GCOV - Varnish Cache


/*-
 * Copyright (c) 2013-2015 Varnish Software AS
 * All rights reserved.
 *
 * Author: Poul-Henning Kamp <phk@FreeBSD.org>
 *
 * 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 <stdlib.h>
#include <string.h>

#include "cache/cache.h"

#include "vmod_directors.h"

#include "vcc_directors_if.h"

struct vmod_directors_hash {
        unsigned                                magic;
#define VMOD_DIRECTORS_HASH_MAGIC               0xc08dd611
        struct vdir                             *vd;
};

static void v_matchproto_(vdi_release_f)
vmod_hash_release(VCL_BACKEND dir)
{
        struct vmod_directors_hash *hash;

        CHECK_OBJ_NOTNULL(dir, DIRECTOR_MAGIC);
        CAST_OBJ_NOTNULL(hash, dir->priv, VMOD_DIRECTORS_HASH_MAGIC);
        vdir_release(hash->vd);
}

static void v_matchproto_(vdi_destroy_f)
vmod_hash_destroy(VCL_BACKEND dir)
{
        struct vmod_directors_hash *rr;

        CHECK_OBJ_NOTNULL(dir, DIRECTOR_MAGIC);
        CAST_OBJ_NOTNULL(rr, dir->priv, VMOD_DIRECTORS_HASH_MAGIC);
        vdir_delete(&rr->vd);
        FREE_OBJ(rr);
}

static const struct vdi_methods vmod_hash_methods[1] = {{
        .magic =                VDI_METHODS_MAGIC,
        .type =                 "hash",
        .release =              vmod_hash_release,
        .destroy =              vmod_hash_destroy
}};


VCL_VOID v_matchproto_()
vmod_hash__init(VRT_CTX, struct vmod_directors_hash **rrp,
    const char *vcl_name)
{
        struct vmod_directors_hash *rr;

        CHECK_OBJ_NOTNULL(ctx, VRT_CTX_MAGIC);
        AN(rrp);
        AZ(*rrp);
        ALLOC_OBJ(rr, VMOD_DIRECTORS_HASH_MAGIC);
        AN(rr);
        *rrp = rr;
        vdir_new(ctx, &rr->vd, vcl_name, vmod_hash_methods, rr);
}

VCL_VOID v_matchproto_()
vmod_hash__fini(struct vmod_directors_hash **rrp)
{
        struct vmod_directors_hash *rr;

        TAKE_OBJ_NOTNULL(rr, rrp, VMOD_DIRECTORS_HASH_MAGIC);
        VRT_DelDirector(&rr->vd->dir);
}

VCL_VOID v_matchproto_()
vmod_hash_add_backend(VRT_CTX,
    struct vmod_directors_hash *rr, VCL_BACKEND be, double w)
{

        CHECK_OBJ_NOTNULL(ctx, VRT_CTX_MAGIC);
        CHECK_OBJ_NOTNULL(rr, VMOD_DIRECTORS_HASH_MAGIC);
        vdir_add_backend(ctx, rr->vd, be, w);
}

VCL_VOID v_matchproto_()
vmod_hash_remove_backend(VRT_CTX,
    struct vmod_directors_hash *rr, VCL_BACKEND be)
{

        CHECK_OBJ_NOTNULL(ctx, VRT_CTX_MAGIC);
        CHECK_OBJ_NOTNULL(rr, VMOD_DIRECTORS_HASH_MAGIC);
        vdir_remove_backend(ctx, rr->vd, be, NULL);
}

VCL_BACKEND v_matchproto_()
vmod_hash_backend(VRT_CTX, struct vmod_directors_hash *rr, VCL_STRANDS s)
{
        VCL_BACKEND be;
        double r;

        CHECK_OBJ_NOTNULL(ctx, VRT_CTX_MAGIC);
        CHECK_OBJ_ORNULL(ctx->bo, BUSYOBJ_MAGIC);
        CHECK_OBJ_NOTNULL(rr, VMOD_DIRECTORS_HASH_MAGIC);
        AN(s);

        r = VRT_HashStrands32(s);
        r = scalbn(r, -32);
        assert(r >= 0 && r <= 1.0);
        be = vdir_pick_be(ctx, rr->vd, r);
        return (be);
}

