/**
* Build ce->resp and ce->resp->msg that it can be sent via TCP socket.
*
* Cache entry data is set as paged fragments of skb.
* See do_tcp_sendpages() as reference.
*
* We return skbs in the cache entry response w/o setting any
* network headers - tcp_transmit_skb() will do it for us.
*/
static int
tfw_cache_build_resp(TfwCacheEntry *ce)
{
int f = 0;
TdbVRec *trec = &ce->trec;
char *data;
struct sk_buff *skb = NULL;
/*
* Allocated response won't be checked by any filters and
* is used for sending response data only, so don't initialize
* connection and GFSM fields.
*/
ce->resp = (TfwHttpResp *)tfw_http_msg_alloc(Conn_Srv);
if (!ce->resp)
return -ENOMEM;
/* Deserialize offsets to pointers. */
ce->key = TDB_PTR(db->hdr, (unsigned long)ce->key);
ce->hdr_lens = TDB_PTR(db->hdr, (unsigned long)ce->hdr_lens);
ce->hdrs = TDB_PTR(db->hdr, (unsigned long)ce->hdrs);
ce->body = TDB_PTR(db->hdr, (unsigned long)ce->body);
/* See tfw_cache_copy_resp(). */
BUG_ON((char *)(trec + 1) + trec->len <= ce->hdrs);
trec = TDB_PTR(db->hdr, TDB_DI2O(trec->chunk_next));
for (data = ce->hdrs;
(long)trec != (long)db->hdr;
trec = TDB_PTR(db->hdr, TDB_DI2O(trec->chunk_next)),
data = trec->data)
{
int off, size = trec->len;
if (!skb || f == MAX_SKB_FRAGS) {
/* Protocol headers are placed in linear data only. */
skb = alloc_skb(SKB_HDR_SZ, GFP_ATOMIC);
if (!skb)
goto err_skb;
skb_reserve(skb, SKB_HDR_SZ);
ss_skb_queue_tail(&ce->resp->msg.skb_list, skb);
f = 0;
}
off = (unsigned long)data & ~PAGE_MASK;
size = (char *)(trec + 1) + trec->len - data;
skb_fill_page_desc(skb, f, virt_to_page(data), off, size);
++f;
}
return 0;
err_skb:
tfw_http_msg_free((TfwHttpMsg *)ce->resp);
return -ENOMEM;
}
TfwHttpReq *
test_req_alloc(void)
{
TfwHttpReq *req;
/* Actually there were more code here, mostly it was copy-paste from
* tfw_http_msg_alloc(). It is removed because we need to test how it
* initializes the message and we would not like to test the copy-paste.
*/
req = (TfwHttpReq *)tfw_http_msg_alloc(Conn_HttpClnt, 0);
BUG_ON(!req);
return req;
}
