/* Configuration file parsing and CONFIG GET/SET commands implementation.
*
* Copyright (c) 2009-2012, Salvatore Sanfilippo <antirez at gmail dot com>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* * 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.
* * Neither the name of Redis nor the names of its contributors may be used
* to endorse or promote products derived from this software without
* specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 THE COPYRIGHT OWNER 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 "server.h"
#include "cluster.h"
#include <fcntl.h>
#include <sys/stat.h>
/*-----------------------------------------------------------------------------
* Config file name-value maps.
*----------------------------------------------------------------------------*/
typedef struct configEnum {
const char *name;
const int val;
} configEnum;
configEnum maxmemory_policy_enum[] = {
{"volatile-lru", MAXMEMORY_VOLATILE_LRU},
{"volatile-lfu", MAXMEMORY_VOLATILE_LFU},
{"volatile-random",MAXMEMORY_VOLATILE_RANDOM},
{"volatile-ttl",MAXMEMORY_VOLATILE_TTL},
{"allkeys-lru",MAXMEMORY_ALLKEYS_LRU},
{"allkeys-lfu",MAXMEMORY_ALLKEYS_LFU},
{"allkeys-random",MAXMEMORY_ALLKEYS_RANDOM},
{"noeviction",MAXMEMORY_NO_EVICTION},
{NULL, 0}
};
configEnum syslog_facility_enum[] = {
{"user", LOG_USER},
{"local0", LOG_LOCAL0},
{"local1", LOG_LOCAL1},
{"local2", LOG_LOCAL2},
{"local3", LOG_LOCAL3},
{"local4", LOG_LOCAL4},
{"local5", LOG_LOCAL5},
{"local6", LOG_LOCAL6},
{"local7", LOG_LOCAL7},
{NULL, 0}
};
configEnum loglevel_enum[] = {
{"debug", LL_DEBUG},
{"verbose", LL_VERBOSE},
{"notice", LL_NOTICE},
{"warning", LL_WARNING},
{NULL,0}
};
configEnum supervised_mode_enum[] = {
{"upstart", SUPERVISED_UPSTART},
{"systemd", SUPERVISED_SYSTEMD},
{"auto", SUPERVISED_AUTODETECT},
{"no", SUPERVISED_NONE},
{NULL, 0}
};
configEnum aof_fsync_enum[] = {
{"everysec", AOF_FSYNC_EVERYSEC},
{"always", AOF_FSYNC_ALWAYS},
{"no", AOF_FSYNC_NO},
{NULL, 0}
};
configEnum repl_diskless_load_enum[] = {
{"disabled", REPL_DISKLESS_LOAD_DISABLED},
{"on-empty-db", REPL_DISKLESS_LOAD_WHEN_DB_EMPTY},
{"swapdb", REPL_DISKLESS_LOAD_SWAPDB},
{NULL, 0}
};
/* Output buffer limits presets. */
clientBufferLimitsConfig clientBufferLimitsDefaults[CLIENT_TYPE_OBUF_COUNT] = {
{0, 0, 0}, /* normal */
{1024*1024*256, 1024*1024*64, 60}, /* slave */
{1024*1024*32, 1024*1024*8, 60} /* pubsub */
};
/* Generic config infrastructure function pointers
* int is_valid_fn(val, err)
* Return 1 when val is valid, and 0 when invalid.
* Optionslly set err to a static error string.
* int update_fn(val, prev, err)
* This function is called only for CONFIG SET command (not at config file parsing)
* It is called after the actual config is applied,
* Return 1 for success, and 0 for failure.
* Optionslly set err to a static error string.
* On failure the config change will be reverted.
*/
/* Configuration values that require no special handling to set, get, load or
* rewrite. */
typedef struct boolConfigData {
int *config; /* The pointer to the server config this value is stored in */
const int default_value; /* The default value of the config on rewrite */
int (*is_valid_fn)(int val, char **err); /* Optional function to check validity of new value (generic doc above) */
int (*update_fn)(int val, int prev, char **err); /* Optional function to apply new value at runtime (generic doc above) */
} boolConfigData;
typedef struct stringConfigData {
char **config; /* Pointer to the server config this value is stored in. */
const char *default_value; /* Default value of the config on rewrite. */
int (*is_valid_fn)(char* val, char **err); /* Optional function to check validity of new value (generic doc above) */
int (*update_fn)(char* val, char* prev, char **err); /* Optional function to apply new value at runtime (generic doc above) */
int convert_empty_to_null; /* Boolean indicating if empty strings should
be stored as a NULL value. */
} stringConfigData;
typedef struct enumConfigData {
int *config; /* The pointer to the server config this value is stored in */
configEnum *enum_value; /* The underlying enum type this data represents */
const int default_value; /* The default value of the config on rewrite */
int (*is_valid_fn)(int val, char **err); /* Optional function to check validity of new value (generic doc above) */
int (*update_fn)(int val, int prev, char **err); /* Optional function to apply new value at runtime (generic doc above) */
} enumConfigData;
typedef enum numericType {
NUMERIC_TYPE_INT,
NUMERIC_TYPE_UINT,
NUMERIC_TYPE_LONG,
NUMERIC_TYPE_ULONG,
NUMERIC_TYPE_LONG_LONG,
NUMERIC_TYPE_ULONG_LONG,
NUMERIC_TYPE_SIZE_T,
NUMERIC_TYPE_SSIZE_T,
NUMERIC_TYPE_OFF_T,
NUMERIC_TYPE_TIME_T,
} numericType;
typedef struct numericConfigData {
union {
int *i;
unsigned int *ui;
long *l;
unsigned long *ul;
long long *ll;
unsigned long long *ull;
size_t *st;
ssize_t *sst;
off_t *ot;
time_t *tt;
} config; /* The pointer to the numeric config this value is stored in */
int is_memory; /* Indicates if this value can be loaded as a memory value */
numericType numeric_type; /* An enum indicating the type of this value */
long long lower_bound; /* The lower bound of this numeric value */
long long upper_bound; /* The upper bound of this numeric value */
const long long default_value; /* The default value of the config on rewrite */
int (*is_valid_fn)(long long val, char **err); /* Optional function to check validity of new value (generic doc above) */
int (*update_fn)(long long val, long long prev, char **err); /* Optional function to apply new value at runtime (generic doc above) */
} numericConfigData;
typedef union typeData {
boolConfigData yesno;
stringConfigData string;
enumConfigData enumd;
numericConfigData numeric;
} typeData;
typedef struct typeInterface {
/* Called on server start, to init the server with default value */
void (*init)(typeData data);
/* Called on server start, should return 1 on success, 0 on error and should set err */
int (*load)(typeData data, sds *argc, int argv, char **err);
/* Called on CONFIG SET, returns 1 on success, 0 on error */
int (*set)(typeData data, sds value, char **err);
/* Called on CONFIG GET, required to add output to the client */
void (*get)(client *c, typeData data);
/* Called on CONFIG REWRITE, required to rewrite the config state */
void (*rewrite)(typeData data, const char *name, struct rewriteConfigState *state);
} typeInterface;
typedef struct standardConfig {
const char *name; /* The user visible name of this config */
const char *alias; /* An alias that can also be used for this config */
const int modifiable; /* Can this value be updated by CONFIG SET? */
typeInterface interface; /* The function pointers that define the type interface */
typeData data; /* The type specific data exposed used by the interface */
} standardConfig;
standardConfig configs[];
/*-----------------------------------------------------------------------------
* Enum access functions
*----------------------------------------------------------------------------*/
/* Get enum value from name. If there is no match INT_MIN is returned. */
int configEnumGetValue(configEnum *ce, char *name) {
while(ce->name != NULL) {
if (!strcasecmp(ce->name,name)) return ce->val;
ce++;
}
return INT_MIN;
}
/* Get enum name from value. If no match is found NULL is returned. */
const char *configEnumGetName(configEnum *ce, int val) {
while(ce->name != NULL) {
if (ce->val == val) return ce->name;
ce++;
}
return NULL;
}
/* Wrapper for configEnumGetName() returning "unknown" instead of NULL if
* there is no match. */
const char *configEnumGetNameOrUnknown(configEnum *ce, int val) {
const char *name = configEnumGetName(ce,val);
return name ? name : "unknown";
}
/* Used for INFO generation. */
const char *evictPolicyToString(void) {
return configEnumGetNameOrUnknown(maxmemory_policy_enum,server.maxmemory_policy);
}
/*-----------------------------------------------------------------------------
* Config file parsing
*----------------------------------------------------------------------------*/
int yesnotoi(char *s) {
if (!strcasecmp(s,"yes")) return 1;
else if (!strcasecmp(s,"no")) return 0;
else return -1;
}
void appendServerSaveParams(time_t seconds, int changes) {
server.saveparams = zrealloc(server.saveparams,sizeof(struct saveparam)*(server.saveparamslen+1));
server.saveparams[server.saveparamslen].seconds = seconds;
server.saveparams[server.saveparamslen].changes = changes;
server.saveparamslen++;
}
void resetServerSaveParams(void) {
zfree(server.saveparams);
server.saveparams = NULL;
server.saveparamslen = 0;
}
void queueLoadModule(sds path, sds *argv, int argc) {
int i;
struct moduleLoadQueueEntry *loadmod;
loadmod = zmalloc(sizeof(struct moduleLoadQueueEntry));
loadmod->argv = zmalloc(sizeof(robj*)*argc);
loadmod->path = sdsnew(path);
loadmod->argc = argc;
for (i = 0; i < argc; i++) {
loadmod->argv[i] = createRawStringObject(argv[i],sdslen(argv[i]));
}
listAddNodeTail(server.loadmodule_queue,loadmod);
}
void initConfigValues() {
for (standardConfig *config = configs; config->name != NULL; config++) {
config->interface.init(config->data);
}
}
void loadServerConfigFromString(char *config) {
char *err = NULL;
int linenum = 0, totlines, i;
int slaveof_linenum = 0;
sds *lines;
lines = sdssplitlen(config,strlen(config),"\n",1,&totlines);
for (i = 0; i < totlines; i++) {
sds *argv;
int argc;
linenum = i+1;
lines[i] = sdstrim(lines[i]," \t\r\n");
/* Skip comments and blank lines */
if (lines[i][0] == '#' || lines[i][0] == '\0') continue;
/* Split into arguments */
argv = sdssplitargs(lines[i],&argc);
if (argv == NULL) {
err = "Unbalanced quotes in configuration line";
goto loaderr;
}
/* Skip this line if the resulting command vector is empty. */
if (argc == 0) {
sdsfreesplitres(argv,argc);
continue;
}
sdstolower(argv[0]);
/* Iterate the configs that are standard */
int match = 0;
for (standardConfig *config = configs; config->name != NULL; config++) {
if ((!strcasecmp(argv[0],config->name) ||
(config->alias && !strcasecmp(argv[0],config->alias))))
{
if (!config->interface.load(config->data, argv, argc, &err)) {
goto loaderr;
}
match = 1;
break;
}
}
if (match) {
sdsfreesplitres(argv,argc);
continue;
}
/* Execute config directives */
if (!strcasecmp(argv[0],"bind") && argc >= 2) {
int j, addresses = argc-1;
if (addresses > CONFIG_BINDADDR_MAX) {
err = "Too many bind addresses specified"; goto loaderr;
}
for (j = 0; j < addresses; j++)
server.bindaddr[j] = zstrdup(argv[j+1]);
server.bindaddr_count = addresses;
} else if (!strcasecmp(argv[0],"unixsocketperm") && argc == 2) {
errno = 0;
server.unixsocketperm = (mode_t)strtol(argv[1], NULL, 8);
if (errno || server.unixsocketperm > 0777) {
