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/*
Copyright (c) 2008-2012 Red Hat, Inc. <http://www.redhat.com>
This file is part of GlusterFS.
This file is licensed to you under your choice of the GNU Lesser
General Public License, version 3 or any later version (LGPLv3 or
later), or the GNU General Public License, version 2 (GPLv2), in all
cases as published by the Free Software Foundation.
*/
#ifndef _OPTIONS_H
#define _OPTIONS_H
#include <stdio.h>
#include <stdint.h>
#include <inttypes.h>
#include "xlator.h"
#include "libglusterfs-messages.h"
/* Add possible new type of option you may need */
typedef enum {
GF_OPTION_TYPE_ANY = 0,
GF_OPTION_TYPE_STR,
GF_OPTION_TYPE_INT,
GF_OPTION_TYPE_SIZET,
GF_OPTION_TYPE_PERCENT,
GF_OPTION_TYPE_PERCENT_OR_SIZET,
GF_OPTION_TYPE_BOOL,
GF_OPTION_TYPE_XLATOR,
GF_OPTION_TYPE_PATH,
GF_OPTION_TYPE_TIME,
GF_OPTION_TYPE_DOUBLE,
GF_OPTION_TYPE_INTERNET_ADDRESS,
GF_OPTION_TYPE_INTERNET_ADDRESS_LIST,
GF_OPTION_TYPE_PRIORITY_LIST,
GF_OPTION_TYPE_SIZE_LIST,
GF_OPTION_TYPE_CLIENT_AUTH_ADDR,
GF_OPTION_TYPE_MAX,
} volume_option_type_t;
typedef enum {
GF_OPT_VALIDATE_BOTH = 0,
GF_OPT_VALIDATE_MIN,
GF_OPT_VALIDATE_MAX,
} opt_validate_type_t;
typedef enum {
OPT_FLAG_NONE = 0,
OPT_FLAG_SETTABLE = 1 << 0, /* can be set using volume set */
OPT_FLAG_CLIENT_OPT = 1 << 1, /* affects clients */
OPT_FLAG_GLOBAL = 1 << 2, /* affects all instances of the particular xlator */
OPT_FLAG_FORCE = 1 << 3, /* needs force to be reset */
OPT_FLAG_NEVER_RESET = 1 << 4, /* which should not be reset */
OPT_FLAG_DOC = 1 << 5, /* can be shown in volume set help */
} opt_flags_t;
#define ZR_VOLUME_MAX_NUM_KEY 4
#define ZR_OPTION_MAX_ARRAY_SIZE 64
/* The maximum number of releases that an option could be backported to
* based on the release schedule as in August 2017 (3), plus one more
* Refer comment on volume_options.op_version for more information.
*/
#define GF_MAX_RELEASES 4
/* Custom validation functoins for options
* TODO: Need to check what sorts of validation is being done, and decide if
* passing the volinfo is actually required. If it is, then we should possibly
* try a solution in GD2 for this.
*/
/* typedef int (*option_validation_fn) (glusterd_volinfo_t *volinfo, dict_t *dict,
char *key, char *value, char **op_errstr);
*/
/* Each translator should define this structure */
typedef struct volume_options {
char *key[ZR_VOLUME_MAX_NUM_KEY];
/* different key, same meaning */
volume_option_type_t type;
double min; /* 0 means no range */
double max; /* 0 means no range */
char *value[ZR_OPTION_MAX_ARRAY_SIZE];
/* If specified, will check for one of
the value from this array */
char *default_value;
char *description; /* about the key */
/* Required for int options where only the min value
* is given and is 0. This will cause validation not to
* happen
*/
opt_validate_type_t validate;
/* The op-version at which this option was introduced.
* This is an array to support options that get backported to supported
* releases.
* Normally, an option introduced for a major release just has a single
* entry in the array, with op-version of the major release
* For an option that is backported, the op-versions of the all the
* releases it was ported to should be added, starting from the newest,
* to the oldest.
*/
uint32_t op_version[GF_MAX_RELEASES];
/* The op-version at which this option was deprecated.
* Follows the same rules as above.
