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sctp: Save some room in the sctp_transport by using bitfields 

Saves some room in the sctp_transport structure.

Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>
This commit is contained in:
Vlad Yasevich 2010-04-30 22:41:09 -04:00
parent d9efc2231b
commit c0058a35aa
1 changed files with 27 additions and 22 deletions
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49
include/net/sctp/structs.h
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@ -877,7 +877,33 @@ struct sctp_transport {
/* Reference counting. */
atomic_t refcnt;
int dead;
int dead:1,
/* RTO-Pending : A flag used to track if one of the DATA
* chunks sent to this address is currently being
* used to compute a RTT. If this flag is 0,
* the next DATA chunk sent to this destination
* should be used to compute a RTT and this flag
* should be set. Every time the RTT
* calculation completes (i.e. the DATA chunk
* is SACK'd) clear this flag.
*/
rto_pending:1,
/*
* hb_sent : a flag that signals that we have a pending
* heartbeat.
*/
hb_sent:1,
/* Flag to track the current fast recovery state */
fast_recovery:1,
/* Is the Path MTU update pending on this tranport */
pmtu_pending:1,
/* Is this structure kfree()able? */
malloced:1;
/* This is the peer's IP address and port. */
union sctp_addr ipaddr;
@ -907,22 +933,6 @@ struct sctp_transport {
/* SRTT : The current smoothed round trip time. */
__u32 srtt;
/* RTO-Pending : A flag used to track if one of the DATA
* chunks sent to this address is currently being
* used to compute a RTT. If this flag is 0,
* the next DATA chunk sent to this destination
* should be used to compute a RTT and this flag
* should be set. Every time the RTT
* calculation completes (i.e. the DATA chunk
* is SACK'd) clear this flag.
* hb_sent : a flag that signals that we have a pending heartbeat.
*/
__u8 rto_pending;
__u8 hb_sent;
/* Flag to track the current fast recovery state */
__u8 fast_recovery;
/*
* These are the congestion stats.
*/
@ -975,9 +985,6 @@ struct sctp_transport {
*/
__u16 pathmaxrxt;
/* is the Path MTU update pending on this tranport */
__u8 pmtu_pending;
/* PMTU : The current known path MTU. */
__u32 pathmtu;
@ -1021,8 +1028,6 @@ struct sctp_transport {
/* This is the list of transports that have chunks to send. */
struct list_head send_ready;
int malloced; /* Is this structure kfree()able? */
/* State information saved for SFR_CACC algorithm. The key
* idea in SFR_CACC is to maintain state at the sender on a
* per-destination basis when a changeover happens.