err = "Invalid socket file permissions"; goto loaderr;
}
} else if (!strcasecmp(argv[0],"save")) {
if (argc == 3) {
int seconds = atoi(argv[1]);
int changes = atoi(argv[2]);
if (seconds < 1 || changes < 0) {
err = "Invalid save parameters"; goto loaderr;
}
appendServerSaveParams(seconds,changes);
} else if (argc == 2 && !strcasecmp(argv[1],"")) {
resetServerSaveParams();
}
} else if (!strcasecmp(argv[0],"dir") && argc == 2) {
if (chdir(argv[1]) == -1) {
serverLog(LL_WARNING,"Can't chdir to '%s': %s",
argv[1], strerror(errno));
exit(1);
}
} else if (!strcasecmp(argv[0],"logfile") && argc == 2) {
FILE *logfp;
zfree(server.logfile);
server.logfile = zstrdup(argv[1]);
if (server.logfile[0] != '\0') {
/* Test if we are able to open the file. The server will not
* be able to abort just for this problem later... */
logfp = fopen(server.logfile,"a");
if (logfp == NULL) {
err = sdscatprintf(sdsempty(),
"Can't open the log file: %s", strerror(errno));
goto loaderr;
}
fclose(logfp);
}
} else if (!strcasecmp(argv[0],"include") && argc == 2) {
loadServerConfig(argv[1],NULL);
} else if ((!strcasecmp(argv[0],"client-query-buffer-limit")) && argc == 2) {
server.client_max_querybuf_len = memtoll(argv[1],NULL);
} else if ((!strcasecmp(argv[0],"slaveof") ||
!strcasecmp(argv[0],"replicaof")) && argc == 3) {
slaveof_linenum = linenum;
server.masterhost = sdsnew(argv[1]);
server.masterport = atoi(argv[2]);
server.repl_state = REPL_STATE_CONNECT;
} else if (!strcasecmp(argv[0],"requirepass") && argc == 2) {
if (strlen(argv[1]) > CONFIG_AUTHPASS_MAX_LEN) {
err = "Password is longer than CONFIG_AUTHPASS_MAX_LEN";
goto loaderr;
}
/* The old "requirepass" directive just translates to setting
* a password to the default user. */
ACLSetUser(DefaultUser,"resetpass",-1);
sds aclop = sdscatprintf(sdsempty(),">%s",argv[1]);
ACLSetUser(DefaultUser,aclop,sdslen(aclop));
sdsfree(aclop);
} else if (!strcasecmp(argv[0],"list-max-ziplist-entries") && argc == 2){
/* DEAD OPTION */
} else if (!strcasecmp(argv[0],"list-max-ziplist-value") && argc == 2) {
/* DEAD OPTION */
} else if (!strcasecmp(argv[0],"rename-command") && argc == 3) {
struct redisCommand *cmd = lookupCommand(argv[1]);
int retval;
if (!cmd) {
err = "No such command in rename-command";
goto loaderr;
}
/* If the target command name is the empty string we just
* remove it from the command table. */
retval = dictDelete(server.commands, argv[1]);
serverAssert(retval == DICT_OK);
/* Otherwise we re-add the command under a different name. */
if (sdslen(argv[2]) != 0) {
sds copy = sdsdup(argv[2]);
retval = dictAdd(server.commands, copy, cmd);
if (retval != DICT_OK) {
sdsfree(copy);
err = "Target command name already exists"; goto loaderr;
}
}
} else if (!strcasecmp(argv[0],"cluster-config-file") && argc == 2) {
zfree(server.cluster_configfile);
server.cluster_configfile = zstrdup(argv[1]);
} else if (!strcasecmp(argv[0],"client-output-buffer-limit") &&
argc == 5)
{
int class = getClientTypeByName(argv[1]);
unsigned long long hard, soft;
int soft_seconds;
if (class == -1 || class == CLIENT_TYPE_MASTER) {
err = "Unrecognized client limit class: the user specified "
"an invalid one, or 'master' which has no buffer limits.";
goto loaderr;
}
hard = memtoll(argv[2],NULL);
soft = memtoll(argv[3],NULL);
soft_seconds = atoi(argv[4]);
if (soft_seconds < 0) {
err = "Negative number of seconds in soft limit is invalid";
goto loaderr;
}
server.client_obuf_limits[class].hard_limit_bytes = hard;
server.client_obuf_limits[class].soft_limit_bytes = soft;
server.client_obuf_limits[class].soft_limit_seconds = soft_seconds;
} else if (!strcasecmp(argv[0],"notify-keyspace-events") && argc == 2) {
int flags = keyspaceEventsStringToFlags(argv[1]);
if (flags == -1) {
err = "Invalid event class character. Use 'g$lshzxeA'.";
goto loaderr;
}
server.notify_keyspace_events = flags;
} else if (!strcasecmp(argv[0],"user") && argc >= 2) {
int argc_err;
if (ACLAppendUserForLoading(argv,argc,&argc_err) == C_ERR) {
char buf[1024];
char *errmsg = ACLSetUserStringError();
snprintf(buf,sizeof(buf),"Error in user declaration '%s': %s",
argv[argc_err],errmsg);
err = buf;
goto loaderr;
}
} else if (!strcasecmp(argv[0],"loadmodule") && argc >= 2) {
queueLoadModule(argv[1],&argv[2],argc-2);
} else if (!strcasecmp(argv[0],"sentinel")) {
/* argc == 1 is handled by main() as we need to enter the sentinel
* mode ASAP. */
if (argc != 1) {
if (!server.sentinel_mode) {
err = "sentinel directive while not in sentinel mode";
goto loaderr;
}
err = sentinelHandleConfiguration(argv+1,argc-1);
if (err) goto loaderr;
}
} else {
err = "Bad directive or wrong number of arguments"; goto loaderr;
}
sdsfreesplitres(argv,argc);
}
/* Sanity checks. */
if (server.cluster_enabled && server.masterhost) {
linenum = slaveof_linenum;
i = linenum-1;
err = "replicaof directive not allowed in cluster mode";
goto loaderr;
}
sdsfreesplitres(lines,totlines);
return;
loaderr:
fprintf(stderr, "\n*** FATAL CONFIG FILE ERROR ***\n");
fprintf(stderr, "Reading the configuration file, at line %d\n", linenum);
fprintf(stderr, ">>> '%s'\n", lines[i]);
fprintf(stderr, "%s\n", err);
exit(1);
}
/* Load the server configuration from the specified filename.
* The function appends the additional configuration directives stored
* in the 'options' string to the config file before loading.
*
* Both filename and options can be NULL, in such a case are considered
* empty. This way loadServerConfig can be used to just load a file or
* just load a string. */
void loadServerConfig(char *filename, char *options) {
sds config = sdsempty();
char buf[CONFIG_MAX_LINE+1];
/* Load the file content */
if (filename) {
FILE *fp;
if (filename[0] == '-' && filename[1] == '\0') {
fp = stdin;
} else {
if ((fp = fopen(filename,"r")) == NULL) {
serverLog(LL_WARNING,
"Fatal error, can't open config file '%s'", filename);
exit(1);
}
}
while(fgets(buf,CONFIG_MAX_LINE+1,fp) != NULL)
config = sdscat(config,buf);
if (fp != stdin) fclose(fp);
}
/* Append the additional options */
if (options) {
config = sdscat(config,"\n");
config = sdscat(config,options);
}
loadServerConfigFromString(config);
sdsfree(config);
}
/*-----------------------------------------------------------------------------
* CONFIG SET implementation
*----------------------------------------------------------------------------*/
#define config_set_bool_field(_name,_var) \
} else if (!strcasecmp(c->argv[2]->ptr,_name)) { \
int yn = yesnotoi(o->ptr); \
if (yn == -1) goto badfmt; \
_var = yn;
#define config_set_numerical_field(_name,_var,min,max) \
} else if (!strcasecmp(c->argv[2]->ptr,_name)) { \
if (getLongLongFromObject(o,&ll) == C_ERR) goto badfmt; \
if (min != LLONG_MIN && ll < min) goto badfmt; \
if (max != LLONG_MAX && ll > max) goto badfmt; \
_var = ll;
#define config_set_memory_field(_name,_var) \
} else if (!strcasecmp(c->argv[2]->ptr,_name)) { \
ll = memtoll(o->ptr,&err); \
if (err || ll < 0) goto badfmt; \
_var = ll;
#define config_set_special_field(_name) \
} else if (!strcasecmp(c->argv[2]->ptr,_name)) {
#define config_set_special_field_with_alias(_name1,_name2) \
} else if (!strcasecmp(c->argv[2]->ptr,_name1) || \
!strcasecmp(c->argv[2]->ptr,_name2)) {
#define config_set_else } else
void configSetCommand(client *c) {
robj *o;
long long ll;
int err;
char *errstr = NULL;
serverAssertWithInfo(c,c->argv[2],sdsEncodedObject(c->argv[2]));
serverAssertWithInfo(c,c->argv[3],sdsEncodedObject(c->argv[3]));
o = c->argv[3];
/* Iterate the configs that are standard */
for (standardConfig *config = configs; config->name != NULL; config++) {
if(config->modifiable && (!strcasecmp(c->argv[2]->ptr,config->name) ||
(config->alias && !strcasecmp(c->argv[2]->ptr,config->alias))))
{
if (!config->interface.set(config->data,o->ptr, &errstr)) {
goto badfmt;
}
addReply(c,shared.ok);
return;
}
}
if (0) { /* this starts the config_set macros else-if chain. */
/* Special fields that can't be handled with general macros. */
config_set_special_field("requirepass") {
if (sdslen(o->ptr) > CONFIG_AUTHPASS_MAX_LEN) goto badfmt;
/* The old "requirepass" directive just translates to setting
* a password to the default user. */
ACLSetUser(DefaultUser,"resetpass",-1);
sds aclop = sdscatprintf(sdsempty(),">%s",(char*)o->ptr);
ACLSetUser(DefaultUser,aclop,sdslen(aclop));
sdsfree(aclop);
} config_set_special_field("save") {
int vlen, j;
sds *v = sdssplitlen(o->ptr,sdslen(o->ptr)," ",1,&vlen);
/* Perform sanity check before setting the new config:
* - Even number of args
* - Seconds >= 1, changes >= 0 */
if (vlen & 1) {
sdsfreesplitres(v,vlen);
goto badfmt;
}
for (j = 0; j < vlen; j++) {
char *eptr;
long val;
val = strtoll(v[j], &eptr, 10);
if (eptr[0] != '\0' ||
((j & 1) == 0 && val < 1) ||
((j & 1) == 1 && val < 0)) {
sdsfreesplitres(v,vlen);
goto badfmt;
}
}
/* Finally set the new config */
resetServerSaveParams();
for (j = 0; j < vlen; j += 2) {
time_t seconds;
int changes;
seconds = strtoll(v[j],NULL,10);
changes = strtoll(v[j+1],NULL,10);
appendServerSaveParams(seconds, changes);
}
sdsfreesplitres(v,vlen);
} config_set_special_field("dir") {
if (chdir((char*)o->ptr) == -1) {
addReplyErrorFormat(c,"Changing directory: %s", strerror(errno));
return;
}
} config_set_special_field("client-output-buffer-limit") {
int vlen, j;
sds *v = sdssplitlen(o->ptr,sdslen(o->ptr)," ",1,&vlen);
/* We need a multiple of 4: <class> <hard> <soft> <soft_seconds> */
if (vlen % 4) {
sdsfreesplitres(v,vlen);
goto badfmt;
}
/* Sanity check of single arguments, so that we either refuse the
* whole configuration string or accept it all, even if a single
* error in a single client class is present. */
for (j = 0; j < vlen; j++) {
long val;
if ((j % 4) == 0) {
int class = getClientTypeByName(v[j]);
if (class == -1 || class == CLIENT_TYPE_MASTER) {
sdsfreesplitres(v,vlen);
goto badfmt;
}
} else {
val = memtoll(v[j], &err);
if (err || val < 0) {
sdsfreesplitres(v,vlen);
goto badfmt;
}
}
}
/* Finally set the new config */
for (j = 0; j < vlen; j += 4) {
int class;
unsigned long long hard, soft;
int soft_seconds;
class = getClientTypeByName(v[j]);
hard = memtoll(v[j+1],NULL);
soft = memtoll(v[j+2],NULL);
soft_seconds = strtoll(v[j+3],NULL,10);
server.client_obuf_limits[class].hard_limit_bytes = hard;
server.client_obuf_limits[class].soft_limit_bytes = soft;
server.client_obuf_limits[class].soft_limit_seconds = soft_seconds;
}
sdsfreesplitres(v,vlen);
} config_set_special_field("notify-keyspace-events") {
int flags = keyspaceEventsStringToFlags(o->ptr);
if (flags == -1) goto badfmt;
server.notify_keyspace_events = flags;
/* Numerical fields.
* config_set_numerical_field(name,var,min,max) */
} config_set_numerical_field(
"watchdog-period",ll,0,INT_MAX) {
if (ll)
enableWatchdog(ll);
else
disableWatchdog();
/* Memory fields.
