tree a8a66f054d7c912f3b6b0d10d86d137a203b0ed2
parent 072ab6c68e3dd158b68d97eaff16734474d2f8f8
author Arnaldo Carvalho de Melo <[EMAIL PROTECTED]> Sun, 28 Aug 2005 08:00:28 
-0300
committer David S. Miller <[EMAIL PROTECTED]> Tue, 30 Aug 2005 06:13:17 -0700

[CCID3]: Move ccid3_hc_rx_detect_loss to packet_history.c

Renaming it to dccp_rx_hist_detect_loss.

Signed-off-by: Arnaldo Carvalho de Melo <[EMAIL PROTECTED]>
Signed-off-by: David S. Miller <[EMAIL PROTECTED]>

 net/dccp/ccids/ccid3.c              |   83 +-----------------------------------
 net/dccp/ccids/lib/packet_history.c |   82 +++++++++++++++++++++++++++++++++++
 net/dccp/ccids/lib/packet_history.h |    3 +
 3 files changed, 89 insertions(+), 79 deletions(-)

diff --git a/net/dccp/ccids/ccid3.c b/net/dccp/ccids/ccid3.c
--- a/net/dccp/ccids/ccid3.c
+++ b/net/dccp/ccids/ccid3.c
@@ -927,86 +927,11 @@ static void ccid3_hc_rx_detect_loss(stru
 {
        struct dccp_sock *dp = dccp_sk(sk);
        struct ccid3_hc_rx_sock *hcrx = dp->dccps_hc_rx_ccid_private;
-       struct dccp_rx_hist_entry *entry, *next, *packet;
-       struct dccp_rx_hist_entry *a_loss = NULL;
-       struct dccp_rx_hist_entry *b_loss = NULL;
-       u64 seq_loss = DCCP_MAX_SEQNO + 1;
-       u8 win_loss = 0;
-       u8 num_later = TFRC_RECV_NUM_LATE_LOSS;
-
-       list_for_each_entry_safe(entry, next, &hcrx->ccid3hcrx_hist,
-                                dccphrx_node) {
-               if (num_later == 0) {
-                       b_loss = entry;
-                       break;
-               } else if (dccp_rx_hist_entry_data_packet(entry))
-                       --num_later;
-       }
-
-       if (b_loss == NULL)
-               goto out_update_li;
-
-       num_later = 1;
-
-       list_for_each_entry_safe_continue(entry, next, &hcrx->ccid3hcrx_hist,
-                                         dccphrx_node) {
-               if (num_later == 0) {
-                       a_loss = entry;
-                       break;
-               } else if (dccp_rx_hist_entry_data_packet(entry))
-                       --num_later;
-       }
-
-       if (a_loss == NULL) {
-               if (list_empty(&hcrx->ccid3hcrx_li_hist)) {
-                       /* no loss event have occured yet */
-                       LIMIT_NETDEBUG("%s: TODO: find a lost data packet by "
-                                      "comparing to initial seqno\n",
-                                      dccp_role(sk));
-                       goto out_update_li;
-               } else {
-                       pr_info("%s: %s, sk=%p, ERROR! Less than 4 data "
-                               "packets in history",
-                               __FUNCTION__, dccp_role(sk), sk);
-                       return;
-               }
-       }
-
-       /* Locate a lost data packet */
-       entry = packet = b_loss;
-       list_for_each_entry_safe_continue(entry, next, &hcrx->ccid3hcrx_hist,
-                                         dccphrx_node) {
-               u64 delta = dccp_delta_seqno(entry->dccphrx_seqno,
-                                            packet->dccphrx_seqno);
-
-               if (delta != 0) {
-                       if (dccp_rx_hist_entry_data_packet(packet))
-                               --delta;
-                       /*
-                        * FIXME: check this, probably this % usage is because
-                        * in earlier drafts the ndp count was just 8 bits
-                        * long, but now it cam be up to 24 bits long.
-                        */
-#if 0
-                       if (delta % DCCP_NDP_LIMIT !=
-                           (packet->dccphrx_ndp -
-                            entry->dccphrx_ndp) % DCCP_NDP_LIMIT)
-#endif
-                       if (delta !=
-                            packet->dccphrx_ndp - entry->dccphrx_ndp) {
-                               seq_loss = entry->dccphrx_seqno;
-                               dccp_inc_seqno(&seq_loss);
-                       }
-               }
-               packet = entry;
-               if (packet == a_loss)
-                       break;
-       }
-
-       if (seq_loss != DCCP_MAX_SEQNO + 1)
-               win_loss = a_loss->dccphrx_ccval;
+       u8 win_loss;
+       const u64 seq_loss = dccp_rx_hist_detect_loss(&hcrx->ccid3hcrx_hist,
+                                                     &hcrx->ccid3hcrx_li_hist,
+                                                     &win_loss);
 
