GCOV - Varnish Cache


/*-
 * Copyright (c) 2013-2015 Varnish Software AS
 * All rights reserved.
 *
 * Author: Martin Blix Grydeland <martin@varnish-software.com>
 * Author: Poul-Henning Kamp <phk@phk.freebsd.dk>
 *
 * 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.
 *
 * Handle backend connections and backend request structures.
 *
 */

#include "config.h"

#include <stdlib.h>

#include "cache_varnishd.h"
#include "cache_filter.h"
#include "cache_objhead.h"

static struct mempool           *vbopool;

/*--------------------------------------------------------------------
 */

void
VBO_Init(void)
{

        vbopool = MPL_New("busyobj", &cache_param->pool_vbo,
            &cache_param->workspace_backend);
        AN(vbopool);
}

/*--------------------------------------------------------------------
 * BusyObj handling
 */

static struct busyobj *
vbo_New(void)
{
        struct busyobj *bo;
        unsigned sz;

        bo = MPL_Get(vbopool, &sz);
        XXXAN(bo);
        bo->magic = BUSYOBJ_MAGIC;
        bo->end = (char *)bo + sz;
        return (bo);
}

static void
vbo_Free(struct busyobj **bop)
{
        struct busyobj *bo;

        TAKE_OBJ_NOTNULL(bo, bop, BUSYOBJ_MAGIC);
        AZ(bo->htc);
        MPL_Free(vbopool, bo);
}

struct busyobj *
VBO_GetBusyObj(const struct worker *wrk, const struct req *req)
{
        struct busyobj *bo;
        uint16_t nhttp;
        unsigned sz;
        char *p;

        CHECK_OBJ_NOTNULL(wrk, WORKER_MAGIC);

        bo = vbo_New();
        CHECK_OBJ_NOTNULL(bo, BUSYOBJ_MAGIC);

        p = (void*)(bo + 1);
        p = (void*)PRNDUP(p);
        assert(p < bo->end);

        nhttp = (uint16_t)cache_param->http_max_hdr;
        sz = HTTP_estimate(nhttp);

        bo->bereq0 = HTTP_create(p, nhttp, sz);
        p += sz;
        p = (void*)PRNDUP(p);
        assert(p < bo->end);

        bo->bereq = HTTP_create(p, nhttp, sz);
        p += sz;
        p = (void*)PRNDUP(p);
        assert(p < bo->end);

        bo->beresp = HTTP_create(p, nhttp, sz);
        p += sz;
        p = (void*)PRNDUP(p);
        assert(p < bo->end);

        sz = cache_param->vsl_buffer;
        VSL_Setup(bo->vsl, p, sz);
        bo->vsl->wid = VXID_Get(wrk, VSL_BACKENDMARKER);
        p += sz;
        p = (void*)PRNDUP(p);
        assert(p < bo->end);

        bo->vfc = (void*)p;
        p += sizeof (*bo->vfc);
        p = (void*)PRNDUP(p);
        INIT_OBJ(bo->vfc, VFP_CTX_MAGIC);

        WS_Init(bo->ws, "bo", p, bo->end - p);

        bo->do_stream = 1;

        if (req->client_identity != NULL) {
                bo->client_identity = WS_Copy(bo->ws, req->client_identity, -1);
                XXXAN(bo->client_identity);
        }

        VRT_Assign_Backend(&bo->director_req, req->director_hint);
        bo->vcl = req->vcl;
        VCL_Ref(bo->vcl);

        bo->t_first = bo->t_prev = NAN;
        bo->connect_timeout = NAN;
        bo->first_byte_timeout = NAN;
        bo->between_bytes_timeout = NAN;

        memcpy(bo->digest, req->digest, sizeof bo->digest);

        return (bo);
}

void
VBO_ReleaseBusyObj(struct worker *wrk, struct busyobj **pbo)
{
        struct busyobj *bo;

        CHECK_OBJ_NOTNULL(wrk, WORKER_MAGIC);
        TAKE_OBJ_NOTNULL(bo, pbo, BUSYOBJ_MAGIC);
        CHECK_OBJ_ORNULL(bo->fetch_objcore, OBJCORE_MAGIC);

        AZ(bo->htc);
        AZ(bo->stale_oc);