* config_set_memory_field(name,var) */
} config_set_memory_field(
"client-query-buffer-limit",server.client_max_querybuf_len) {
/* Everyhing else is an error... */
} config_set_else {
addReplyErrorFormat(c,"Unsupported CONFIG parameter: %s",
(char*)c->argv[2]->ptr);
return;
}
/* On success we just return a generic OK for all the options. */
addReply(c,shared.ok);
return;
badfmt: /* Bad format errors */
if (errstr) {
addReplyErrorFormat(c,"Invalid argument '%s' for CONFIG SET '%s' - %s",
(char*)o->ptr,
(char*)c->argv[2]->ptr,
errstr);
} else {
addReplyErrorFormat(c,"Invalid argument '%s' for CONFIG SET '%s'",
(char*)o->ptr,
(char*)c->argv[2]->ptr);
}
}
/*-----------------------------------------------------------------------------
* CONFIG GET implementation
*----------------------------------------------------------------------------*/
#define config_get_string_field(_name,_var) do { \
if (stringmatch(pattern,_name,1)) { \
addReplyBulkCString(c,_name); \
addReplyBulkCString(c,_var ? _var : ""); \
matches++; \
} \
} while(0);
#define config_get_bool_field(_name,_var) do { \
if (stringmatch(pattern,_name,1)) { \
addReplyBulkCString(c,_name); \
addReplyBulkCString(c,_var ? "yes" : "no"); \
matches++; \
} \
} while(0);
#define config_get_numerical_field(_name,_var) do { \
if (stringmatch(pattern,_name,1)) { \
ll2string(buf,sizeof(buf),_var); \
addReplyBulkCString(c,_name); \
addReplyBulkCString(c,buf); \
matches++; \
} \
} while(0);
void configGetCommand(client *c) {
robj *o = c->argv[2];
void *replylen = addReplyDeferredLen(c);
char *pattern = o->ptr;
char buf[128];
int matches = 0;
serverAssertWithInfo(c,o,sdsEncodedObject(o));
/* Iterate the configs that are standard */
for (standardConfig *config = configs; config->name != NULL; config++) {
if (stringmatch(pattern,config->name,1)) {
addReplyBulkCString(c,config->name);
config->interface.get(c,config->data);
matches++;
}
if (config->alias && stringmatch(pattern,config->alias,1)) {
addReplyBulkCString(c,config->alias);
config->interface.get(c,config->data);
matches++;
}
}
/* String values */
config_get_string_field("logfile",server.logfile);
/* Numerical values */
config_get_numerical_field("client-query-buffer-limit",server.client_max_querybuf_len);
config_get_numerical_field("watchdog-period",server.watchdog_period);
/* Everything we can't handle with macros follows. */
if (stringmatch(pattern,"dir",1)) {
char buf[1024];
if (getcwd(buf,sizeof(buf)) == NULL)
buf[0] = '\0';
addReplyBulkCString(c,"dir");
addReplyBulkCString(c,buf);
matches++;
}
if (stringmatch(pattern,"save",1)) {
sds buf = sdsempty();
int j;
for (j = 0; j < server.saveparamslen; j++) {
buf = sdscatprintf(buf,"%jd %d",
(intmax_t)server.saveparams[j].seconds,
server.saveparams[j].changes);
if (j != server.saveparamslen-1)
buf = sdscatlen(buf," ",1);
}
addReplyBulkCString(c,"save");
addReplyBulkCString(c,buf);
sdsfree(buf);
matches++;
}
if (stringmatch(pattern,"client-output-buffer-limit",1)) {
sds buf = sdsempty();
int j;
for (j = 0; j < CLIENT_TYPE_OBUF_COUNT; j++) {
buf = sdscatprintf(buf,"%s %llu %llu %ld",
getClientTypeName(j),
server.client_obuf_limits[j].hard_limit_bytes,
server.client_obuf_limits[j].soft_limit_bytes,
(long) server.client_obuf_limits[j].soft_limit_seconds);
if (j != CLIENT_TYPE_OBUF_COUNT-1)
buf = sdscatlen(buf," ",1);
}
addReplyBulkCString(c,"client-output-buffer-limit");
addReplyBulkCString(c,buf);
sdsfree(buf);
matches++;
}
if (stringmatch(pattern,"unixsocketperm",1)) {
char buf[32];
snprintf(buf,sizeof(buf),"%o",server.unixsocketperm);
addReplyBulkCString(c,"unixsocketperm");
addReplyBulkCString(c,buf);
matches++;
}
if (stringmatch(pattern,"slaveof",1) ||
stringmatch(pattern,"replicaof",1))
{
char *optname = stringmatch(pattern,"slaveof",1) ?
"slaveof" : "replicaof";
char buf[256];
addReplyBulkCString(c,optname);
if (server.masterhost)
snprintf(buf,sizeof(buf),"%s %d",
server.masterhost, server.masterport);
else
buf[0] = '\0';
addReplyBulkCString(c,buf);
matches++;
}
if (stringmatch(pattern,"notify-keyspace-events",1)) {
sds flags = keyspaceEventsFlagsToString(server.notify_keyspace_events);
addReplyBulkCString(c,"notify-keyspace-events");
addReplyBulkSds(c,flags);
matches++;
}
if (stringmatch(pattern,"bind",1)) {
sds aux = sdsjoin(server.bindaddr,server.bindaddr_count," ");
addReplyBulkCString(c,"bind");
addReplyBulkCString(c,aux);
sdsfree(aux);
matches++;
}
if (stringmatch(pattern,"requirepass",1)) {
addReplyBulkCString(c,"requirepass");
sds password = ACLDefaultUserFirstPassword();
if (password) {
addReplyBulkCBuffer(c,password,sdslen(password));
} else {
addReplyBulkCString(c,"");
}
matches++;
}
setDeferredMapLen(c,replylen,matches);
}
/*-----------------------------------------------------------------------------
* CONFIG REWRITE implementation
*----------------------------------------------------------------------------*/
#define REDIS_CONFIG_REWRITE_SIGNATURE "# Generated by CONFIG REWRITE"
/* We use the following dictionary type to store where a configuration
* option is mentioned in the old configuration file, so it's
* like "maxmemory" -> list of line numbers (first line is zero). */
uint64_t dictSdsCaseHash(const void *key);
int dictSdsKeyCaseCompare(void *privdata, const void *key1, const void *key2);
void dictSdsDestructor(void *privdata, void *val);
void dictListDestructor(void *privdata, void *val);
/* Sentinel config rewriting is implemented inside sentinel.c by
* rewriteConfigSentinelOption(). */
void rewriteConfigSentinelOption(struct rewriteConfigState *state);
dictType optionToLineDictType = {
dictSdsCaseHash, /* hash function */
NULL, /* key dup */
NULL, /* val dup */
dictSdsKeyCaseCompare, /* key compare */
dictSdsDestructor, /* key destructor */
dictListDestructor /* val destructor */
};
dictType optionSetDictType = {
dictSdsCaseHash, /* hash function */
NULL, /* key dup */
NULL, /* val dup */
dictSdsKeyCaseCompare, /* key compare */
dictSdsDestructor, /* key destructor */
NULL /* val destructor */
};
/* The config rewrite state. */
struct rewriteConfigState {
dict *option_to_line; /* Option -> list of config file lines map */
dict *rewritten; /* Dictionary of already processed options */
int numlines; /* Number of lines in current config */
sds *lines; /* Current lines as an array of sds strings */
int has_tail; /* True if we already added directives that were
not present in the original config file. */
};
/* Append the new line to the current configuration state. */
void rewriteConfigAppendLine(struct rewriteConfigState *state, sds line) {
state->lines = zrealloc(state->lines, sizeof(char*) * (state->numlines+1));
state->lines[state->numlines++] = line;
}
/* Populate the option -> list of line numbers map. */
void rewriteConfigAddLineNumberToOption(struct rewriteConfigState *state, sds option, int linenum) {
list *l = dictFetchValue(state->option_to_line,option);
if (l == NULL) {
l = listCreate();
dictAdd(state->option_to_line,sdsdup(option),l);
}
listAddNodeTail(l,(void*)(long)linenum);
}
/* Add the specified option to the set of processed options.
* This is useful as only unused lines of processed options will be blanked
* in the config file, while options the rewrite process does not understand
* remain untouched. */
void rewriteConfigMarkAsProcessed(struct rewriteConfigState *state, const char *option) {
sds opt = sdsnew(option);
if (dictAdd(state->rewritten,opt,NULL) != DICT_OK) sdsfree(opt);
}
/* Read the old file, split it into lines to populate a newly created
* config rewrite state, and return it to the caller.
*
* If it is impossible to read the old file, NULL is returned.
* If the old file does not exist at all, an empty state is returned. */
struct rewriteConfigState *rewriteConfigReadOldFile(char *path) {
FILE *fp = fopen(path,"r");
if (fp == NULL && errno != ENOENT) return NULL;
char buf[CONFIG_MAX_LINE+1];
int linenum = -1;
struct rewriteConfigState *state = zmalloc(sizeof(*state));
state->option_to_line = dictCreate(&optionToLineDictType,NULL);
state->rewritten = dictCreate(&optionSetDictType,NULL);
state->numlines = 0;
state->lines = NULL;
state->has_tail = 0;
if (fp == NULL) return state;
/* Read the old file line by line, populate the state. */
while(fgets(buf,CONFIG_MAX_LINE+1,fp) != NULL) {
int argc;
sds *argv;
sds line = sdstrim(sdsnew(buf),"\r\n\t ");
linenum++; /* Zero based, so we init at -1 */
/* Handle comments and empty lines. */
if (line[0] == '#' || line[0] == '\0') {
if (!state->has_tail && !strcmp(line,REDIS_CONFIG_REWRITE_SIGNATURE))
state->has_tail = 1;
rewriteConfigAppendLine(state,line);
continue;
}
/* Not a comment, split into arguments. */
argv = sdssplitargs(line,&argc);
if (argv == NULL) {
/* Apparently the line is unparsable for some reason, for
* instance it may have unbalanced quotes. Load it as a
* comment. */
sds aux = sdsnew("# ??? ");
aux = sdscatsds(aux,line);
sdsfree(line);
rewriteConfigAppendLine(state,aux);
continue;
}
sdstolower(argv[0]); /* We only want lowercase config directives. */
/* Now we populate the state according to the content of this line.
* Append the line and populate the option -> line numbers map. */
rewriteConfigAppendLine(state,line);
/* Translate options using the word "slave" to the corresponding name
* "replica", before adding such option to the config name -> lines
* mapping. */
char *p = strstr(argv[0],"slave");
if (p) {
sds alt = sdsempty();
alt = sdscatlen(alt,argv[0],p-argv[0]);;
alt = sdscatlen(alt,"replica",7);
alt = sdscatlen(alt,p+5,strlen(p+5));
sdsfree(argv[0]);
argv[0] = alt;
}
rewriteConfigAddLineNumberToOption(state,argv[0],linenum);
sdsfreesplitres(argv,argc);
}
fclose(fp);
return state;
}
/* Rewrite the specified configuration option with the new "line".
* It progressively uses lines of the file that were already used for the same
* configuration option in the old version of the file, removing that line from
* the map of options -> line numbers.
*
* If there are lines associated with a given configuration option and
* "force" is non-zero, the line is appended to the configuration file.
* Usually "force" is true when an option has not its default value, so it
* must be rewritten even if not present previously.
*
* The first time a line is appended into a configuration file, a comment
* is added to show that starting from that point the config file was generated
* by CONFIG REWRITE.
