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4223. [func] Add support for setting max-cache-size to percentage

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of available physical memory, set default to 90%.
			[RT #38442]
This commit is contained in:
Witold Krecicki
2015-09-28 11:08:50 +02:00
parent 98a7f8c7ae
commit e6d0a391f5
20 changed files with 396 additions and 29 deletions
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70
lib/isccfg/parser.c
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@@ -123,6 +123,7 @@ cfg_rep_t cfg_rep_sockaddr = { "sockaddr", free_noop };
cfg_rep_t cfg_rep_netprefix = { "netprefix", free_noop };
cfg_rep_t cfg_rep_void = { "void", free_noop };
cfg_rep_t cfg_rep_fixedpoint = { "fixedpoint", free_noop };
cfg_rep_t cfg_rep_percentage = { "percentage", free_noop };
/*
* Configuration type definitions.
@@ -650,6 +651,69 @@ cfg_type_t cfg_type_void = {
"void", cfg_parse_void, cfg_print_void, cfg_doc_void, &cfg_rep_void,
NULL };
/*
* percentage
*/
isc_result_t
cfg_parse_percentage(cfg_parser_t *pctx, const cfg_type_t *type,
cfg_obj_t **ret)
{
char *endp;
isc_result_t result;
cfg_obj_t *obj = NULL;
isc_uint32_t percent;
UNUSED(type);
CHECK(cfg_gettoken(pctx, 0));
if (pctx->token.type != isc_tokentype_string) {
cfg_parser_error(pctx, CFG_LOG_NEAR,
"expected percentage");
return (ISC_R_UNEXPECTEDTOKEN);
}
percent = isc_string_touint64(TOKEN_STRING(pctx), &endp, 10);
if (*endp != '%' || *(endp+1) != 0) {
cfg_parser_error(pctx, CFG_LOG_NEAR,
"expected percentage");
return (ISC_R_UNEXPECTEDTOKEN);
}
CHECK(cfg_create_obj(pctx, &cfg_type_percentage, &obj));
obj->value.uint32 = percent;
*ret = obj;
cleanup:
return (result);
}
void
cfg_print_percentage(cfg_printer_t *pctx, const cfg_obj_t *obj) {
char buf[64];
int n;
n = snprintf(buf, sizeof(buf), "%u%%", obj->value.uint32);
INSIST(n > 0 && (size_t)n < sizeof(buf));
cfg_print_chars(pctx, buf, strlen(buf));
}
isc_uint32_t
cfg_obj_aspercentage(const cfg_obj_t *obj) {
REQUIRE(obj != NULL && obj->type->rep == &cfg_rep_percentage);
return (obj->value.uint32);
}
cfg_type_t cfg_type_percentage = {
"percentage", cfg_parse_percentage, cfg_print_percentage,
cfg_doc_terminal, &cfg_rep_percentage, NULL
};
isc_boolean_t
cfg_obj_ispercentage(const cfg_obj_t *obj) {
REQUIRE(obj != NULL);
return (ISC_TF(obj->type->rep == &cfg_rep_percentage));
}
/*
* Fixed point
*/
@@ -724,6 +788,12 @@ cfg_type_t cfg_type_fixedpoint = {
cfg_doc_terminal, &cfg_rep_fixedpoint, NULL
};
isc_boolean_t
cfg_obj_isfixedpoint(const cfg_obj_t *obj) {
REQUIRE(obj != NULL);
return (ISC_TF(obj->type->rep == &cfg_rep_fixedpoint));
}
/*
* uint32
*/