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sctp: implement renege_events for sctp_stream_interleave

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renege_events is added as a member of sctp_stream_interleave, used to
renege some old data or idata in reasm or lobby queue properly to free
some memory for the new data when there's memory stress.

It defines sctp_renege_events for idata, and leaves sctp_ulpq_renege
as it is for data.

Signed-off-by: Xin Long <lucien.xin@gmail.com>
Acked-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Acked-by: Neil Horman <nhorman@tuxdriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Xin Long
2017-12-08 21:04:06 +08:00
committed by David S. Miller
parent 9162e0ed9e
commit 94014e8d87
5 changed files with 120 additions and 11 deletions
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2
include/net/sctp/stream_interleave.h
View File

@@ -43,6 +43,8 @@ struct sctp_stream_interleave {
struct sctp_chunk *chunk, gfp_t gfp);
int (*enqueue_event)(struct sctp_ulpq *ulpq,
struct sctp_ulpevent *event);
void (*renege_events)(struct sctp_ulpq *ulpq,
struct sctp_chunk *chunk, gfp_t gfp);
};
void sctp_stream_interleave_init(struct sctp_stream *stream);

11
include/net/sctp/ulpqueue.h
View File

@@ -76,11 +76,8 @@ int sctp_clear_pd(struct sock *sk, struct sctp_association *asoc);
void sctp_ulpq_skip(struct sctp_ulpq *ulpq, __u16 sid, __u16 ssn);
void sctp_ulpq_reasm_flushtsn(struct sctp_ulpq *, __u32);
__u16 sctp_ulpq_renege_list(struct sctp_ulpq *ulpq,
struct sk_buff_head *list, __u16 needed);
#endif /* __sctp_ulpqueue_h__ */