*
* "line" is either used, or freed, so the caller does not need to free it
* in any way. */
void rewriteConfigRewriteLine(struct rewriteConfigState *state, const char *option, sds line, int force) {
sds o = sdsnew(option);
list *l = dictFetchValue(state->option_to_line,o);
rewriteConfigMarkAsProcessed(state,option);
if (!l && !force) {
/* Option not used previously, and we are not forced to use it. */
sdsfree(line);
sdsfree(o);
return;
}
if (l) {
listNode *ln = listFirst(l);
int linenum = (long) ln->value;
/* There are still lines in the old configuration file we can reuse
* for this option. Replace the line with the new one. */
listDelNode(l,ln);
if (listLength(l) == 0) dictDelete(state->option_to_line,o);
sdsfree(state->lines[linenum]);
state->lines[linenum] = line;
} else {
/* Append a new line. */
if (!state->has_tail) {
rewriteConfigAppendLine(state,
sdsnew(REDIS_CONFIG_REWRITE_SIGNATURE));
state->has_tail = 1;
}
rewriteConfigAppendLine(state,line);
}
sdsfree(o);
}
/* Write the long long 'bytes' value as a string in a way that is parsable
* inside redis.conf. If possible uses the GB, MB, KB notation. */
int rewriteConfigFormatMemory(char *buf, size_t len, long long bytes) {
int gb = 1024*1024*1024;
int mb = 1024*1024;
int kb = 1024;
if (bytes && (bytes % gb) == 0) {
return snprintf(buf,len,"%lldgb",bytes/gb);
} else if (bytes && (bytes % mb) == 0) {
return snprintf(buf,len,"%lldmb",bytes/mb);
} else if (bytes && (bytes % kb) == 0) {
return snprintf(buf,len,"%lldkb",bytes/kb);
} else {
return snprintf(buf,len,"%lld",bytes);
}
}
/* Rewrite a simple "option-name <bytes>" configuration option. */
void rewriteConfigBytesOption(struct rewriteConfigState *state, const char *option, long long value, long long defvalue) {
char buf[64];
int force = value != defvalue;
sds line;
rewriteConfigFormatMemory(buf,sizeof(buf),value);
line = sdscatprintf(sdsempty(),"%s %s",option,buf);
rewriteConfigRewriteLine(state,option,line,force);
}
/* Rewrite a yes/no option. */
void rewriteConfigYesNoOption(struct rewriteConfigState *state, const char *option, int value, int defvalue) {
int force = value != defvalue;
sds line = sdscatprintf(sdsempty(),"%s %s",option,
value ? "yes" : "no");
rewriteConfigRewriteLine(state,option,line,force);
}
/* Rewrite a string option. */
void rewriteConfigStringOption(struct rewriteConfigState *state, const char *option, char *value, const char *defvalue) {
int force = 1;
sds line;
/* String options set to NULL need to be not present at all in the
* configuration file to be set to NULL again at the next reboot. */
if (value == NULL) {
rewriteConfigMarkAsProcessed(state,option);
return;
}
/* Set force to zero if the value is set to its default. */
if (defvalue && strcmp(value,defvalue) == 0) force = 0;
line = sdsnew(option);
line = sdscatlen(line, " ", 1);
line = sdscatrepr(line, value, strlen(value));
rewriteConfigRewriteLine(state,option,line,force);
}
/* Rewrite a numerical (long long range) option. */
void rewriteConfigNumericalOption(struct rewriteConfigState *state, const char *option, long long value, long long defvalue) {
int force = value != defvalue;
sds line = sdscatprintf(sdsempty(),"%s %lld",option,value);
rewriteConfigRewriteLine(state,option,line,force);
}
/* Rewrite a octal option. */
void rewriteConfigOctalOption(struct rewriteConfigState *state, char *option, int value, int defvalue) {
int force = value != defvalue;
sds line = sdscatprintf(sdsempty(),"%s %o",option,value);
rewriteConfigRewriteLine(state,option,line,force);
}
/* Rewrite an enumeration option. It takes as usually state and option name,
* and in addition the enumeration array and the default value for the
* option. */
void rewriteConfigEnumOption(struct rewriteConfigState *state, const char *option, int value, configEnum *ce, int defval) {
sds line;
const char *name = configEnumGetNameOrUnknown(ce,value);
int force = value != defval;
line = sdscatprintf(sdsempty(),"%s %s",option,name);
rewriteConfigRewriteLine(state,option,line,force);
}
/* Rewrite the save option. */
void rewriteConfigSaveOption(struct rewriteConfigState *state) {
int j;
sds line;
/* Note that if there are no save parameters at all, all the current
* config line with "save" will be detected as orphaned and deleted,
* resulting into no RDB persistence as expected. */
for (j = 0; j < server.saveparamslen; j++) {
line = sdscatprintf(sdsempty(),"save %ld %d",
(long) server.saveparams[j].seconds, server.saveparams[j].changes);
rewriteConfigRewriteLine(state,"save",line,1);
}
/* Mark "save" as processed in case server.saveparamslen is zero. */
rewriteConfigMarkAsProcessed(state,"save");
}
/* Rewrite the user option. */
void rewriteConfigUserOption(struct rewriteConfigState *state) {
/* If there is a user file defined we just mark this configuration
* directive as processed, so that all the lines containing users
* inside the config file gets discarded. */
if (server.acl_filename[0] != '\0') {
rewriteConfigMarkAsProcessed(state,"user");
return;
}
/* Otherwise scan the list of users and rewrite every line. Note that
* in case the list here is empty, the effect will just be to comment
* all the users directive inside the config file. */
raxIterator ri;
raxStart(&ri,Users);
raxSeek(&ri,"^",NULL,0);
while(raxNext(&ri)) {
user *u = ri.data;
sds line = sdsnew("user ");
line = sdscatsds(line,u->name);
line = sdscatlen(line," ",1);
sds descr = ACLDescribeUser(u);
line = sdscatsds(line,descr);
sdsfree(descr);
rewriteConfigRewriteLine(state,"user",line,1);
}
raxStop(&ri);
/* Mark "user" as processed in case there are no defined users. */
rewriteConfigMarkAsProcessed(state,"user");
}
/* Rewrite the dir option, always using absolute paths.*/
void rewriteConfigDirOption(struct rewriteConfigState *state) {
char cwd[1024];
if (getcwd(cwd,sizeof(cwd)) == NULL) {
rewriteConfigMarkAsProcessed(state,"dir");
return; /* no rewrite on error. */
}
rewriteConfigStringOption(state,"dir",cwd,NULL);
}
/* Rewrite the slaveof option. */
void rewriteConfigSlaveofOption(struct rewriteConfigState *state, char *option) {
sds line;
/* If this is a master, we want all the slaveof config options
* in the file to be removed. Note that if this is a cluster instance
* we don't want a slaveof directive inside redis.conf. */
if (server.cluster_enabled || server.masterhost == NULL) {
rewriteConfigMarkAsProcessed(state,option);
return;
}
line = sdscatprintf(sdsempty(),"%s %s %d", option,
server.masterhost, server.masterport);
rewriteConfigRewriteLine(state,option,line,1);
}
/* Rewrite the notify-keyspace-events option. */
void rewriteConfigNotifykeyspaceeventsOption(struct rewriteConfigState *state) {
int force = server.notify_keyspace_events != 0;
char *option = "notify-keyspace-events";
sds line, flags;
flags = keyspaceEventsFlagsToString(server.notify_keyspace_events);
line = sdsnew(option);
line = sdscatlen(line, " ", 1);
line = sdscatrepr(line, flags, sdslen(flags));
sdsfree(flags);
rewriteConfigRewriteLine(state,option,line,force);
}
/* Rewrite the client-output-buffer-limit option. */
void rewriteConfigClientoutputbufferlimitOption(struct rewriteConfigState *state) {
int j;
char *option = "client-output-buffer-limit";
for (j = 0; j < CLIENT_TYPE_OBUF_COUNT; j++) {
int force = (server.client_obuf_limits[j].hard_limit_bytes !=
clientBufferLimitsDefaults[j].hard_limit_bytes) ||
(server.client_obuf_limits[j].soft_limit_bytes !=
clientBufferLimitsDefaults[j].soft_limit_bytes) ||
(server.client_obuf_limits[j].soft_limit_seconds !=
clientBufferLimitsDefaults[j].soft_limit_seconds);
sds line;
char hard[64], soft[64];
rewriteConfigFormatMemory(hard,sizeof(hard),
server.client_obuf_limits[j].hard_limit_bytes);
rewriteConfigFormatMemory(soft,sizeof(soft),
server.client_obuf_limits[j].soft_limit_bytes);
char *typename = getClientTypeName(j);
if (!strcmp(typename,"slave")) typename = "replica";
line = sdscatprintf(sdsempty(),"%s %s %s %s %ld",
option, typename, hard, soft,
(long) server.client_obuf_limits[j].soft_limit_seconds);
rewriteConfigRewriteLine(state,option,line,force);
}
}
/* Rewrite the bind option. */
void rewriteConfigBindOption(struct rewriteConfigState *state) {
int force = 1;
sds line, addresses;
char *option = "bind";
/* Nothing to rewrite if we don't have bind addresses. */
if (server.bindaddr_count == 0) {
rewriteConfigMarkAsProcessed(state,option);
return;
}
/* Rewrite as bind <addr1> <addr2> ... <addrN> */
addresses = sdsjoin(server.bindaddr,server.bindaddr_count," ");
line = sdsnew(option);
line = sdscatlen(line, " ", 1);
line = sdscatsds(line, addresses);
sdsfree(addresses);
rewriteConfigRewriteLine(state,option,line,force);
}
/* Rewrite the requirepass option. */
void rewriteConfigRequirepassOption(struct rewriteConfigState *state, char *option) {
int force = 1;
sds line;
sds password = ACLDefaultUserFirstPassword();
/* If there is no password set, we don't want the requirepass option
* to be present in the configuration at all. */
if (password == NULL) {
rewriteConfigMarkAsProcessed(state,option);
return;
}
line = sdsnew(option);
line = sdscatlen(line, " ", 1);
line = sdscatsds(line, password);
rewriteConfigRewriteLine(state,option,line,force);
}
/* Glue together the configuration lines in the current configuration
* rewrite state into a single string, stripping multiple empty lines. */
sds rewriteConfigGetContentFromState(struct rewriteConfigState *state) {
sds content = sdsempty();
int j, was_empty = 0;
for (j = 0; j < state->numlines; j++) {
/* Every cluster of empty lines is turned into a single empty line. */
if (sdslen(state->lines[j]) == 0) {
if (was_empty) continue;
was_empty = 1;
} else {
was_empty = 0;
}
content = sdscatsds(content,state->lines[j]);
content = sdscatlen(content,"\n",1);
}
return content;
}
/* Free the configuration rewrite state. */
void rewriteConfigReleaseState(struct rewriteConfigState *state) {
sdsfreesplitres(state->lines,state->numlines);
dictRelease(state->option_to_line);
dictRelease(state->rewritten);
zfree(state);
}
/* At the end of the rewrite process the state contains the remaining
* map between "option name" => "lines in the original config file".
* Lines used by the rewrite process were removed by the function
* rewriteConfigRewriteLine(), all the other lines are "orphaned" and
* should be replaced by empty lines.
*
* This function does just this, iterating all the option names and
* blanking all the lines still associated. */
void rewriteConfigRemoveOrphaned(struct rewriteConfigState *state) {
dictIterator *di = dictGetIterator(state->option_to_line);
dictEntry *de;
while((de = dictNext(di)) != NULL) {
list *l = dictGetVal(de);
sds option = dictGetKey(de);
/* Don't blank lines about options the rewrite process
* don't understand. */
if (dictFind(state->rewritten,option) == NULL) {
serverLog(LL_DEBUG,"Not rewritten option: %s", option);
continue;
}
while(listLength(l)) {
listNode *ln = listFirst(l);
int linenum = (long) ln->value;
sdsfree(state->lines[linenum]);
state->lines[linenum] = sdsempty();
listDelNode(l,ln);
}
}
dictReleaseIterator(di);
}
/* This function overwrites the old configuration file with the new content.
*
* 1) The old file length is obtained.
* 2) If the new content is smaller, padding is added.
* 3) A single write(2) call is used to replace the content of the file.
* 4) Later the file is truncated to the length of the new content.
*
* This way we are sure the file is left in a consistent state even if the
* process is stopped between any of the four operations.
*
* The function returns 0 on success, otherwise -1 is returned and errno
* set accordingly. */
int rewriteConfigOverwriteFile(char *configfile, sds content) {
int retval = 0;
int fd = open(configfile,O_RDWR|O_CREAT,0644);
int content_size = sdslen(content), padding = 0;
struct stat sb;
sds content_padded;
/* 1) Open the old file (or create a new one if it does not
* exist), get the size. */
if (fd == -1) return -1; /* errno set by open(). */
if (fstat(fd,&sb) == -1) {
close(fd);
return -1; /* errno set by fstat(). */
}
/* 2) Pad the content at least match the old file size. */
content_padded = sdsdup(content);
if (content_size < sb.st_size) {
/* If the old file was bigger, pad the content with
* a newline plus as many "#" chars as required. */
padding = sb.st_size - content_size;
content_padded = sdsgrowzero(content_padded,sb.st_size);
content_padded[content_size] = '\n';
memset(content_padded+content_size+1,'#',padding-1);
}
/* 3) Write the new content using a single write(2). */
if (write(fd,content_padded,strlen(content_padded)) == -1) {
retval = -1;
goto cleanup;
}
/* 4) Truncate the file to the right length if we used padding. */
if (padding) {
if (ftruncate(fd,content_size) == -1) {
/* Non critical error... */
}
}
cleanup:
sdsfree(content_padded);
close(fd);
return retval;
}
/* Rewrite the configuration file at "path".
