GCOV - Varnish Cache


/*-
 * Copyright (c) 2006 Verdens Gang AS
 * Copyright (c) 2006-2015 Varnish Software AS
 * Copyright 2024 UPLEX - Nils Goroll Systemoptimierung
 * All rights reserved.
 *
 * Authors: Poul-Henning Kamp <phk@phk.freebsd.dk>
 *          Nils Goroll <slink@uplex.de>
 *
 * SPDX-License-Identifier: BSD-2-Clause
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#include "config.h"

#include "cache/cache_varnishd.h"

#include "cache/cache_filter.h"
#include "cache/cache_transport.h"
#include "http1/cache_http1.h"

#include "vmod_debug.h"

static void
dbg_error(struct req *req, struct v1l **v1lp, const char *msg)
{

        (void)req;
        (void)v1lp;
        (void)msg;
        INCOMPL();
}

static void dbg_deliver_finish(struct req *req, struct v1l **v1lp, int err);
static void dbg_sendbody(struct worker *wrk, void *arg);

static task_func_t *hack_http1_req = NULL;

// copied from cache_http_deliver.c, then split & modified
static enum vtr_deliver_e v_matchproto_(vtr_deliver_f)
dbg_deliver(struct req *req, int sendbody)
{
        struct vrt_ctx ctx[1];
        struct v1l *v1l;

        CHECK_OBJ_NOTNULL(req, REQ_MAGIC);
        CHECK_OBJ_ORNULL(req->boc, BOC_MAGIC);
        CHECK_OBJ_NOTNULL(req->objcore, OBJCORE_MAGIC);

        if (req->doclose == SC_NULL &&
            http_HdrIs(req->resp, H_Connection, "close")) {
                req->doclose = SC_RESP_CLOSE;
        } else if (req->doclose != SC_NULL) {
                if (!http_HdrIs(req->resp, H_Connection, "close")) {
                        http_Unset(req->resp, H_Connection);
                        http_SetHeader(req->resp, "Connection: close");
                }
        } else if (!http_GetHdr(req->resp, H_Connection, NULL))
                http_SetHeader(req->resp, "Connection: keep-alive");

        CHECK_OBJ_NOTNULL(req->wrk, WORKER_MAGIC);

        v1l = V1L_Open(req->ws, &req->sp->fd, req->vsl,
            req->t_prev + SESS_TMO(req->sp, send_timeout),
            cache_param->http1_iovs);

        if (v1l == NULL) {
                dbg_error(req, &v1l, "Failure to init v1d (workspace_thread overflow)");
                return (VTR_D_DONE);
        }

        // Do not roll back req->ws upon V1L_Close()
        V1L_NoRollback(v1l);

        if (sendbody) {
                if (!http_GetHdr(req->resp, H_Content_Length, NULL)) {
                        if (req->http->protover == 11) {
                                http_SetHeader(req->resp,
                                    "Transfer-Encoding: chunked");
                        } else {
                                req->doclose = SC_TX_EOF;
                        }
                }
                INIT_OBJ(ctx, VRT_CTX_MAGIC);
                VCL_Req2Ctx(ctx, req);
                if (VDP_Push(ctx, req->vdc, req->ws, VDP_v1l, v1l)) {
                        dbg_error(req, &v1l, "Failure to push v1d processor");
                        return (VTR_D_DONE);
                }
        }

        if (WS_Overflowed(req->ws)) {
                dbg_error(req, &v1l, "workspace_client overflow");
                return (VTR_D_DONE);
        }

        if (WS_Overflowed(req->sp->ws)) {
                dbg_error(req, &v1l, "workspace_session overflow");
                return (VTR_D_DONE);
        }

        if (WS_Overflowed(req->wrk->aws)) {
                dbg_error(req, &v1l, "workspace_thread overflow");
                return (VTR_D_DONE);
        }

        req->acct.resp_hdrbytes += HTTP1_Write(v1l, req->resp, HTTP1_Resp);

        if (! sendbody) {
                dbg_deliver_finish(req, &v1l, 0);
                return (VTR_D_DONE);
        }

