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/*-
* Copyright (c) 2010-2015 Varnish Software AS
* All rights reserved.
*
* 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.
*
* All stuff related to the storage.* part of the namespace.
*
* "All" is actually only a wildcard function, which instantiates variables
* on demand under the storage.* tree of the namespace.
*
* About the syntax:
* -----------------
*
* One of our long term goals is to have dynamic storage configuration, such
* as the ability to add or remove a stevedore on the fly, without restarting
* the worker process.
*
* Even though this goal is far out in the future, it influences the syntax
* design of storage selection from VCL.
*
* In difference from backends, where we know the possible set of backends at
* compile time, we will not in the future know the identity of the stevedores
* available at compile time, so we have to rely on VRT name resolution.
*
* This indicates a namespace on the form storage.<stevedore>.<property>
*
* For each property, we must define a default value if the named stevedore
* does not exists, such that for instance stevedore.forgetit.freespace
* returns zero etc.
*
*/
#include "config.h"
#include <stdlib.h>
#include <string.h>
#include "vcc_compile.h"
void
vcc_stevedore(struct vcc *vcc, const char *stv_name)
{
struct symbol *sym;
char buf[1024];
CHECK_OBJ_NOTNULL(vcc, VCC_MAGIC);
bprintf(buf, "storage.%s", stv_name);
sym = VCC_MkSym(vcc, buf, SYM_MAIN, SYM_VAR, VCL_LOW, VCL_41);
AN(sym);
sym->type = STEVEDORE;
sym->eval = vcc_Eval_Var;
bprintf(buf, "VRT_stevedore(\"%s\")", stv_name);
sym->rname = TlDup(vcc, buf);
sym->r_methods = ~0;
}
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