        VSLb(bo->vsl, SLT_BereqAcct, "%ju %ju %ju %ju %ju %ju",
            (uintmax_t)bo->acct.bereq_hdrbytes,
            (uintmax_t)bo->acct.bereq_bodybytes,
            (uintmax_t)(bo->acct.bereq_hdrbytes + bo->acct.bereq_bodybytes),
            (uintmax_t)bo->acct.beresp_hdrbytes,
            (uintmax_t)bo->acct.beresp_bodybytes,
            (uintmax_t)(bo->acct.beresp_hdrbytes + bo->acct.beresp_bodybytes));

        VSL_End(bo->vsl);

        AZ(bo->htc);

        if (WS_Overflowed(bo->ws))
                wrk->stats->ws_backend_overflow++;

        if (bo->fetch_objcore != NULL) {
                (void)HSH_DerefObjCore(wrk, &bo->fetch_objcore,
                    HSH_RUSH_POLICY);
        }

        VRT_Assign_Backend(&bo->director_req, NULL);
        VRT_Assign_Backend(&bo->director_resp, NULL);
        VCL_Rel(&bo->vcl);
#ifdef ENABLE_WORKSPACE_EMULATOR
        WS_Rollback(bo->ws, 0);
#endif

        memset(&bo->retries, 0,
            sizeof *bo - offsetof(struct busyobj, retries));