        (void)V1L_Flush(v1l);

        if (hack_http1_req == NULL)
                hack_http1_req = req->task->func;
        AN(hack_http1_req);

        VSLb(req->vsl, SLT_Debug, "w=%p scheduling dbg_sendbody", req->wrk);

        req->task->func = dbg_sendbody;
        req->task->priv = req;

        req->wrk = NULL;
        req->vdc->wrk = NULL;
        req->transport_priv = v1l;

        AZ(Pool_Task(req->sp->pool, req->task, TASK_QUEUE_RUSH));
        return (VTR_D_DISEMBARK);
}

static void v_matchproto_(task_func_t)
dbg_sendbody(struct worker *wrk, void *arg)
{
        struct req *req;
        struct v1l *v1l;
        const char *p;
        int err, chunked;

        CHECK_OBJ_NOTNULL(wrk, WORKER_MAGIC);
        CAST_OBJ_NOTNULL(req, arg, REQ_MAGIC);
        v1l = req->transport_priv;
        req->transport_priv = NULL;
        AN(v1l);

        THR_SetRequest(req);
        VSLb(req->vsl, SLT_Debug, "w=%p enter dbg_sendbody", wrk);
        AZ(req->wrk);
        CNT_Embark(wrk, req);
        req->vdc->wrk = wrk;    // move to CNT_Embark?

        chunked = http_GetHdr(req->resp, H_Transfer_Encoding, &p) && strcmp(p, "chunked") == 0;
        if (chunked)
                V1L_Chunked(v1l);
        err = VDP_DeliverObj(req->vdc, req->objcore);
        if (!err && chunked)
                V1L_EndChunk(v1l);
        dbg_deliver_finish(req, &v1l, err);

        VSLb(req->vsl, SLT_Debug, "w=%p resuming http1_req", wrk);
        wrk->task->func = hack_http1_req;
        wrk->task->priv = req;
}

static void
dbg_deliver_finish(struct req *req, struct v1l **v1lp, int err)
{
        stream_close_t sc;
        uint64_t bytes;

        sc = V1L_Close(v1lp, &bytes);

        req->acct.resp_bodybytes += VDP_Close(req->vdc, req->objcore, req->boc);

        if (sc == SC_NULL && err && req->sp->fd >= 0)
                sc = SC_REM_CLOSE;
        if (sc != SC_NULL)
                Req_Fail(req, sc);
}

static struct transport DBG_transport;

void
debug_transport_reembarking_http1_init(void)
{
        DBG_transport = HTTP1_transport;
        DBG_transport.name = "DBG";
        DBG_transport.deliver = dbg_deliver;
}

void
debug_transport_reembarking_http1_use(VRT_CTX)
{
        struct req *req;

        CHECK_OBJ_NOTNULL(ctx, VRT_CTX_MAGIC);
        req = ctx->req;
        CHECK_OBJ_NOTNULL(req, REQ_MAGIC);

        if (req->transport != &HTTP1_transport) {
                VRT_fail(ctx, "Only works on built-in http1 transport");
                return;
        }
        AZ(req->transport_priv);
        req->transport = &DBG_transport;
}

