From: Andre Noll <maan@systemlinux.org>
Date: Mon, 9 Mar 2009 20:55:50 +0000 (+0100)
Subject: vss: Improve EOF handling.
X-Git-Tag: v0.3.4~44
X-Git-Url: http://git.tuebingen.mpg.de/?a=commitdiff_plain;h=95fe1cebd7a254296312e7c0e6fcdecd0613cfc5;p=paraslash.git

vss: Improve EOF handling.

Set the "next" flag only if no more writes to fec clients happen.
---

diff --git a/vss.c b/vss.c
index aa76ca2e..79c09ba7 100644
--- a/vss.c
+++ b/vss.c
@@ -781,7 +781,7 @@ err:
  */
 static void vss_send(struct vss_task *vsst)
 {
-	int i;
+	int i, sent_something = 0;
 	struct timeval due;
 	struct fec_client *fc, *tmp_fc;
 
@@ -792,8 +792,22 @@ static void vss_send(struct vss_task *vsst)
 	if (chk_barrier("data send", &vsst->data_send_barrier,
 			&due, 1) < 0)
 		return;
+	list_for_each_entry_safe(fc, tmp_fc, &fec_client_list, node) {
+		if (!next_slice_is_due(fc, NULL))
+			continue;
+		if (compute_next_fec_slice(fc, vsst) <= 0)
+			continue;
+		PARA_DEBUG_LOG("sending %d:%d (%u bytes)\n", fc->group.num,
+			fc->current_slice_num, fc->fcp->max_slice_bytes);
+		fc->fcp->send((char *)fc->enc_buf,
+			fc->fcp->max_slice_bytes,
+			fc->fcp->private_data);
+		fc->current_slice_num++;
+		sent_something = 1;
+	}
 	if (mmd->current_chunk >= mmd->afd.afhi.chunks_total) { /* eof */
-		mmd->new_vss_status_flags |= VSS_NEXT;
+		if (!sent_something)
+			mmd->new_vss_status_flags |= VSS_NEXT;
 		return;
 	}
 	compute_chunk_time(mmd->chunks_sent, &mmd->afd.afhi.chunk_tv,
@@ -825,18 +839,6 @@ static void vss_send(struct vss_task *vsst)
 		mmd->chunks_sent++;
 		mmd->current_chunk++;
 	}
-	list_for_each_entry_safe(fc, tmp_fc, &fec_client_list, node) {
-		if (!next_slice_is_due(fc, NULL))
-			continue;
-		if (compute_next_fec_slice(fc, vsst) <= 0)
-			continue;
-		PARA_DEBUG_LOG("sending %d:%d (%u bytes)\n", fc->group.num,
-			fc->current_slice_num, fc->fcp->max_slice_bytes);
-		fc->fcp->send((char *)fc->enc_buf,
-			fc->fcp->max_slice_bytes,
-			fc->fcp->private_data);
-		fc->current_slice_num++;
-	}
 }
 
 static void vss_post_select(struct sched *s, struct task *t)