*/
uint32_t deprecated[GF_MAX_RELEASES];
/* Additional flags for an option
* Check the OPT_FLAG_* enums for available flags
*/
uint32_t flags;
/* Tags applicable to this option, which can be used to group similar
* options
*/
char *tags[ZR_OPTION_MAX_ARRAY_SIZE];
/* A custom validation function if required
* TODO: See todo above for option_validation_fn
*/
/* option_validation_fn validate_fn; */
} volume_option_t;
typedef struct vol_opt_list {
struct list_head list;
volume_option_t *given_opt;
} volume_opt_list_t;
int xlator_tree_reconfigure (xlator_t *old_xl, xlator_t *new_xl);
int xlator_validate_rec (xlator_t *xlator, char **op_errstr);
int graph_reconf_validateopt (glusterfs_graph_t *graph, char **op_errstr);
int xlator_option_info_list (volume_opt_list_t *list, char *key,
char **def_val, char **descr);
/*
int validate_xlator_volume_options (xlator_t *xl, dict_t *options,
volume_option_t *opt, char **op_errstr);
*/
int xlator_options_validate_list (xlator_t *xl, dict_t *options,
volume_opt_list_t *list, char **op_errstr);
int xlator_option_validate (xlator_t *xl, char *key, char *value,
volume_option_t *opt, char **op_errstr);
int xlator_options_validate (xlator_t *xl, dict_t *options, char **errstr);
volume_option_t *
xlator_volume_option_get (xlator_t *xl, const char *key);
volume_option_t *
xlator_volume_option_get_list (volume_opt_list_t *vol_list, const char *key);
#define DECLARE_INIT_OPT(type_t, type) \
int \
xlator_option_init_##type (xlator_t *this, dict_t *options, char *key, \
type_t *val_p);
DECLARE_INIT_OPT(char *, str);
DECLARE_INIT_OPT(uint64_t, uint64);
DECLARE_INIT_OPT(int64_t, int64);
DECLARE_INIT_OPT(uint32_t, uint32);
DECLARE_INIT_OPT(int32_t, int32);
DECLARE_INIT_OPT(size_t, size);
DECLARE_INIT_OPT(uint64_t, size_uint64);
DECLARE_INIT_OPT(double, percent);
DECLARE_INIT_OPT(double, percent_or_size);
DECLARE_INIT_OPT(gf_boolean_t, bool);
DECLARE_INIT_OPT(xlator_t *, xlator);
DECLARE_INIT_OPT(char *, path);
DECLARE_INIT_OPT(double, double);
DECLARE_INIT_OPT(uint32_t, time);
#define DEFINE_INIT_OPT(type_t, type, conv) \
int \
xlator_option_init_##type (xlator_t *this, dict_t *options, char *key, \
type_t *val_p) \
{ \
int ret = 0; \
volume_option_t *opt = NULL; \
char *def_value = NULL; \
char *set_value = NULL; \
char *value = NULL; \
xlator_t *old_THIS = NULL; \
\
opt = xlator_volume_option_get (this, key); \
if (!opt) { \
gf_msg (this->name, GF_LOG_WARNING, EINVAL, \
LG_MSG_INVALID_ENTRY, \
"unknown option: %s", key); \
ret = -1; \
return ret; \
} \
def_value = opt->default_value; \
ret = dict_get_str (options, key, &set_value); \
\
if (def_value) \
value = def_value; \
if (set_value) \
value = set_value; \
if (!value) { \
gf_msg_trace (this->name, 0, "option %s not set", \
key); \
*val_p = (type_t)0; \
return 0; \
} \
if (value == def_value) { \
gf_msg_trace (this->name, 0, "option %s using default" \
" value %s", key, value); \
} else { \
gf_msg_debug (this->name, 0, "option %s using set" \
" value %s", key, value); \
} \
old_THIS = THIS; \
THIS = this; \
ret = conv (value, val_p); \
THIS = old_THIS; \
if (ret) { \
gf_msg (this->name, GF_LOG_INFO, 0, \
LG_MSG_CONVERSION_FAILED, \
"option %s conversion failed value %s", \
key, value); \
return ret; \
} \
ret = xlator_option_validate (this, key, value, opt, NULL); \
return ret; \
}
#define GF_OPTION_INIT(key, val, type, err_label) do { \
int val_ret = 0; \
val_ret = xlator_option_init_##type (THIS, THIS->options, \
key, &(val)); \
if (val_ret) \
goto err_label; \
} while (0)
#define DECLARE_RECONF_OPT(type_t, type) \
int \
xlator_option_reconf_##type (xlator_t *this, dict_t *options, char *key,\
type_t *val_p);
DECLARE_RECONF_OPT(char *, str);
DECLARE_RECONF_OPT(uint64_t, uint64);
DECLARE_RECONF_OPT(int64_t, int64);
DECLARE_RECONF_OPT(uint32_t, uint32);
DECLARE_RECONF_OPT(int32_t, int32);
DECLARE_RECONF_OPT(size_t, size);
DECLARE_RECONF_OPT(uint64_t, size_uint64);
DECLARE_RECONF_OPT(double, percent);
DECLARE_RECONF_OPT(double, percent_or_size);
DECLARE_RECONF_OPT(gf_boolean_t, bool);
DECLARE_RECONF_OPT(xlator_t *, xlator);
DECLARE_RECONF_OPT(char *, path);
DECLARE_RECONF_OPT(double, double);
DECLARE_RECONF_OPT(uint32_t, time);
#define DEFINE_RECONF_OPT(type_t, type, conv) \
int \
xlator_option_reconf_##type (xlator_t *this, dict_t *options, char *key, \
type_t *val_p) \
{ \
int ret = 0; \
volume_option_t *opt = NULL; \
char *def_value = NULL; \
char *set_value = NULL; \
char *value = NULL; \
xlator_t *old_THIS = NULL; \
\
opt = xlator_volume_option_get (this, key); \
if (!opt) { \
gf_msg (this->name, GF_LOG_WARNING, EINVAL, \
LG_MSG_INVALID_ENTRY, \
"unknown option: %s", key); \
ret = -1; \
return ret; \
} \
def_value = opt->default_value; \
ret = dict_get_str (options, key, &set_value); \
\
if (def_value) \
value = def_value; \
if (set_value) \
value = set_value; \
if (!value) { \
gf_msg_trace (this->name, 0, "option %s not set", key); \
*val_p = (type_t)0; \
return 0; \
} \
if (value == def_value) { \
gf_msg_trace (this->name, 0, \
"option %s using default value %s", \
key, value); \
} else { \
gf_msg_debug (this->name, 0, \
"option %s using set value %s", \
key, value); \
} \
old_THIS = THIS; \
THIS = this; \
ret = conv (value, val_p); \
THIS = old_THIS; \
if (ret) \
return ret; \
ret = xlator_option_validate (this, key, value, opt, NULL); \
return ret; \
}
#define GF_OPTION_RECONF(key, val, opt, type, err_label) do { \
int val_ret = 0; \
val_ret = xlator_option_reconf_##type (THIS, opt, key, \
&(val)); \
if (val_ret) \
goto err_label; \
} while (0)
#endif /* !_OPTIONS_H */
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