		varnish-cache/vmod/vmod_directors_hash.c
0		/*-
1		* Copyright (c) 2013-2015 Varnish Software AS
2		* All rights reserved.
3		*
4		* Author: Poul-Henning Kamp <phk@FreeBSD.org>
5		*
6		* SPDX-License-Identifier: BSD-2-Clause
7		*
8		* Redistribution and use in source and binary forms, with or without
9		* modification, are permitted provided that the following conditions
10		* are met:
11		* 1. Redistributions of source code must retain the above copyright
12		* notice, this list of conditions and the following disclaimer.
13		* 2. Redistributions in binary form must reproduce the above copyright
14		* notice, this list of conditions and the following disclaimer in the
15		* documentation and/or other materials provided with the distribution.
16		*
17		* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18		* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19		* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20		* ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
21		* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22		* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23		* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24		* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25		* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26		* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27		* SUCH DAMAGE.
28		*/
29
30		#include "config.h"
31
32		#include <stdlib.h>
33		#include <string.h>
34
35		#include "cache/cache.h"
36
37		#include "vmod_directors.h"
38
39		#include "vcc_directors_if.h"
40
41		struct vmod_directors_hash {
42		unsigned magic;
43		#define VMOD_DIRECTORS_HASH_MAGIC 0xc08dd611
44		struct vdir *vd;
45		};
46
47		static void v_matchproto_(vdi_release_f)
48	4	vmod_hash_release(VCL_BACKEND dir)
49		{
50		struct vmod_directors_hash *hash;
51
52	4	CHECK_OBJ_NOTNULL(dir, DIRECTOR_MAGIC);
53	4	CAST_OBJ_NOTNULL(hash, dir->priv, VMOD_DIRECTORS_HASH_MAGIC);
54	4	vdir_release(hash->vd);
55	4	}
56
57		static void v_matchproto_(vdi_destroy_f)
58	4	vmod_hash_destroy(VCL_BACKEND dir)
59		{
60		struct vmod_directors_hash *rr;
61
62	4	CHECK_OBJ_NOTNULL(dir, DIRECTOR_MAGIC);
63	4	CAST_OBJ_NOTNULL(rr, dir->priv, VMOD_DIRECTORS_HASH_MAGIC);
64	4	vdir_delete(&rr->vd);
65	4	FREE_OBJ(rr);
66	4	}
67
68		static const struct vdi_methods vmod_hash_methods[1] = {{
69		.magic = VDI_METHODS_MAGIC,
70		.type = "hash",
71		.release = vmod_hash_release,
72		.destroy = vmod_hash_destroy
73		}};
74
75
76		VCL_VOID v_matchproto_()
77	12	vmod_hash__init(VRT_CTX, struct vmod_directors_hash **rrp,
78		const char *vcl_name)
79		{
80		struct vmod_directors_hash *rr;
81
82	12	CHECK_OBJ_NOTNULL(ctx, VRT_CTX_MAGIC);
83	12	AN(rrp);
84	12	AZ(*rrp);
85	12	ALLOC_OBJ(rr, VMOD_DIRECTORS_HASH_MAGIC);
86	12	AN(rr);
87	12	*rrp = rr;
88	12	vdir_new(ctx, &rr->vd, vcl_name, vmod_hash_methods, rr);
89	12	}
90
91		VCL_VOID v_matchproto_()
92	4	vmod_hash__fini(struct vmod_directors_hash **rrp)
93		{
94		struct vmod_directors_hash *rr;
95
96	4	TAKE_OBJ_NOTNULL(rr, rrp, VMOD_DIRECTORS_HASH_MAGIC);
97	4	VRT_DelDirector(&rr->vd->dir);
98	4	}
99
100		VCL_VOID v_matchproto_()
101	28	vmod_hash_add_backend(VRT_CTX,
102		struct vmod_directors_hash *rr, VCL_BACKEND be, double w)
103		{
104
105	28	CHECK_OBJ_NOTNULL(ctx, VRT_CTX_MAGIC);
106	28	CHECK_OBJ_NOTNULL(rr, VMOD_DIRECTORS_HASH_MAGIC);
107	28	vdir_add_backend(ctx, rr->vd, be, w);
108	28	}
109
110		VCL_VOID v_matchproto_()
111	4	vmod_hash_remove_backend(VRT_CTX,
112		struct vmod_directors_hash *rr, VCL_BACKEND be)
113		{
114
115	4	CHECK_OBJ_NOTNULL(ctx, VRT_CTX_MAGIC);
116	4	CHECK_OBJ_NOTNULL(rr, VMOD_DIRECTORS_HASH_MAGIC);
117	4	vdir_remove_backend(ctx, rr->vd, be, NULL);
118	4	}
119
120		VCL_BACKEND v_matchproto_()
121	44	vmod_hash_backend(VRT_CTX, struct vmod_directors_hash *rr, VCL_STRANDS s)
122		{
123		VCL_BACKEND be;
124		double r;
125
126	44	CHECK_OBJ_NOTNULL(ctx, VRT_CTX_MAGIC);
127	44	CHECK_OBJ_ORNULL(ctx->bo, BUSYOBJ_MAGIC);
128	44	CHECK_OBJ_NOTNULL(rr, VMOD_DIRECTORS_HASH_MAGIC);
129	44	AN(s);
130
131	44	r = VRT_HashStrands32(s);
132	44	r = scalbn(r, -32);
133	44	assert(r >= 0 && r <= 1.0);
134	44	be = vdir_pick_be(ctx, rr->vd, r);
135	44	return (be);
136		}