sctp: introduce stream scheduler foundations

[mirror_ubuntu-bionic-kernel.git] / include / net / sctp / structs.h

diff --git a/include/net/sctp/structs.h b/include/net/sctp/structs.h
index c48f7999fe9b80c5b5e41910a3608059b94140a7..3c22a30fd71b4ef87419a77cf69b00807a5986bb 100644 (file)
--- a/include/net/sctp/structs.h
+++ b/include/net/sctp/structs.h
@@ -84,7 +84,6 @@ struct sctp_ulpq;
 struct sctp_ep_common;
 struct crypto_shash;
 struct sctp_stream;
-struct sctp_stream_out;
 
 
 #include <net/sctp/tsnmap.h>
@@ -531,8 +530,12 @@ struct sctp_chunk {
        /* How many times this chunk have been sent, for prsctp RTX policy */
        int sent_count;
 
-       /* This is our link to the per-transport transmitted list.  */
-       struct list_head transmitted_list;
+       union {
+               /* This is our link to the per-transport transmitted list.  */
+               struct list_head transmitted_list;
+               /* List in specific stream outq */
+               struct list_head stream_list;
+       };
 
        /* This field is used by chunks that hold fragmented data.
         * For the first fragment this is the list that holds the rest of
@@ -1019,6 +1022,9 @@ struct sctp_outq {
        /* Data pending that has never been transmitted.  */
        struct list_head out_chunk_list;
 
+       /* Stream scheduler being used */
+       struct sctp_sched_ops *sched;
+
        unsigned int out_qlen;  /* Total length of queued data chunks. */
 
        /* Error of send failed, may used in SCTP_SEND_FAILED event. */
@@ -1325,6 +1331,7 @@ struct sctp_inithdr_host {
 struct sctp_stream_out_ext {
        __u64 abandoned_unsent[SCTP_PR_INDEX(MAX) + 1];
        __u64 abandoned_sent[SCTP_PR_INDEX(MAX) + 1];
+       struct list_head outq; /* chunks enqueued by this stream */
 };
 
 struct sctp_stream_out {
@@ -1342,6 +1349,8 @@ struct sctp_stream {
        struct sctp_stream_in *in;
        __u16 outcnt;
        __u16 incnt;
+       /* Current stream being sent, if any */
+       struct sctp_stream_out *out_curr;
 };
 
 #define SCTP_STREAM_CLOSED             0x00