diff options
Diffstat (limited to 'net/sctp/stream_interleave.c')
| -rw-r--r-- | net/sctp/stream_interleave.c | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/net/sctp/stream_interleave.c b/net/sctp/stream_interleave.c index cc4a5e320145..f62771ccaf5d 100644 --- a/net/sctp/stream_interleave.c +++ b/net/sctp/stream_interleave.c @@ -1193,6 +1193,52 @@ static bool sctp_validate_iftsn(struct sctp_chunk *chunk) return true; } +static void sctp_report_fwdtsn(struct sctp_ulpq *ulpq, __u32 ftsn) +{ + /* Move the Cumulattive TSN Ack ahead. */ + sctp_tsnmap_skip(&ulpq->asoc->peer.tsn_map, ftsn); + /* purge the fragmentation queue */ + sctp_ulpq_reasm_flushtsn(ulpq, ftsn); + /* Abort any in progress partial delivery. */ + sctp_ulpq_abort_pd(ulpq, GFP_ATOMIC); +} + +static void sctp_intl_reasm_flushtsn(struct sctp_ulpq *ulpq, __u32 ftsn) +{ + struct sk_buff *pos, *tmp; + + skb_queue_walk_safe(&ulpq->reasm, pos, tmp) { + struct sctp_ulpevent *event = sctp_skb2event(pos); + __u32 tsn = event->tsn; + + if (TSN_lte(tsn, ftsn)) { + __skb_unlink(pos, &ulpq->reasm); + sctp_ulpevent_free(event); + } + } + + skb_queue_walk_safe(&ulpq->reasm_uo, pos, tmp) { + struct sctp_ulpevent *event = sctp_skb2event(pos); + __u32 tsn = event->tsn; + + if (TSN_lte(tsn, ftsn)) { + __skb_unlink(pos, &ulpq->reasm_uo); + sctp_ulpevent_free(event); + } + } +} + +static void sctp_report_iftsn(struct sctp_ulpq *ulpq, __u32 ftsn) +{ + /* Move the Cumulattive TSN Ack ahead. */ + sctp_tsnmap_skip(&ulpq->asoc->peer.tsn_map, ftsn); + /* purge the fragmentation queue */ + sctp_intl_reasm_flushtsn(ulpq, ftsn); + /* abort only when it's for all data */ + if (ftsn == sctp_tsnmap_get_max_tsn_seen(&ulpq->asoc->peer.tsn_map)) + sctp_intl_abort_pd(ulpq, GFP_ATOMIC); +} + static struct sctp_stream_interleave sctp_stream_interleave_0 = { .data_chunk_len = sizeof(struct sctp_data_chunk), .ftsn_chunk_len = sizeof(struct sctp_fwdtsn_chunk), @@ -1208,6 +1254,7 @@ static struct sctp_stream_interleave sctp_stream_interleave_0 = { /* FORWARD-TSN process functions */ .generate_ftsn = sctp_generate_fwdtsn, .validate_ftsn = sctp_validate_fwdtsn, + .report_ftsn = sctp_report_fwdtsn, }; static struct sctp_stream_interleave sctp_stream_interleave_1 = { @@ -1225,6 +1272,7 @@ static struct sctp_stream_interleave sctp_stream_interleave_1 = { /* I-FORWARD-TSN process functions */ .generate_ftsn = sctp_generate_iftsn, .validate_ftsn = sctp_validate_iftsn, + .report_ftsn = sctp_report_iftsn, }; void sctp_stream_interleave_init(struct sctp_stream *stream) |