[sheepdog] [PATCH v1 2/3] sheep/http: add variable 'data_len' for o_extent[]

[Robin Dong]

From: Robin Dong <sanbai at taobao.com>

Since users could use append-operation to add 1MB data each times, the
'start' and 'count' in o_extent[] is not enough to describe the exact
length of data stored in o_extent (each o_extent may store only 1MB
data, which is small than SD_DATA_OBJ_SIZE).

Therefore we add variable 'data_len' in o_extent[] to identify the
length of data.

Signed-off-by: Robin Dong <sanbai at taobao.com>
---
 sheep/http/kv.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/sheep/http/kv.c b/sheep/http/kv.c
index 07196ab..7326614 100644
--- a/sheep/http/kv.c
+++ b/sheep/http/kv.c
@@ -28,6 +28,7 @@ struct kv_bnode {
 struct onode_extent {
 	uint64_t start;
 	uint64_t count;
+	uint64_t data_len;
 };
 
 /*
@@ -709,6 +710,7 @@ static int onode_allocate_extents(struct kv_onode *onode,
 	idx = onode->nr_extent;
 	onode->o_extent[idx].start = start;
 	onode->o_extent[idx].count = count;
+	onode->o_extent[idx].data_len = req->data_length;
 	onode->nr_extent++;
 out:
 	return ret;
@@ -934,7 +936,7 @@ static int onode_read_extents(struct kv_onode *onode, struct http_request *req)
 	total_size = len;
 	for (i = 0; i < onode->nr_extent; i++) {
 		ext = onode->o_extent + i;
-		ext_len = ext->count * SD_DATA_OBJ_SIZE;
+		ext_len = ext->data_len;
 		if (off >= ext_len) {
 			off -= ext_len;
 			continue;
-- 
1.7.12.4