* If the configuration file already exists, we try at best to retain comments
* and overall structure.
*
* Configuration parameters that are at their default value, unless already
* explicitly included in the old configuration file, are not rewritten.
*
* On error -1 is returned and errno is set accordingly, otherwise 0. */
int rewriteConfig(char *path) {
struct rewriteConfigState *state;
sds newcontent;
int retval;
/* Step 1: read the old config into our rewrite state. */
if ((state = rewriteConfigReadOldFile(path)) == NULL) return -1;
/* Step 2: rewrite every single option, replacing or appending it inside
* the rewrite state. */
/* Iterate the configs that are standard */
for (standardConfig *config = configs; config->name != NULL; config++) {
config->interface.rewrite(config->data, config->name, state);
}
rewriteConfigBindOption(state);
rewriteConfigOctalOption(state,"unixsocketperm",server.unixsocketperm,CONFIG_DEFAULT_UNIX_SOCKET_PERM);
rewriteConfigStringOption(state,"logfile",server.logfile,CONFIG_DEFAULT_LOGFILE);
rewriteConfigSaveOption(state);
rewriteConfigUserOption(state);
rewriteConfigDirOption(state);
rewriteConfigSlaveofOption(state,"replicaof");
rewriteConfigRequirepassOption(state,"requirepass");
rewriteConfigBytesOption(state,"client-query-buffer-limit",server.client_max_querybuf_len,PROTO_MAX_QUERYBUF_LEN);
rewriteConfigStringOption(state,"cluster-config-file",server.cluster_configfile,CONFIG_DEFAULT_CLUSTER_CONFIG_FILE);
rewriteConfigNotifykeyspaceeventsOption(state);
rewriteConfigClientoutputbufferlimitOption(state);
/* Rewrite Sentinel config if in Sentinel mode. */
if (server.sentinel_mode) rewriteConfigSentinelOption(state);
/* Step 3: remove all the orphaned lines in the old file, that is, lines
* that were used by a config option and are no longer used, like in case
* of multiple "save" options or duplicated options. */
rewriteConfigRemoveOrphaned(state);
/* Step 4: generate a new configuration file from the modified state
* and write it into the original file. */
newcontent = rewriteConfigGetContentFromState(state);
retval = rewriteConfigOverwriteFile(server.configfile,newcontent);
sdsfree(newcontent);
rewriteConfigReleaseState(state);
return retval;
}
/*-----------------------------------------------------------------------------
* Configs that fit one of the major types and require no special handling
*----------------------------------------------------------------------------*/
#define LOADBUF_SIZE 256
static char loadbuf[LOADBUF_SIZE];
#define MODIFIABLE_CONFIG 1
#define IMMUTABLE_CONFIG 0
#define embedCommonConfig(config_name, config_alias, is_modifiable) \
.name = (config_name), \
.alias = (config_alias), \
.modifiable = (is_modifiable),
#define embedConfigInterface(initfn, loadfn, setfn, getfn, rewritefn) .interface = { \
.init = (initfn), \
.load = (loadfn), \
.set = (setfn), \
.get = (getfn), \
.rewrite = (rewritefn) \
},
/* What follows is the generic config types that are supported. To add a new
* config with one of these types, add it to the standardConfig table with
* the creation macro for each type.
*
* Each type contains the following:
* * A function defining how to load this type on startup.
* * A function defining how to update this type on CONFIG SET.
* * A function defining how to serialize this type on CONFIG SET.
* * A function defining how to rewrite this type on CONFIG REWRITE.
* * A Macro defining how to create this type.
*/
/* Bool Configs */
static void boolConfigInit(typeData data) {
*data.yesno.config = data.yesno.default_value;
}
static int boolConfigLoad(typeData data, sds *argv, int argc, char **err) {
int yn;
if (argc != 2) {
*err = "wrong number of arguments";
return 0;
}
if ((yn = yesnotoi(argv[1])) == -1) {
*err = "argument must be 'yes' or 'no'";
return 0;
}
if (data.yesno.is_valid_fn && !data.yesno.is_valid_fn(yn, err))
return 0;
*data.yesno.config = yn;
return 1;
}
static int boolConfigSet(typeData data, sds value, char **err) {
int yn = yesnotoi(value);
if (yn == -1) return 0;
if (data.yesno.is_valid_fn && !data.yesno.is_valid_fn(yn, err))
return 0;
int prev = *(data.yesno.config);
*(data.yesno.config) = yn;
if (data.yesno.update_fn && !data.yesno.update_fn(yn, prev, err)) {
*(data.yesno.config) = prev;
return 0;
}
return 1;
}
static void boolConfigGet(client *c, typeData data) {
addReplyBulkCString(c, *data.yesno.config ? "yes" : "no");
}
static void boolConfigRewrite(typeData data, const char *name, struct rewriteConfigState *state) {
rewriteConfigYesNoOption(state, name,*(data.yesno.config), data.yesno.default_value);
}
#define createBoolConfig(name, alias, modifiable, config_addr, default, is_valid, update) { \
embedCommonConfig(name, alias, modifiable) \
embedConfigInterface(boolConfigInit, boolConfigLoad, boolConfigSet, boolConfigGet, boolConfigRewrite) \
.data.yesno = { \
.config = &(config_addr), \
.default_value = (default), \
.is_valid_fn = (is_valid), \
.update_fn = (update), \
} \
}
/* String Configs */
static void stringConfigInit(typeData data) {
if (data.string.convert_empty_to_null) {
*data.string.config = data.string.default_value ? zstrdup(data.string.default_value) : NULL;
} else {
*data.string.config = zstrdup(data.string.default_value);
}
}
static int stringConfigLoad(typeData data, sds *argv, int argc, char **err) {
if (argc != 2) {
*err = "wrong number of arguments";
return 0;
}
if (data.string.is_valid_fn && !data.string.is_valid_fn(argv[1], err))
return 0;
zfree(*data.string.config);
if (data.string.convert_empty_to_null) {
*data.string.config = argv[1][0] ? zstrdup(argv[1]) : NULL;
} else {
*data.string.config = zstrdup(argv[1]);
}
return 1;
}
static int stringConfigSet(typeData data, sds value, char **err) {
if (data.string.is_valid_fn && !data.string.is_valid_fn(value, err))
return 0;
char *prev = *data.string.config;
if (data.string.convert_empty_to_null) {
*data.string.config = value[0] ? zstrdup(value) : NULL;
} else {
*data.string.config = zstrdup(value);
}
if (data.string.update_fn && !data.string.update_fn(*data.string.config, prev, err)) {
zfree(*data.string.config);
*data.string.config = prev;
return 0;
}
zfree(prev);
return 1;
}
static void stringConfigGet(client *c, typeData data) {
addReplyBulkCString(c, *data.string.config ? *data.string.config : "");
}
static void stringConfigRewrite(typeData data, const char *name, struct rewriteConfigState *state) {
rewriteConfigStringOption(state, name,*(data.string.config), data.string.default_value);
}
#define ALLOW_EMPTY_STRING 0
#define EMPTY_STRING_IS_NULL 1
#define createStringConfig(name, alias, modifiable, empty_to_null, config_addr, default, is_valid, update) { \
embedCommonConfig(name, alias, modifiable) \
embedConfigInterface(stringConfigInit, stringConfigLoad, stringConfigSet, stringConfigGet, stringConfigRewrite) \
.data.string = { \
.config = &(config_addr), \
.default_value = (default), \
.is_valid_fn = (is_valid), \
.update_fn = (update), \
.convert_empty_to_null = (empty_to_null), \
} \
}
/* Enum configs */
static void configEnumInit(typeData data) {
*data.enumd.config = data.enumd.default_value;
}
static int configEnumLoad(typeData data, sds *argv, int argc, char **err) {
if (argc != 2) {
*err = "wrong number of arguments";
return 0;
}
int enumval = configEnumGetValue(data.enumd.enum_value, argv[1]);
if (enumval == INT_MIN) {
sds enumerr = sdsnew("argument must be one of the following: ");
configEnum *enumNode = data.enumd.enum_value;
while(enumNode->name != NULL) {
enumerr = sdscatlen(enumerr, enumNode->name, strlen(enumNode->name));
enumerr = sdscatlen(enumerr, ", ", 2);
enumNode++;
}
enumerr[sdslen(enumerr) - 2] = '\0';
/* Make sure we don't overrun the fixed buffer */
enumerr[LOADBUF_SIZE - 1] = '\0';
strncpy(loadbuf, enumerr, LOADBUF_SIZE);
sdsfree(enumerr);
*err = loadbuf;
return 0;
}
if (data.enumd.is_valid_fn && !data.enumd.is_valid_fn(enumval, err))
return 0;
*(data.enumd.config) = enumval;
return 1;
}
static int configEnumSet(typeData data, sds value, char **err) {
int enumval = configEnumGetValue(data.enumd.enum_value, value);
if (enumval == INT_MIN) return 0;
if (data.enumd.is_valid_fn && !data.enumd.is_valid_fn(enumval, err))
return 0;
int prev = *(data.enumd.config);
*(data.enumd.config) = enumval;
if (data.enumd.update_fn && !data.enumd.update_fn(enumval, prev, err)) {
*(data.enumd.config) = prev;
return 0;
}
return 1;
}
static void configEnumGet(client *c, typeData data) {
addReplyBulkCString(c, configEnumGetNameOrUnknown(data.enumd.enum_value,*data.enumd.config));
}
static void configEnumRewrite(typeData data, const char *name, struct rewriteConfigState *state) {
rewriteConfigEnumOption(state, name,*(data.enumd.config), data.enumd.enum_value, data.enumd.default_value);
}
#define createEnumConfig(name, alias, modifiable, enum, config_addr, default, is_valid, update) { \
embedCommonConfig(name, alias, modifiable) \
embedConfigInterface(configEnumInit, configEnumLoad, configEnumSet, configEnumGet, configEnumRewrite) \
.data.enumd = { \
.config = &(config_addr), \
.default_value = (default), \
.is_valid_fn = (is_valid), \
.update_fn = (update), \
.enum_value = (enum), \
} \
}
/* Gets a 'long long val' and sets it into the union, using a macro to get
* compile time type check. */
#define SET_NUMERIC_TYPE(val) \
if (data.numeric.numeric_type == NUMERIC_TYPE_INT) { \
*(data.numeric.config.i) = (int) val; \
} else if (data.numeric.numeric_type == NUMERIC_TYPE_UINT) { \
*(data.numeric.config.ui) = (unsigned int) val; \
} else if (data.numeric.numeric_type == NUMERIC_TYPE_LONG) { \
*(data.numeric.config.l) = (long) val; \
} else if (data.numeric.numeric_type == NUMERIC_TYPE_ULONG) { \
*(data.numeric.config.ul) = (unsigned long) val; \
} else if (data.numeric.numeric_type == NUMERIC_TYPE_LONG_LONG) { \
*(data.numeric.config.ll) = (long long) val; \