        vbo_Free(&bo);
}

		varnish-cache/bin/varnishd/cache/cache_busyobj.c
0		/*-
1		* Copyright (c) 2013-2015 Varnish Software AS
2		* All rights reserved.
3		*
4		* Author: Martin Blix Grydeland <martin@varnish-software.com>
5		* Author: Poul-Henning Kamp <phk@phk.freebsd.dk>
6		*
7		* SPDX-License-Identifier: BSD-2-Clause
8		*
9		* Redistribution and use in source and binary forms, with or without
10		* modification, are permitted provided that the following conditions
11		* are met:
12		* 1. Redistributions of source code must retain the above copyright
13		* notice, this list of conditions and the following disclaimer.
14		* 2. Redistributions in binary form must reproduce the above copyright
15		* notice, this list of conditions and the following disclaimer in the
16		* documentation and/or other materials provided with the distribution.
17		*
18		* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
19		* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20		* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21		* ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
22		* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23		* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24		* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25		* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26		* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27		* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28		* SUCH DAMAGE.
29		*
30		* Handle backend connections and backend request structures.
31		*
32		*/
33
34		#include "config.h"
35
36		#include <stdlib.h>
37
38		#include "cache_varnishd.h"
39		#include "cache_filter.h"
40		#include "cache_objhead.h"
41
42		static struct mempool *vbopool;
43
44		/*--------------------------------------------------------------------
45		*/
46
47		void
48	36676	VBO_Init(void)
49		{
50
51	73352	vbopool = MPL_New("busyobj", &cache_param->pool_vbo,
52	36676	&cache_param->workspace_backend);
53	36676	AN(vbopool);
54	36676	}
55
56		/*--------------------------------------------------------------------
57		* BusyObj handling
58		*/
59
60		static struct busyobj *
61	89200	vbo_New(void)
62		{
63		struct busyobj *bo;
64		unsigned sz;
65
66	89200	bo = MPL_Get(vbopool, &sz);
67	89200	XXXAN(bo);
68	89200	bo->magic = BUSYOBJ_MAGIC;
69	89200	bo->end = (char *)bo + sz;
70	89200	return (bo);
71		}
72
73		static void
74	89160	vbo_Free(struct busyobj **bop)
75		{
76		struct busyobj *bo;
77
78	89160	TAKE_OBJ_NOTNULL(bo, bop, BUSYOBJ_MAGIC);
79	89160	AZ(bo->htc);
80	89160	MPL_Free(vbopool, bo);
81	89160	}
82
83		struct busyobj *
84	89200	VBO_GetBusyObj(const struct worker wrk, const struct req req)
85		{
86		struct busyobj *bo;
87		uint16_t nhttp;
88		unsigned sz;
89		char *p;
90
91	89200	CHECK_OBJ_NOTNULL(wrk, WORKER_MAGIC);
92
93	89200	bo = vbo_New();
94	89200	CHECK_OBJ_NOTNULL(bo, BUSYOBJ_MAGIC);
95
96	89200	p = (void*)(bo + 1);
97	89200	p = (void*)PRNDUP(p);
98	89200	assert(p < bo->end);
99
100	89200	nhttp = (uint16_t)cache_param->http_max_hdr;
101	89200	sz = HTTP_estimate(nhttp);
102
103	89200	bo->bereq0 = HTTP_create(p, nhttp, sz);
104	89200	p += sz;
105	89200	p = (void*)PRNDUP(p);
106	89200	assert(p < bo->end);
107
108	89200	bo->bereq = HTTP_create(p, nhttp, sz);
109	89200	p += sz;
110	89200	p = (void*)PRNDUP(p);
111	89200	assert(p < bo->end);
112
113	89200	bo->beresp = HTTP_create(p, nhttp, sz);
114	89200	p += sz;
115	89200	p = (void*)PRNDUP(p);
116	89200	assert(p < bo->end);
117
118	89200	sz = cache_param->vsl_buffer;
119	89200	VSL_Setup(bo->vsl, p, sz);
120	89200	bo->vsl->wid = VXID_Get(wrk, VSL_BACKENDMARKER);
121	89200	p += sz;
122	89200	p = (void*)PRNDUP(p);
123	89200	assert(p < bo->end);
124
125	89200	bo->vfc = (void*)p;
126	89200	p += sizeof (*bo->vfc);
127	89200	p = (void*)PRNDUP(p);
128	89200	INIT_OBJ(bo->vfc, VFP_CTX_MAGIC);
129
130	89200	WS_Init(bo->ws, "bo", p, bo->end - p);
131
132	89200	bo->do_stream = 1;
133
134	89200	if (req->client_identity != NULL) {
135	40	bo->client_identity = WS_Copy(bo->ws, req->client_identity, -1);
136	40	XXXAN(bo->client_identity);
137	40	}
138
139	89200	VRT_Assign_Backend(&bo->director_req, req->director_hint);
140	89200	bo->vcl = req->vcl;
141	89200	VCL_Ref(bo->vcl);
142
143	89200	bo->t_first = bo->t_prev = NAN;
144	89200	bo->connect_timeout = NAN;
145	89200	bo->first_byte_timeout = NAN;
146	89200	bo->between_bytes_timeout = NAN;
147
148	89200	memcpy(bo->digest, req->digest, sizeof bo->digest);
149
150	89200	return (bo);
151		}
152
153		void
154	89160	VBO_ReleaseBusyObj(struct worker wrk, struct busyobj *pbo)
155		{
156		struct busyobj *bo;
157
158	89160	CHECK_OBJ_NOTNULL(wrk, WORKER_MAGIC);
159	89160	TAKE_OBJ_NOTNULL(bo, pbo, BUSYOBJ_MAGIC);
160	89160	CHECK_OBJ_ORNULL(bo->fetch_objcore, OBJCORE_MAGIC);
161
162	89160	AZ(bo->htc);
163	89160	AZ(bo->stale_oc);
164
165	178320	VSLb(bo->vsl, SLT_BereqAcct, "%ju %ju %ju %ju %ju %ju",
166	89160	(uintmax_t)bo->acct.bereq_hdrbytes,
167	89160	(uintmax_t)bo->acct.bereq_bodybytes,
168	89160	(uintmax_t)(bo->acct.bereq_hdrbytes + bo->acct.bereq_bodybytes),
169	89160	(uintmax_t)bo->acct.beresp_hdrbytes,
170	89160	(uintmax_t)bo->acct.beresp_bodybytes,
171	89160	(uintmax_t)(bo->acct.beresp_hdrbytes + bo->acct.beresp_bodybytes));
172
173	89160	VSL_End(bo->vsl);
174
175	89160	AZ(bo->htc);
176
177	89160	if (WS_Overflowed(bo->ws))
178	6800	wrk->stats->ws_backend_overflow++;
179
180	89160	if (bo->fetch_objcore != NULL) {
181	87920	(void)HSH_DerefObjCore(wrk, &bo->fetch_objcore,
182		HSH_RUSH_POLICY);
183	87920	}
184
185	89160	VRT_Assign_Backend(&bo->director_req, NULL);
186	89160	VRT_Assign_Backend(&bo->director_resp, NULL);
187	89160	VCL_Rel(&bo->vcl);
188		#ifdef ENABLE_WORKSPACE_EMULATOR
189		WS_Rollback(bo->ws, 0);
190		#endif
191
192	89160	memset(&bo->retries, 0,
193		sizeof *bo - offsetof(struct busyobj, retries));
194
195	89160	vbo_Free(&bo);
196	89160	}