-out_update_li:
        ccid3_hc_rx_update_li(sk, seq_loss, win_loss);
 }
 
diff --git a/net/dccp/ccids/lib/packet_history.c 
b/net/dccp/ccids/lib/packet_history.c
--- a/net/dccp/ccids/lib/packet_history.c
+++ b/net/dccp/ccids/lib/packet_history.c
@@ -224,6 +224,88 @@ trim_history:
 
 EXPORT_SYMBOL_GPL(dccp_rx_hist_add_packet);
 
+u64 dccp_rx_hist_detect_loss(struct list_head *rx_list,
+                            struct list_head *li_list, u8 *win_loss)
+{
+       struct dccp_rx_hist_entry *entry, *next, *packet;
+       struct dccp_rx_hist_entry *a_loss = NULL;
+       struct dccp_rx_hist_entry *b_loss = NULL;
+       u64 seq_loss = DCCP_MAX_SEQNO + 1;
+       u8 num_later = TFRC_RECV_NUM_LATE_LOSS;
+
+       list_for_each_entry_safe(entry, next, rx_list, dccphrx_node) {
+               if (num_later == 0) {
+                       b_loss = entry;
+                       break;
+               } else if (dccp_rx_hist_entry_data_packet(entry))
+                       --num_later;
+       }
+
+       if (b_loss == NULL)
+               goto out;
+
+       num_later = 1;
+       list_for_each_entry_safe_continue(entry, next, rx_list, dccphrx_node) {
+               if (num_later == 0) {
+                       a_loss = entry;
+                       break;
+               } else if (dccp_rx_hist_entry_data_packet(entry))
+                       --num_later;
+       }
+
+       if (a_loss == NULL) {
+               if (list_empty(li_list)) {
+                       /* no loss event have occured yet */
+                       LIMIT_NETDEBUG("%s: TODO: find a lost data packet by "
+                                      "comparing to initial seqno\n",
+                                      __FUNCTION__);
+                       goto out;
+               } else {
+                       LIMIT_NETDEBUG("%s: Less than 4 data pkts in history!",
+                                      __FUNCTION__);
+                       goto out;
+               }
+       }
+
+       /* Locate a lost data packet */
+       entry = packet = b_loss;
+       list_for_each_entry_safe_continue(entry, next, rx_list, dccphrx_node) {
+               u64 delta = dccp_delta_seqno(entry->dccphrx_seqno,
+                                            packet->dccphrx_seqno);
+
+               if (delta != 0) {
+                       if (dccp_rx_hist_entry_data_packet(packet))
+                               --delta;
+                       /*
+                        * FIXME: check this, probably this % usage is because
+                        * in earlier drafts the ndp count was just 8 bits
+                        * long, but now it cam be up to 24 bits long.
+                        */
+#if 0
+                       if (delta % DCCP_NDP_LIMIT !=
+                           (packet->dccphrx_ndp -
+                            entry->dccphrx_ndp) % DCCP_NDP_LIMIT)
+#endif
+                       if (delta != packet->dccphrx_ndp - entry->dccphrx_ndp) {
+                               seq_loss = entry->dccphrx_seqno;
+                               dccp_inc_seqno(&seq_loss);
+                       }
+               }
+               packet = entry;
+               if (packet == a_loss)
+                       break;
+       }
+out:
+       if (seq_loss != DCCP_MAX_SEQNO + 1)
+               *win_loss = a_loss->dccphrx_ccval;
+       else
+               *win_loss = 0; /* Paranoia */
+
+       return seq_loss;
+}
+
+EXPORT_SYMBOL_GPL(dccp_rx_hist_detect_loss);
+
 struct dccp_tx_hist *dccp_tx_hist_new(const char *name)
 {
        struct dccp_tx_hist *hist = kmalloc(sizeof(*hist), GFP_ATOMIC);
diff --git a/net/dccp/ccids/lib/packet_history.h 
b/net/dccp/ccids/lib/packet_history.h
--- a/net/dccp/ccids/lib/packet_history.h
+++ b/net/dccp/ccids/lib/packet_history.h
@@ -193,4 +193,7 @@ extern int dccp_rx_hist_add_packet(struc
                                   struct list_head *li_list,
                                   struct dccp_rx_hist_entry *packet);
 
+extern u64 dccp_rx_hist_detect_loss(struct list_head *rx_list,
+                                   struct list_head *li_list, u8 *win_loss);
+
 #endif /* _DCCP_PKT_HIST_ */
-
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