1 /* -*- Mode: C; tab-width: 4; c-basic-offset: 4; indent-tabs-mode: nil -*- */
2 /*
3  *     Copyright 2014-2020 Couchbase, Inc.
4  *
5  *   Licensed under the Apache License, Version 2.0 (the "License");
6  *   you may not use this file except in compliance with the License.
7  *   You may obtain a copy of the License at
8  *
9  *       http://www.apache.org/licenses/LICENSE-2.0
10  *
11  *   Unless required by applicable law or agreed to in writing, software
12  *   distributed under the License is distributed on an "AS IS" BASIS,
13  *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14  *   See the License for the specific language governing permissions and
15  *   limitations under the License.
16  */
17 
18 #include <libcouchbase/couchbase.h>
19 #include <libcouchbase/pktfwd.h>
20 #include "mc/mcreq.h"
21 #include "mc/forward.h"
22 #include "internal.h"
23 #include "rdb/rope.h"
24 
25 LIBCOUCHBASE_API
lcb_pktfwd3(lcb_INSTANCE *instance, const void *cookie, const lcb_CMDPKTFWD *cmd)26 lcb_STATUS lcb_pktfwd3(lcb_INSTANCE *instance, const void *cookie, const lcb_CMDPKTFWD *cmd)
27 {
28     int fwdopts = 0;
29     mc_PIPELINE *pl;
30     mc_PACKET *packet;
31     nb_IOV *iov, iov_s;
32     unsigned niov;
33     mc_IOVINFO ioi = {{0}};
34     lcb_STATUS err;
35 
36     if (cmd->nomap) {
37         fwdopts |= MC_FWD_OPT_NOMAP;
38         if (cmd->server_index >= LCBT_NSERVERS(instance)) {
39             return LCB_ERR_NO_MATCHING_SERVER;
40         } else {
41             pl = (mc_PIPELINE *)LCBT_GET_SERVER(instance, cmd->server_index);
42         }
43     }
44 
45     if (cmd->vb.vtype != LCB_KV_IOV) {
46         iov_s.iov_base = (void *)cmd->vb.u_buf.contig.bytes;
47         iov_s.iov_len = cmd->vb.u_buf.contig.nbytes;
48         iov = &iov_s;
49         niov = 1;
50 
51         if (cmd->vb.vtype == LCB_KV_COPY) {
52             fwdopts |= MC_FWD_OPT_COPY;
53         }
54     } else {
55         iov = (nb_IOV *)cmd->vb.u_buf.multi.iov;
56         niov = cmd->vb.u_buf.multi.niov;
57         ioi.total = cmd->vb.u_buf.multi.total_length;
58     }
59     mc_iovinfo_init(&ioi, iov, niov);
60 
61     err = mc_forward_packet(&instance->cmdq, &ioi, &packet, &pl, fwdopts);
62     if (err != LCB_SUCCESS) {
63         return err;
64     }
65 
66     /* set the cookie */
67     packet->u_rdata.reqdata.cookie = cookie;
68     packet->u_rdata.reqdata.start = gethrtime();
69     packet->u_rdata.reqdata.deadline =
70         packet->u_rdata.reqdata.start + LCB_US2NS(LCBT_SETTING(instance, operation_timeout));
71     return err;
72 }
73 
74 LIBCOUCHBASE_API
lcb_backbuf_ref(lcb_BACKBUF buf)75 void lcb_backbuf_ref(lcb_BACKBUF buf)
76 {
77     rdb_seg_ref(buf);
78 }
79 
80 LIBCOUCHBASE_API
lcb_backbuf_unref(lcb_BACKBUF buf)81 void lcb_backbuf_unref(lcb_BACKBUF buf)
82 {
83     rdb_seg_unref(buf);
84 }
85