		varnish-cache/vmod/vmod_debug_transport_reembarking_http1.c
0		/*-
1		* Copyright (c) 2006 Verdens Gang AS
2		* Copyright (c) 2006-2015 Varnish Software AS
3		* Copyright 2024 UPLEX - Nils Goroll Systemoptimierung
4		* All rights reserved.
5		*
6		* Authors: Poul-Henning Kamp <phk@phk.freebsd.dk>
7		* Nils Goroll <slink@uplex.de>
8		*
9		* SPDX-License-Identifier: BSD-2-Clause
10		*
11		* Redistribution and use in source and binary forms, with or without
12		* modification, are permitted provided that the following conditions
13		* are met:
14		* 1. Redistributions of source code must retain the above copyright
15		* notice, this list of conditions and the following disclaimer.
16		* 2. Redistributions in binary form must reproduce the above copyright
17		* notice, this list of conditions and the following disclaimer in the
18		* documentation and/or other materials provided with the distribution.
19		*
20		* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
21		* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22		* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23		* ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
24		* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25		* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26		* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27		* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28		* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29		* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30		* SUCH DAMAGE.
31		*/
32
33		#include "config.h"
34
35		#include "cache/cache_varnishd.h"
36
37		#include "cache/cache_filter.h"
38		#include "cache/cache_transport.h"
39		#include "http1/cache_http1.h"
40
41		#include "vmod_debug.h"
42
43		static void
44	0	dbg_error(struct req req, struct v1l v1lp, const char msg)
45		{
46
47	0	(void)req;
48	0	(void)v1lp;
49	0	(void)msg;
50	0	INCOMPL();
51	0	}
52
53		static void dbg_deliver_finish(struct req req, struct v1l *v1lp, int err);
54		static void dbg_sendbody(struct worker wrk, void arg);
55
56		static task_func_t *hack_http1_req = NULL;
57
58		// copied from cache_http_deliver.c, then split & modified
59		static enum vtr_deliver_e v_matchproto_(vtr_deliver_f)
60	32	dbg_deliver(struct req *req, int sendbody)
61		{
62		struct vrt_ctx ctx[1];
63		struct v1l *v1l;
64
65	32	CHECK_OBJ_NOTNULL(req, REQ_MAGIC);
66	32	CHECK_OBJ_ORNULL(req->boc, BOC_MAGIC);
67	32	CHECK_OBJ_NOTNULL(req->objcore, OBJCORE_MAGIC);
68
69	32	if (req->doclose == SC_NULL &&
70	32	http_HdrIs(req->resp, H_Connection, "close")) {
71	0	req->doclose = SC_RESP_CLOSE;
72	32	} else if (req->doclose != SC_NULL) {
73	0	if (!http_HdrIs(req->resp, H_Connection, "close")) {
74	0	http_Unset(req->resp, H_Connection);
75	0	http_SetHeader(req->resp, "Connection: close");
76	0	}
77	32	} else if (!http_GetHdr(req->resp, H_Connection, NULL))
78	32	http_SetHeader(req->resp, "Connection: keep-alive");
79
80	32	CHECK_OBJ_NOTNULL(req->wrk, WORKER_MAGIC);
81
82	64	v1l = V1L_Open(req->ws, &req->sp->fd, req->vsl,
83	32	req->t_prev + SESS_TMO(req->sp, send_timeout),
84	32	cache_param->http1_iovs);
85
86	32	if (v1l == NULL) {
87	0	dbg_error(req, &v1l, "Failure to init v1d (workspace_thread overflow)");
88	0	return (VTR_D_DONE);
89		}
90
91		// Do not roll back req->ws upon V1L_Close()
92	32	V1L_NoRollback(v1l);
93
94	32	if (sendbody) {
95	32	if (!http_GetHdr(req->resp, H_Content_Length, NULL)) {
96	16	if (req->http->protover == 11) {
97	16	http_SetHeader(req->resp,