} else if (data.numeric.numeric_type == NUMERIC_TYPE_ULONG_LONG) { \
*(data.numeric.config.ull) = (unsigned long long) val; \
} else if (data.numeric.numeric_type == NUMERIC_TYPE_SIZE_T) { \
*(data.numeric.config.st) = (size_t) val; \
} else if (data.numeric.numeric_type == NUMERIC_TYPE_SSIZE_T) { \
*(data.numeric.config.sst) = (ssize_t) val; \
} else if (data.numeric.numeric_type == NUMERIC_TYPE_OFF_T) { \
*(data.numeric.config.ot) = (off_t) val; \
} else if (data.numeric.numeric_type == NUMERIC_TYPE_TIME_T) { \
*(data.numeric.config.tt) = (time_t) val; \
}
/* Gets a 'long long val' and sets it with the value from the union, using a
* macro to get compile time type check. */
#define GET_NUMERIC_TYPE(val) \
if (data.numeric.numeric_type == NUMERIC_TYPE_INT) { \
val = *(data.numeric.config.i); \
} else if (data.numeric.numeric_type == NUMERIC_TYPE_UINT) { \
val = *(data.numeric.config.ui); \
} else if (data.numeric.numeric_type == NUMERIC_TYPE_LONG) { \
val = *(data.numeric.config.l); \
} else if (data.numeric.numeric_type == NUMERIC_TYPE_ULONG) { \
val = *(data.numeric.config.ul); \
} else if (data.numeric.numeric_type == NUMERIC_TYPE_LONG_LONG) { \
val = *(data.numeric.config.ll); \
} else if (data.numeric.numeric_type == NUMERIC_TYPE_ULONG_LONG) { \
val = *(data.numeric.config.ull); \
} else if (data.numeric.numeric_type == NUMERIC_TYPE_SIZE_T) { \
val = *(data.numeric.config.st); \
} else if (data.numeric.numeric_type == NUMERIC_TYPE_SSIZE_T) { \
val = *(data.numeric.config.sst); \
} else if (data.numeric.numeric_type == NUMERIC_TYPE_OFF_T) { \
val = *(data.numeric.config.ot); \
} else if (data.numeric.numeric_type == NUMERIC_TYPE_TIME_T) { \
val = *(data.numeric.config.tt); \
}
/* Numeric configs */
static void numericConfigInit(typeData data) {
SET_NUMERIC_TYPE(data.numeric.default_value)
}
static int numericBoundaryCheck(typeData data, long long ll, char **err) {
if (data.numeric.numeric_type == NUMERIC_TYPE_ULONG_LONG ||
data.numeric.numeric_type == NUMERIC_TYPE_UINT ||
data.numeric.numeric_type == NUMERIC_TYPE_SIZE_T) {
/* Boundary check for unsigned types */
unsigned long long ull = ll;
unsigned long long upper_bound = data.numeric.upper_bound;
unsigned long long lower_bound = data.numeric.lower_bound;
if (ull > upper_bound || ull < lower_bound) {
snprintf(loadbuf, LOADBUF_SIZE,
"argument must be between %llu and %llu inclusive",
lower_bound,
upper_bound);
*err = loadbuf;
return 0;
}
} else {
/* Boundary check for signed types */
if (ll > data.numeric.upper_bound || ll < data.numeric.lower_bound) {
snprintf(loadbuf, LOADBUF_SIZE,
"argument must be between %lld and %lld inclusive",
data.numeric.lower_bound,
data.numeric.upper_bound);
*err = loadbuf;
return 0;
}
}
return 1;
}
static int numericConfigLoad(typeData data, sds *argv, int argc, char **err) {
long long ll;
if (argc != 2) {
*err = "wrong number of arguments";
return 0;
}
if (data.numeric.is_memory) {
int memerr;
ll = memtoll(argv[1], &memerr);
if (memerr || ll < 0) {
*err = "argument must be a memory value";
return 0;
}
} else {
if (!string2ll(argv[1], sdslen(argv[1]),&ll)) {
*err = "argument couldn't be parsed into an integer" ;
return 0;
}
}
if (!numericBoundaryCheck(data, ll, err))
return 0;
if (data.numeric.is_valid_fn && !data.numeric.is_valid_fn(ll, err))
return 0;
SET_NUMERIC_TYPE(ll)
return 1;
}
static int numericConfigSet(typeData data, sds value, char **err) {
long long ll, prev = 0;
if (data.numeric.is_memory) {
int memerr;
ll = memtoll(value, &memerr);
if (memerr || ll < 0) return 0;
} else {
if (!string2ll(value, sdslen(value),&ll)) return 0;
}
if (!numericBoundaryCheck(data, ll, err))
return 0;
if (data.numeric.is_valid_fn && !data.numeric.is_valid_fn(ll, err))
return 0;
GET_NUMERIC_TYPE(prev)
SET_NUMERIC_TYPE(ll)
if (data.numeric.update_fn && !data.numeric.update_fn(ll, prev, err)) {
SET_NUMERIC_TYPE(prev)
return 0;
}
return 1;
}
static void numericConfigGet(client *c, typeData data) {
char buf[128];
long long value = 0;
GET_NUMERIC_TYPE(value)
ll2string(buf, sizeof(buf), value);
addReplyBulkCString(c, buf);
}
static void numericConfigRewrite(typeData data, const char *name, struct rewriteConfigState *state) {
long long value = 0;
GET_NUMERIC_TYPE(value)
if (data.numeric.is_memory) {
rewriteConfigBytesOption(state, name, value, data.numeric.default_value);
} else {
rewriteConfigNumericalOption(state, name, value, data.numeric.default_value);
}
}
#define INTEGER_CONFIG 0
#define MEMORY_CONFIG 1
#define embedCommonNumericalConfig(name, alias, modifiable, lower, upper, config_addr, default, memory, is_valid, update) { \
embedCommonConfig(name, alias, modifiable) \
embedConfigInterface(numericConfigInit, numericConfigLoad, numericConfigSet, numericConfigGet, numericConfigRewrite) \
.data.numeric = { \
.lower_bound = (lower), \
.upper_bound = (upper), \
.default_value = (default), \
.is_valid_fn = (is_valid), \
.update_fn = (update), \
.is_memory = (memory),
#define createIntConfig(name, alias, modifiable, lower, upper, config_addr, default, memory, is_valid, update) \
embedCommonNumericalConfig(name, alias, modifiable, lower, upper, config_addr, default, memory, is_valid, update) \
.numeric_type = NUMERIC_TYPE_INT, \
.config.i = &(config_addr) \
} \
}
#define createUIntConfig(name, alias, modifiable, lower, upper, config_addr, default, memory, is_valid, update) \
embedCommonNumericalConfig(name, alias, modifiable, lower, upper, config_addr, default, memory, is_valid, update) \
.numeric_type = NUMERIC_TYPE_UINT, \
.config.ui = &(config_addr) \
} \
}
#define createLongConfig(name, alias, modifiable, lower, upper, config_addr, default, memory, is_valid, update) \
embedCommonNumericalConfig(name, alias, modifiable, lower, upper, config_addr, default, memory, is_valid, update) \
.numeric_type = NUMERIC_TYPE_LONG, \
.config.l = &(config_addr) \
} \
}
#define createULongConfig(name, alias, modifiable, lower, upper, config_addr, default, memory, is_valid, update) \
embedCommonNumericalConfig(name, alias, modifiable, lower, upper, config_addr, default, memory, is_valid, update) \
.numeric_type = NUMERIC_TYPE_ULONG, \
.config.ul = &(config_addr) \
} \
}
#define createLongLongConfig(name, alias, modifiable, lower, upper, config_addr, default, memory, is_valid, update) \
embedCommonNumericalConfig(name, alias, modifiable, lower, upper, config_addr, default, memory, is_valid, update) \
.numeric_type = NUMERIC_TYPE_LONG_LONG, \
.config.ll = &(config_addr) \
} \
}
#define createULongLongConfig(name, alias, modifiable, lower, upper, config_addr, default, memory, is_valid, update) \
embedCommonNumericalConfig(name, alias, modifiable, lower, upper, config_addr, default, memory, is_valid, update) \
.numeric_type = NUMERIC_TYPE_ULONG_LONG, \
.config.ull = &(config_addr) \
} \
}
#define createSizeTConfig(name, alias, modifiable, lower, upper, config_addr, default, memory, is_valid, update) \
embedCommonNumericalConfig(name, alias, modifiable, lower, upper, config_addr, default, memory, is_valid, update) \
.numeric_type = NUMERIC_TYPE_SIZE_T, \
.config.st = &(config_addr) \
} \
}
#define createSSizeTConfig(name, alias, modifiable, lower, upper, config_addr, default, memory, is_valid, update) \
embedCommonNumericalConfig(name, alias, modifiable, lower, upper, config_addr, default, memory, is_valid, update) \
.numeric_type = NUMERIC_TYPE_SSIZE_T, \
.config.sst = &(config_addr) \
} \
}
#define createTimeTConfig(name, alias, modifiable, lower, upper, config_addr, default, memory, is_valid, update) \
embedCommonNumericalConfig(name, alias, modifiable, lower, upper, config_addr, default, memory, is_valid, update) \
.numeric_type = NUMERIC_TYPE_TIME_T, \
.config.tt = &(config_addr) \
} \
}
#define createOffTConfig(name, alias, modifiable, lower, upper, config_addr, default, memory, is_valid, update) \
embedCommonNumericalConfig(name, alias, modifiable, lower, upper, config_addr, default, memory, is_valid, update) \
.numeric_type = NUMERIC_TYPE_OFF_T, \
.config.ot = &(config_addr) \
} \
}
static int isValidActiveDefrag(int val, char **err) {
#ifndef HAVE_DEFRAG
if (val) {
*err = "Active defragmentation cannot be enabled: it "
"requires a Redis server compiled with a modified Jemalloc "
"like the one shipped by default with the Redis source "
"distribution";
return 0;
}
#else
UNUSED(val);
UNUSED(err);
#endif
return 1;
}
static int isValidDBfilename(char *val, char **err) {
if (!pathIsBaseName(val)) {
*err = "dbfilename can't be a path, just a filename";
return 0;
}
return 1;
}
static int isValidAOFfilename(char *val, char **err) {
if (!pathIsBaseName(val)) {
*err = "appendfilename can't be a path, just a filename";
return 0;
}
return 1;
}
static int updateHZ(long long val, long long prev, char **err) {
UNUSED(prev);
UNUSED(err);
/* Hz is more an hint from the user, so we accept values out of range
* but cap them to reasonable values. */
server.config_hz = val;
if (server.config_hz < CONFIG_MIN_HZ) server.config_hz = CONFIG_MIN_HZ;
if (server.config_hz > CONFIG_MAX_HZ) server.config_hz = CONFIG_MAX_HZ;
server.hz = server.config_hz;
return 1;
}
static int updateJemallocBgThread(int val, int prev, char **err) {
UNUSED(prev);
UNUSED(err);
set_jemalloc_bg_thread(val);
return 1;
}
static int updateReplBacklogSize(long long val, long long prev, char **err) {
/* resizeReplicationBacklog sets server.repl_backlog_size, and relies on
* being able to tell when the size changes, so restore prev becore calling it. */
UNUSED(err);
server.repl_backlog_size = prev;
resizeReplicationBacklog(val);
return 1;
}
static int updateMaxmemory(long long val, long long prev, char **err) {
UNUSED(prev);
UNUSED(err);
if (val) {
if ((unsigned long long)val < zmalloc_used_memory()) {
