTT calculation? */
- __u8 resent; /* Has this chunk ever been retransmitted. */
- __u8 has_tsn; /* Does this chunk have a TSN yet? */
- __u8 has_ssn; /* Does this chunk have a SSN yet? */
- __u8 singleton; /* Was this the only chunk in the packet? */
- __u8 end_of_packet; /* Was this the last chunk in the packet? */
- __u8 ecn_ce_done; /* Have we processed the ECN CE bit? */
- __u8 pdiscard; /* Discard the whole packet now? */
- __u8 tsn_gap_acked; /* Is this chunk acked by a GAP ACK? */
- __s8 fast_retransmit; /* Is this chunk fast retransmitted? */
- __u8 tsn_missing_report; /* Data chunk missing counter. */
- __u8 data_accepted; /* At least 1 chunk in this packet accepted */
- __u8 auth; /* IN: was auth'ed | OUT: needs auth */
- __u8 has_asconf; /* IN: have seen an asconf before */
+#define SCTP_CAN_FRTX 0x0
+#define SCTP_NEED_FRTX 0x1
+#define SCTP_DONT_FRTX 0x2
+ __u16 rtt_in_progress:1, /* This chunk used for RTT calc? */
+ resent:1, /* Has this chunk ever been resent. */
+ has_tsn:1, /* Does this chunk have a TSN yet? */
+ has_ssn:1, /* Does this chunk have a SSN yet? */
+ singleton:1, /* Only chunk in the packet? */
+ end_of_packet:1, /* Last chunk in the packet? */
+ ecn_ce_done:1, /* Have we processed the ECN CE bit? */
+ pdiscard:1, /* Discard the whole packet now? */
+ tsn_gap_acked:1, /* Is this chunk acked by a GAP ACK? */
+ data_accepted:1, /* At least 1 chunk accepted */
+ auth:1, /* IN: was auth'ed | OUT: needs auth */
+ has_asconf:1, /* IN: have seen an asconf before */
+ tsn_missing_report:2, /* Data chunk missing counter. */
+ fast_retransmit:2; /* Is this chunk fast retransmitted? */
};
void sctp_chunk_hold(struct sctp_chunk *);