98		"Transfer-Encoding: chunked");
99	16	} else {
100	0	req->doclose = SC_TX_EOF;
101		}
102	16	}
103	32	INIT_OBJ(ctx, VRT_CTX_MAGIC);
104	32	VCL_Req2Ctx(ctx, req);
105	32	if (VDP_Push(ctx, req->vdc, req->ws, VDP_v1l, v1l)) {
106	0	dbg_error(req, &v1l, "Failure to push v1d processor");
107	0	return (VTR_D_DONE);
108		}
109	32	}
110
111	32	if (WS_Overflowed(req->ws)) {
112	0	dbg_error(req, &v1l, "workspace_client overflow");
113	0	return (VTR_D_DONE);
114		}
115
116	32	if (WS_Overflowed(req->sp->ws)) {
117	0	dbg_error(req, &v1l, "workspace_session overflow");
118	0	return (VTR_D_DONE);
119		}
120
121	32	if (WS_Overflowed(req->wrk->aws)) {
122	0	dbg_error(req, &v1l, "workspace_thread overflow");
123	0	return (VTR_D_DONE);
124		}
125
126	32	req->acct.resp_hdrbytes += HTTP1_Write(v1l, req->resp, HTTP1_Resp);
127
128	32	if (! sendbody) {
129	0	dbg_deliver_finish(req, &v1l, 0);
130	0	return (VTR_D_DONE);
131		}
132
133	32	(void)V1L_Flush(v1l);
134
135	32	if (hack_http1_req == NULL)
136	1	hack_http1_req = req->task->func;
137	32	AN(hack_http1_req);
138
139	32	VSLb(req->vsl, SLT_Debug, "w=%p scheduling dbg_sendbody", req->wrk);
140
141	32	req->task->func = dbg_sendbody;
142	32	req->task->priv = req;
143
144	32	req->wrk = NULL;
145	32	req->vdc->wrk = NULL;
146	32	req->transport_priv = v1l;
147
148	32	AZ(Pool_Task(req->sp->pool, req->task, TASK_QUEUE_RUSH));
149	32	return (VTR_D_DISEMBARK);
150	32	}
151
152		static void v_matchproto_(task_func_t)
153	32	dbg_sendbody(struct worker wrk, void arg)
154		{
155		struct req *req;
156		struct v1l *v1l;
157		const char *p;
158		int err, chunked;
159
160	32	CHECK_OBJ_NOTNULL(wrk, WORKER_MAGIC);
161	32	CAST_OBJ_NOTNULL(req, arg, REQ_MAGIC);
162	32	v1l = req->transport_priv;
163	32	req->transport_priv = NULL;
164	32	AN(v1l);
165
166	32	THR_SetRequest(req);
167	32	VSLb(req->vsl, SLT_Debug, "w=%p enter dbg_sendbody", wrk);
168	32	AZ(req->wrk);
169	32	CNT_Embark(wrk, req);
170	32	req->vdc->wrk = wrk; // move to CNT_Embark?
171
172	32	chunked = http_GetHdr(req->resp, H_Transfer_Encoding, &p) && strcmp(p, "chunked") == 0;
173	32	if (chunked)
174	16	V1L_Chunked(v1l);
175	32	err = VDP_DeliverObj(req->vdc, req->objcore);
176	32	if (!err && chunked)
177	16	V1L_EndChunk(v1l);
178	32	dbg_deliver_finish(req, &v1l, err);
179
180	32	VSLb(req->vsl, SLT_Debug, "w=%p resuming http1_req", wrk);
181	32	wrk->task->func = hack_http1_req;
182	32	wrk->task->priv = req;
183	32	}
184
185		static void
186	32	dbg_deliver_finish(struct req req, struct v1l *v1lp, int err)
187		{
188		stream_close_t sc;
189		uint64_t bytes;
190
191	32	sc = V1L_Close(v1lp, &bytes);
192
193	32	req->acct.resp_bodybytes += VDP_Close(req->vdc, req->objcore, req->boc);
194
195	32	if (sc == SC_NULL && err && req->sp->fd >= 0)
196	0	sc = SC_REM_CLOSE;
197	32	if (sc != SC_NULL)
198	0	Req_Fail(req, sc);
199	32	}
200
201		static struct transport DBG_transport;
202
203		void
204	98	debug_transport_reembarking_http1_init(void)
205		{
206	98	DBG_transport = HTTP1_transport;
207	98	DBG_transport.name = "DBG";
208	98	DBG_transport.deliver = dbg_deliver;
209	98	}
210
211		void
212	32	debug_transport_reembarking_http1_use(VRT_CTX)
213		{
214		struct req *req;
215
216	32	CHECK_OBJ_NOTNULL(ctx, VRT_CTX_MAGIC);
217	32	req = ctx->req;
218	32	CHECK_OBJ_NOTNULL(req, REQ_MAGIC);
219
220	32	if (req->transport != &HTTP1_transport) {
221	0	VRT_fail(ctx, "Only works on built-in http1 transport");
222	0	return;
223		}
224	32	AZ(req->transport_priv);
225	32	req->transport = &DBG_transport;
226	32	}