serverLog(LL_WARNING,"WARNING: the new maxmemory value set via CONFIG SET is smaller than the current memory usage. This will result in key eviction and/or the inability to accept new write commands depending on the maxmemory-policy.");
}
freeMemoryIfNeededAndSafe();
}
return 1;
}
static int updateGoodSlaves(long long val, long long prev, char **err) {
UNUSED(val);
UNUSED(prev);
UNUSED(err);
refreshGoodSlavesCount();
return 1;
}
static int updateAppendonly(int val, int prev, char **err) {
UNUSED(prev);
if (val == 0 && server.aof_state != AOF_OFF) {
stopAppendOnly();
} else if (val && server.aof_state == AOF_OFF) {
if (startAppendOnly() == C_ERR) {
*err = "Unable to turn on AOF. Check server logs.";
return 0;
}
}
return 1;
}
static int updateMaxclients(long long val, long long prev, char **err) {
/* Try to check if the OS is capable of supporting so many FDs. */
if (val > prev) {
adjustOpenFilesLimit();
if (server.maxclients != val) {
static char msg[128];
sprintf(msg, "The operating system is not able to handle the specified number of clients, try with %d", server.maxclients);
*err = msg;
if (server.maxclients > prev) {
server.maxclients = prev;
adjustOpenFilesLimit();
}
return 0;
}
if ((unsigned int) aeGetSetSize(server.el) <
server.maxclients + CONFIG_FDSET_INCR)
{
if (aeResizeSetSize(server.el,
server.maxclients + CONFIG_FDSET_INCR) == AE_ERR)
{
*err = "The event loop API used by Redis is not able to handle the specified number of clients";
return 0;
}
}
}
return 1;
}
#ifdef USE_OPENSSL
static int updateTlsCfg(char *val, char *prev, char **err) {
UNUSED(val);
UNUSED(prev);
UNUSED(err);
if (tlsConfigure(&server.tls_ctx_config) == C_ERR) {
*err = "Unable to configure tls-cert-file. Check server logs.";
return 0;
}
return 1;
}
static int updateTlsCfgBool(int val, int prev, char **err) {
UNUSED(val);
UNUSED(prev);
return updateTlsCfg(NULL, NULL, err);
}
#endif /* USE_OPENSSL */
standardConfig configs[] = {
/* Bool configs */
createBoolConfig("rdbchecksum", NULL, IMMUTABLE_CONFIG, server.rdb_checksum, 1, NULL, NULL),
createBoolConfig("daemonize", NULL, IMMUTABLE_CONFIG, server.daemonize, 0, NULL, NULL),
createBoolConfig("io-threads-do-reads", NULL, IMMUTABLE_CONFIG, server.io_threads_do_reads, 0,NULL, NULL), /* Read + parse from threads? */
createBoolConfig("lua-replicate-commands", NULL, MODIFIABLE_CONFIG, server.lua_always_replicate_commands, 1, NULL, NULL),
createBoolConfig("always-show-logo", NULL, IMMUTABLE_CONFIG, server.always_show_logo, 0, NULL, NULL),
createBoolConfig("protected-mode", NULL, MODIFIABLE_CONFIG, server.protected_mode, 1, NULL, NULL),
createBoolConfig("rdbcompression", NULL, MODIFIABLE_CONFIG, server.rdb_compression, 1, NULL, NULL),
createBoolConfig("activerehashing", NULL, MODIFIABLE_CONFIG, server.activerehashing, 1, NULL, NULL),
createBoolConfig("stop-writes-on-bgsave-error", NULL, MODIFIABLE_CONFIG, server.stop_writes_on_bgsave_err, 1, NULL, NULL),
createBoolConfig("dynamic-hz", NULL, MODIFIABLE_CONFIG, server.dynamic_hz, 1, NULL, NULL), /* Adapt hz to # of clients.*/
createBoolConfig("lazyfree-lazy-eviction", NULL, MODIFIABLE_CONFIG, server.lazyfree_lazy_eviction, 0, NULL, NULL),
createBoolConfig("lazyfree-lazy-expire", NULL, MODIFIABLE_CONFIG, server.lazyfree_lazy_expire, 0, NULL, NULL),
createBoolConfig("lazyfree-lazy-server-del", NULL, MODIFIABLE_CONFIG, server.lazyfree_lazy_server_del, 0, NULL, NULL),
createBoolConfig("repl-disable-tcp-nodelay", NULL, MODIFIABLE_CONFIG, server.repl_disable_tcp_nodelay, 0, NULL, NULL),
createBoolConfig("repl-diskless-sync", NULL, MODIFIABLE_CONFIG, server.repl_diskless_sync, 0, NULL, NULL),
createBoolConfig("gopher-enabled", NULL, MODIFIABLE_CONFIG, server.gopher_enabled, 0, NULL, NULL),
createBoolConfig("aof-rewrite-incremental-fsync", NULL, MODIFIABLE_CONFIG, server.aof_rewrite_incremental_fsync, 1, NULL, NULL),
createBoolConfig("no-appendfsync-on-rewrite", NULL, MODIFIABLE_CONFIG, server.aof_no_fsync_on_rewrite, 0, NULL, NULL),
createBoolConfig("cluster-require-full-coverage", NULL, MODIFIABLE_CONFIG, server.cluster_require_full_coverage, 1, NULL, NULL),
createBoolConfig("rdb-save-incremental-fsync", NULL, MODIFIABLE_CONFIG, server.rdb_save_incremental_fsync, 1, NULL, NULL),
createBoolConfig("aof-load-truncated", NULL, MODIFIABLE_CONFIG, server.aof_load_truncated, 1, NULL, NULL),
createBoolConfig("aof-use-rdb-preamble", NULL, MODIFIABLE_CONFIG, server.aof_use_rdb_preamble, 1, NULL, NULL),
createBoolConfig("cluster-replica-no-failover", "cluster-slave-no-failover", MODIFIABLE_CONFIG, server.cluster_slave_no_failover, 0, NULL, NULL), /* Failover by default. */
createBoolConfig("replica-lazy-flush", "slave-lazy-flush", MODIFIABLE_CONFIG, server.repl_slave_lazy_flush, 0, NULL, NULL),
createBoolConfig("replica-serve-stale-data", "slave-serve-stale-data", MODIFIABLE_CONFIG, server.repl_serve_stale_data, 1, NULL, NULL),
createBoolConfig("replica-read-only", "slave-read-only", MODIFIABLE_CONFIG, server.repl_slave_ro, 1, NULL, NULL),
createBoolConfig("replica-ignore-maxmemory", "slave-ignore-maxmemory", MODIFIABLE_CONFIG, server.repl_slave_ignore_maxmemory, 1, NULL, NULL),
createBoolConfig("jemalloc-bg-thread", NULL, MODIFIABLE_CONFIG, server.jemalloc_bg_thread, 1, NULL, updateJemallocBgThread),
createBoolConfig("activedefrag", NULL, MODIFIABLE_CONFIG, server.active_defrag_enabled, 0, isValidActiveDefrag, NULL),
createBoolConfig("syslog-enabled", NULL, IMMUTABLE_CONFIG, server.syslog_enabled, 0, NULL, NULL),
createBoolConfig("cluster-enabled", NULL, IMMUTABLE_CONFIG, server.cluster_enabled, 0, NULL, NULL),
createBoolConfig("appendonly", NULL, MODIFIABLE_CONFIG, server.aof_enabled, 0, NULL, updateAppendonly),
createBoolConfig("cluster-allow-reads-when-down", NULL, MODIFIABLE_CONFIG, server.cluster_allow_reads_when_down, 0, NULL, NULL),
/* String Configs */
createStringConfig("aclfile", NULL, IMMUTABLE_CONFIG, ALLOW_EMPTY_STRING, server.acl_filename, "", NULL, NULL),
createStringConfig("unixsocket", NULL, IMMUTABLE_CONFIG, EMPTY_STRING_IS_NULL, server.unixsocket, NULL, NULL, NULL),
createStringConfig("pidfile", NULL, IMMUTABLE_CONFIG, EMPTY_STRING_IS_NULL, server.pidfile, NULL, NULL, NULL),
createStringConfig("replica-announce-ip", "slave-announce-ip", MODIFIABLE_CONFIG, EMPTY_STRING_IS_NULL, server.slave_announce_ip, NULL, NULL, NULL),
createStringConfig("masteruser", NULL, MODIFIABLE_CONFIG, EMPTY_STRING_IS_NULL, server.masteruser, NULL, NULL, NULL),
createStringConfig("masterauth", NULL, MODIFIABLE_CONFIG, EMPTY_STRING_IS_NULL, server.masterauth, NULL, NULL, NULL),
createStringConfig("cluster-announce-ip", NULL, MODIFIABLE_CONFIG, EMPTY_STRING_IS_NULL, server.cluster_announce_ip, NULL, NULL, NULL),
createStringConfig("syslog-ident", NULL, IMMUTABLE_CONFIG, ALLOW_EMPTY_STRING, server.syslog_ident, "redis", NULL, NULL),
createStringConfig("dbfilename", NULL, MODIFIABLE_CONFIG, ALLOW_EMPTY_STRING, server.rdb_filename, "dump.rdb", isValidDBfilename, NULL),
createStringConfig("appendfilename", NULL, IMMUTABLE_CONFIG, ALLOW_EMPTY_STRING, server.aof_filename, "appendonly.aof", isValidAOFfilename, NULL),
/* Enum Configs */
createEnumConfig("supervised", NULL, IMMUTABLE_CONFIG, supervised_mode_enum, server.supervised_mode, SUPERVISED_NONE, NULL, NULL),
createEnumConfig("syslog-facility", NULL, IMMUTABLE_CONFIG, syslog_facility_enum, server.syslog_facility, LOG_LOCAL0, NULL, NULL),
createEnumConfig("repl-diskless-load", NULL, MODIFIABLE_CONFIG, repl_diskless_load_enum, server.repl_diskless_load, REPL_DISKLESS_LOAD_DISABLED, NULL, NULL),
createEnumConfig("loglevel", NULL, MODIFIABLE_CONFIG, loglevel_enum, server.verbosity, LL_NOTICE, NULL, NULL),
createEnumConfig("maxmemory-policy", NULL, MODIFIABLE_CONFIG, maxmemory_policy_enum, server.maxmemory_policy, MAXMEMORY_NO_EVICTION, NULL, NULL),
createEnumConfig("appendfsync", NULL, MODIFIABLE_CONFIG, aof_fsync_enum, server.aof_fsync, AOF_FSYNC_EVERYSEC, NULL, NULL),
/* Integer configs */
createIntConfig("databases", NULL, IMMUTABLE_CONFIG, 1, INT_MAX, server.dbnum, 16, INTEGER_CONFIG, NULL, NULL),
createIntConfig("port", NULL, IMMUTABLE_CONFIG, 0, 65535, server.port, 6379, INTEGER_CONFIG, NULL, NULL), /* TCP port. */
createIntConfig("io-threads", NULL, IMMUTABLE_CONFIG, 1, 128, server.io_threads_num, 1, INTEGER_CONFIG, NULL, NULL), /* Single threaded by default */
createIntConfig("auto-aof-rewrite-percentage", NULL, MODIFIABLE_CONFIG, 0, INT_MAX, server.aof_rewrite_perc, 100, INTEGER_CONFIG, NULL, NULL),
createIntConfig("cluster-replica-validity-factor", "cluster-slave-validity-factor", MODIFIABLE_CONFIG, 0, INT_MAX, server.cluster_slave_validity_factor, 10, INTEGER_CONFIG, NULL, NULL), /* Slave max data age factor. */
createIntConfig("list-max-ziplist-size", NULL, MODIFIABLE_CONFIG, INT_MIN, INT_MAX, server.list_max_ziplist_size, -2, INTEGER_CONFIG, NULL, NULL),
createIntConfig("tcp-keepalive", NULL, MODIFIABLE_CONFIG, 0, INT_MAX, server.tcpkeepalive, 300, INTEGER_CONFIG, NULL, NULL),
createIntConfig("cluster-migration-barrier", NULL, MODIFIABLE_CONFIG, 0, INT_MAX, server.cluster_migration_barrier, 1, INTEGER_CONFIG, NULL, NULL),
createIntConfig("active-defrag-cycle-min", NULL, MODIFIABLE_CONFIG, 1, 99, server.active_defrag_cycle_min, 1, INTEGER_CONFIG, NULL, NULL), /* Default: 1% CPU min (at lower threshold) */
createIntConfig("active-defrag-cycle-max", NULL, MODIFIABLE_CONFIG, 1, 99, server.active_defrag_cycle_max, 25, INTEGER_CONFIG, NULL, NULL), /* Default: 25% CPU max (at upper threshold) */
createIntConfig("active-defrag-threshold-lower", NULL, MODIFIABLE_CONFIG, 0, 1000, server.active_defrag_threshold_lower, 10, INTEGER_CONFIG, NULL, NULL), /* Default: don't defrag when fragmentation is below 10% */
createIntConfig("active-defrag-threshold-upper", NULL, MODIFIABLE_CONFIG, 0, 1000, server.active_defrag_threshold_upper, 100, INTEGER_CONFIG, NULL, NULL), /* Default: maximum defrag force at 100% fragmentation */
createIntConfig("lfu-log-factor", NULL, MODIFIABLE_CONFIG, 0, INT_MAX, server.lfu_log_factor, 10, INTEGER_CONFIG, NULL, NULL),
createIntConfig("lfu-decay-time", NULL, MODIFIABLE_CONFIG, 0, INT_MAX, server.lfu_decay_time, 1, INTEGER_CONFIG, NULL, NULL),
createIntConfig("replica-priority", "slave-priority", MODIFIABLE_CONFIG, 0, INT_MAX, server.slave_priority, 100, INTEGER_CONFIG, NULL, NULL),
createIntConfig("repl-diskless-sync-delay", NULL, MODIFIABLE_CONFIG, 0, INT_MAX, server.repl_diskless_sync_delay, 5, INTEGER_CONFIG, NULL, NULL),
createIntConfig("maxmemory-samples", NULL, MODIFIABLE_CONFIG, 1, INT_MAX, server.maxmemory_samples, 5, INTEGER_CONFIG, NULL, NULL),
createIntConfig("timeout", NULL, MODIFIABLE_CONFIG, 0, INT_MAX, server.maxidletime, 0, INTEGER_CONFIG, NULL, NULL), /* Default client timeout: infinite */
createIntConfig("replica-announce-port", "slave-announce-port", MODIFIABLE_CONFIG, 0, 65535, server.slave_announce_port, 0, INTEGER_CONFIG, NULL, NULL),
createIntConfig("tcp-backlog", NULL, IMMUTABLE_CONFIG, 0, INT_MAX, server.tcp_backlog, 511, INTEGER_CONFIG, NULL, NULL), /* TCP listen backlog. */
createIntConfig("cluster-announce-bus-port", NULL, MODIFIABLE_CONFIG, 0, 65535, server.cluster_announce_bus_port, 0, INTEGER_CONFIG, NULL, NULL), /* Default: Use +10000 offset. */
createIntConfig("cluster-announce-port", NULL, MODIFIABLE_CONFIG, 0, 65535, server.cluster_announce_port, 0, INTEGER_CONFIG, NULL, NULL), /* Use server.port */
createIntConfig("repl-timeout", NULL, MODIFIABLE_CONFIG, 1, INT_MAX, server.repl_timeout, 60, INTEGER_CONFIG, NULL, NULL),
createIntConfig("repl-ping-replica-period", "repl-ping-slave-period", MODIFIABLE_CONFIG, 1, INT_MAX, server.repl_ping_slave_period, 10, INTEGER_CONFIG, NULL, NULL),
createIntConfig("list-compress-depth", NULL, MODIFIABLE_CONFIG, 0, INT_MAX, server.list_compress_depth, 0, INTEGER_CONFIG, NULL, NULL),
createIntConfig("rdb-key-save-delay", NULL, MODIFIABLE_CONFIG, 0, INT_MAX, server.rdb_key_save_delay, 0, INTEGER_CONFIG, NULL, NULL),
createIntConfig("key-load-delay", NULL, MODIFIABLE_CONFIG, 0, INT_MAX, server.key_load_delay, 0, INTEGER_CONFIG, NULL, NULL),
createIntConfig("tracking-table-max-fill", NULL, MODIFIABLE_CONFIG, 0, 100, server.tracking_table_max_fill, 10, INTEGER_CONFIG, NULL, NULL), /* Default: 10% tracking table max fill. */
createIntConfig("active-expire-effort", NULL, MODIFIABLE_CONFIG, 1, 10, server.active_expire_effort, 1, INTEGER_CONFIG, NULL, NULL), /* From 1 to 10. */
createIntConfig("hz", NULL, MODIFIABLE_CONFIG, 0, INT_MAX, server.config_hz, CONFIG_DEFAULT_HZ, INTEGER_CONFIG, NULL, updateHZ),
createIntConfig("min-replicas-to-write", "min-slaves-to-write", MODIFIABLE_CONFIG, 0, INT_MAX, server.repl_min_slaves_to_write, 0, INTEGER_CONFIG, NULL, updateGoodSlaves),
createIntConfig("min-replicas-max-lag", "min-slaves-max-lag", MODIFIABLE_CONFIG, 0, INT_MAX, server.repl_min_slaves_max_lag, 10, INTEGER_CONFIG, NULL, updateGoodSlaves),
/* Unsigned int configs */
createUIntConfig("maxclients", NULL, MODIFIABLE_CONFIG, 1, UINT_MAX, server.maxclients, 10000, INTEGER_CONFIG, NULL, updateMaxclients),
/* Unsigned Long configs */
createULongConfig("active-defrag-max-scan-fields", NULL, MODIFIABLE_CONFIG, 1, LONG_MAX, server.active_defrag_max_scan_fields, 1000, INTEGER_CONFIG, NULL, NULL), /* Default: keys with more than 1000 fields will be processed separately */
createULongConfig("slowlog-max-len", NULL, MODIFIABLE_CONFIG, 0, LONG_MAX, server.slowlog_max_len, 128, INTEGER_CONFIG, NULL, NULL),
/* Long Long configs */
createLongLongConfig("lua-time-limit", NULL, MODIFIABLE_CONFIG, 0, LONG_MAX, server.lua_time_limit, 5000, INTEGER_CONFIG, NULL, NULL),/* milliseconds */
createLongLongConfig("cluster-node-timeout", NULL, MODIFIABLE_CONFIG, 0, LLONG_MAX, server.cluster_node_timeout, 15000, INTEGER_CONFIG, NULL, NULL),
createLongLongConfig("slowlog-log-slower-than", NULL, MODIFIABLE_CONFIG, -1, LLONG_MAX, server.slowlog_log_slower_than, 10000, INTEGER_CONFIG, NULL, NULL),
createLongLongConfig("latency-monitor-threshold", NULL, MODIFIABLE_CONFIG, 0, LLONG_MAX, server.latency_monitor_threshold, 0, INTEGER_CONFIG, NULL, NULL),
createLongLongConfig("proto-max-bulk-len", NULL, MODIFIABLE_CONFIG, 0, LLONG_MAX, server.proto_max_bulk_len, 512ll*1024*1024, MEMORY_CONFIG, NULL, NULL), /* Bulk request max size */
createLongLongConfig("stream-node-max-entries", NULL, MODIFIABLE_CONFIG, 0, LLONG_MAX, server.stream_node_max_entries, 100, INTEGER_CONFIG, NULL, NULL),
createLongLongConfig("repl-backlog-size", NULL, MODIFIABLE_CONFIG, 1, LLONG_MAX, server.repl_backlog_size, 1024*1024, MEMORY_CONFIG, NULL, updateReplBacklogSize), /* Default: 1mb */
/* Unsigned Long Long configs */
createULongLongConfig("maxmemory", NULL, MODIFIABLE_CONFIG, 0, ULLONG_MAX, server.maxmemory, 0, MEMORY_CONFIG, NULL, updateMaxmemory),
/* Size_t configs */
createSizeTConfig("hash-max-ziplist-entries", NULL, MODIFIABLE_CONFIG, 0, LONG_MAX, server.hash_max_ziplist_entries, 512, INTEGER_CONFIG, NULL, NULL),
createSizeTConfig("set-max-intset-entries", NULL, MODIFIABLE_CONFIG, 0, LONG_MAX, server.set_max_intset_entries, 512, INTEGER_CONFIG, NULL, NULL),
createSizeTConfig("zset-max-ziplist-entries", NULL, MODIFIABLE_CONFIG, 0, LONG_MAX, server.zset_max_ziplist_entries, 128, INTEGER_CONFIG, NULL, NULL),
createSizeTConfig("active-defrag-ignore-bytes", NULL, MODIFIABLE_CONFIG, 1, LLONG_MAX, server.active_defrag_ignore_bytes, 100<<20, MEMORY_CONFIG, NULL, NULL), /* Default: don't defrag if frag overhead is below 100mb */
createSizeTConfig("hash-max-ziplist-value", NULL, MODIFIABLE_CONFIG, 0, LONG_MAX, server.hash_max_ziplist_value, 64, MEMORY_CONFIG, NULL, NULL),
createSizeTConfig("stream-node-max-bytes", NULL, MODIFIABLE_CONFIG, 0, LONG_MAX, server.stream_node_max_bytes, 4096, MEMORY_CONFIG, NULL, NULL),
createSizeTConfig("zset-max-ziplist-value", NULL, MODIFIABLE_CONFIG, 0, LONG_MAX, server.zset_max_ziplist_value, 64, MEMORY_CONFIG, NULL, NULL),
createSizeTConfig("hll-sparse-max-bytes", NULL, MODIFIABLE_CONFIG, 0, LONG_MAX, server.hll_sparse_max_bytes, 3000, MEMORY_CONFIG, NULL, NULL),
/* Other configs */
createTimeTConfig("repl-backlog-ttl", NULL, MODIFIABLE_CONFIG, 0, LONG_MAX, server.repl_backlog_time_limit, 60*60, INTEGER_CONFIG, NULL, NULL), /* Default: 1 hour */
createOffTConfig("auto-aof-rewrite-min-size", NULL, MODIFIABLE_CONFIG, 0, LLONG_MAX, server.aof_rewrite_min_size, 64*1024*1024, MEMORY_CONFIG, NULL, NULL),
#ifdef USE_OPENSSL
createIntConfig("tls-port", NULL, IMMUTABLE_CONFIG, 0, 65535, server.tls_port, 0, INTEGER_CONFIG, NULL, NULL), /* TCP port. */
createBoolConfig("tls-cluster", NULL, MODIFIABLE_CONFIG, server.tls_cluster, 0, NULL, NULL),
createBoolConfig("tls-replication", NULL, MODIFIABLE_CONFIG, server.tls_replication, 0, NULL, NULL),
createBoolConfig("tls-auth-clients", NULL, MODIFIABLE_CONFIG, server.tls_auth_clients, 1, NULL, NULL),
createBoolConfig("tls-prefer-server-ciphers", NULL, MODIFIABLE_CONFIG, server.tls_ctx_config.prefer_server_ciphers, 0, NULL, updateTlsCfgBool),
createStringConfig("tls-cert-file", NULL, MODIFIABLE_CONFIG, EMPTY_STRING_IS_NULL, server.tls_ctx_config.cert_file, NULL, NULL, updateTlsCfg),
createStringConfig("tls-key-file", NULL, MODIFIABLE_CONFIG, EMPTY_STRING_IS_NULL, server.tls_ctx_config.key_file, NULL, NULL, updateTlsCfg),
createStringConfig("tls-dh-params-file", NULL, MODIFIABLE_CONFIG, EMPTY_STRING_IS_NULL, server.tls_ctx_config.dh_params_file, NULL, NULL, updateTlsCfg),
createStringConfig("tls-ca-cert-file", NULL, MODIFIABLE_CONFIG, EMPTY_STRING_IS_NULL, server.tls_ctx_config.ca_cert_file, NULL, NULL, updateTlsCfg),
createStringConfig("tls-ca-cert-dir", NULL, MODIFIABLE_CONFIG, EMPTY_STRING_IS_NULL, server.tls_ctx_config.ca_cert_dir, NULL, NULL, updateTlsCfg),
createStringConfig("tls-protocols", NULL, MODIFIABLE_CONFIG, EMPTY_STRING_IS_NULL, server.tls_ctx_config.protocols, NULL, NULL, updateTlsCfg),
createStringConfig("tls-ciphers", NULL, MODIFIABLE_CONFIG, EMPTY_STRING_IS_NULL, server.tls_ctx_config.ciphers, NULL, NULL, updateTlsCfg),
createStringConfig("tls-ciphersuites", NULL, MODIFIABLE_CONFIG, EMPTY_STRING_IS_NULL, server.tls_ctx_config.ciphersuites, NULL, NULL, updateTlsCfg),
#endif
/* NULL Terminator */
{NULL}
};
/*-----------------------------------------------------------------------------
* CONFIG command entry point
*----------------------------------------------------------------------------*/
void configCommand(client *c) {
/* Only allow CONFIG GET while loading. */
if (server.loading && strcasecmp(c->argv[1]->ptr,"get")) {
addReplyError(c,"Only CONFIG GET is allowed during loading");
return;
}
if (c->argc == 2 && !strcasecmp(c->argv[1]->ptr,"help")) {
const char *help[] = {
"GET <pattern> -- Return parameters matching the glob-like <pattern> and their values.",
"SET <parameter> <value> -- Set parameter to value.",
"RESETSTAT -- Reset statistics reported by INFO.",
"REWRITE -- Rewrite the configuration file.",
NULL
};
addReplyHelp(c, help);
} else if (!strcasecmp(c->argv[1]->ptr,"set") && c->argc == 4) {
configSetCommand(c);
} else if (!strcasecmp(c->argv[1]->ptr,"get") && c->argc == 3) {
configGetCommand(c);
} else if (!strcasecmp(c->argv[1]->ptr,"resetstat") && c->argc == 2) {
resetServerStats();
resetCommandTableStats();
addReply(c,shared.ok);
} else if (!strcasecmp(c->argv[1]->ptr,"rewrite") && c->argc == 2) {
if (server.configfile == NULL) {
addReplyError(c,"The server is running without a config file");
return;
}
if (rewriteConfig(server.configfile) == -1) {
serverLog(LL_WARNING,"CONFIG REWRITE failed: %s", strerror(errno));
addReplyErrorFormat(c,"Rewriting config file: %s", strerror(errno));
} else {
serverLog(LL_WARNING,"CONFIG REWRITE executed with success.");
addReply(c,shared.ok);
}
} else {
addReplySubcommandSyntaxError(c);
return;
}
}