int mdb_init ( size_t size )
{
enum hashfunc_type hash_type = JENKINS_HASH;
bool preallocate = false;
bool start_lru_crawler = true;
process_started = time (0);
settings_init (size);
init_lru_crawler ();
init_lru_maintainer ();
setbuf (stderr, NULL);
if ( hash_init (hash_type) != 0 )
{
fprintf (stderr, "Failed to initialize hash_algorithm!\n");
return - 1;
}
assoc_init (settings.hashpower_init);
if ( enable_large_pages () == 0 )
{
preallocate = true;
}
slabs_init (settings.maxbytes, settings.factor, preallocate);
memcached_thread_init ();
if ( start_assoc_maintenance_thread () == - 1 )
{
return - 1;
}
if ( start_lru_crawler && start_lru_maintainer_thread () != 0 )
{
fprintf (stderr, "Failed to enable LRU maintainer thread\n");
return - 1;
}
if ( settings.slab_reassign && start_slab_maintenance_thread () == - 1 )
{
return - 1;
}
return 0;
}
int main(int argc, char *argv[])
{
int c;
int do_daemonize= 0;
int maxcore = 0;
struct rlimit rlim;
char unit = '\0';
int size_max = 0;
int protocol_specified = 0;
int tcp_specified = 0;
int udp_specified = 0;
char *subopts;
char *subopts_value;
enum {
MAXCONNS_FAST = 0,
HASHPOWER_INIT,
SLAB_REASSIGN,
SLAB_AUTOMOVE
};
char *const subopts_tokens[] = {
[MAXCONNS_FAST] = "maxconns_fast",
[HASHPOWER_INIT]= "hashpower",
[SLAB_REASSIGN] = "slab_reassign",
[SLAB_AUTOMOVE] = "slab_automove",
NULL
};
/* init settings */
settings_init();
/* set stderr non-buffering (for running under, say, daemontools) */
setbuf(stderr, NULL);
/* process arguments */
while (-1 != (c = getopt(argc, argv,
"a:" /* access mask for unix socket */
"A" /* enable admin shutdown commannd */
"p:" /* TCP port number to listen on */
"s:" /* unix socket path to listen on */
"U:" /* UDP port number to listen on */
"m:" /* max memory to use for items in megabytes */
"M" /* return error on memory exhausted */
"c:" /* max simultaneous connections */
"hi" /* help, licence info */
"r" /* maximize core file limit */
"v" /* verbose */
"d" /* daemon mode */
"l:" /* interface to listen on */
"f:" /* factor? */
"n:" /* minimum space allocated for key+value+flags */
"D:" /* prefix delimiter? */
"L" /* Large memory pages */
"R:" /* max requests per event */
"C" /* Disable use of CAS */
"b:" /* backlog queue limit */
"B:" /* Binding protocol */
"I:" /* Max item size */
"S" /* Sasl ON */
"o:" /* Extended generic options */
))) {
switch (c) {
case 'A':
/* enables "shutdown" command */
settings.shutdown_command = 1;
break;
case 'a':
/* access for unix domain socket, as octal mask (like chmod)*/
settings.access= strtol(optarg,NULL,8);
break;
case 'U':
settings.udpport = atoi(optarg);
udp_specified = 1;
break;
case 'p':
settings.port = atoi(optarg);
tcp_specified = 1;
break;
case 's':
settings.socketpath = optarg;
break;
case 'm':
settings.maxbytes = ((size_t)atoi(optarg)) * 1024 * 1024;
break;
case 'M':
settings.evict_to_free = 0;
break;
case 'c':
settings.maxconns = atoi(optarg);
break;
case 'h':
usage();
exit(EXIT_SUCCESS);
case 'i':
usage_license();
exit(EXIT_SUCCESS);
case 'v':
settings.verbose++;
break;
case 'l':
if (settings.inter != NULL) {
size_t len = strlen(settings.inter) + strlen(optarg) + 2;
char *p = malloc(len);
if (p == NULL) {
fprintf(stderr, "Failed to allocate memory\n");
return 1;
}
snprintf(p, len, "%s,%s", settings.inter, optarg);
free(settings.inter);
settings.inter = p;
} else {
settings.inter= strdup(optarg);
}
break;
case 'd':
do_daemonize = 1;
break;
case 'r':
maxcore = 1;
break;
case 'R':
settings.reqs_per_event = atoi(optarg);
if (settings.reqs_per_event == 0) {
fprintf(stderr, "Number of requests per event must be greater than 0\n");
return 1;
}
break;
case 'f':
if (atof(optarg) <= 1.0) {
fprintf(stderr, "Factor must be greater than 1\n");
return 1;
}
double_int(optarg, &settings.factor_numerator, &settings.factor_denominator);
break;
case 'n':
settings.chunk_size = atoi(optarg);
if (settings.chunk_size == 0) {
fprintf(stderr, "Chunk size must be greater than 0\n");
return 1;
}
break;
case 'D':
if (! optarg || ! optarg[0]) {
fprintf(stderr, "No delimiter specified\n");
return 1;
}
settings.prefix_delimiter = optarg[0];
settings.detail_enabled = 1;
break;
case 'L' :
if (enable_large_pages() == 0) {
settings.preallocate = 1;
} else {
fprintf(stderr, "Cannot enable large pages on this system\n"
"(There is no Linux support as of this version)\n");
return 1;
}
break;
case 'C' :
settings.use_cas = 0;
break;
case 'b' :
settings.backlog = atoi(optarg);
break;
case 'B':
protocol_specified = 1;
if (strcmp(optarg, "auto") == 0) {
settings.binding_protocol = negotiating_prot;
} else if (strcmp(optarg, "binary") == 0) {
settings.binding_protocol = binary_prot;
} else if (strcmp(optarg, "ascii") == 0) {
settings.binding_protocol = ascii_prot;
} else {
fprintf(stderr, "Invalid value for binding protocol: %s\n"
" -- should be one of auto, binary, or ascii\n", optarg);
exit(EX_USAGE);
}
break;
case 'I':
unit = optarg[strlen(optarg)-1];
if (unit == 'k' || unit == 'm' ||
unit == 'K' || unit == 'M') {
optarg[strlen(optarg)-1] = '\0';
size_max = atoi(optarg);
if (unit == 'k' || unit == 'K')
size_max *= 1024;
if (unit == 'm' || unit == 'M')
size_max *= 1024 * 1024;
settings.item_size_max = size_max;
} else {
settings.item_size_max = atoi(optarg);
}
if (settings.item_size_max < 1024) {
fprintf(stderr, "Item max size cannot be less than 1024 bytes.\n");
return 1;
}
if (settings.item_size_max > 1024 * 1024 * 128) {
fprintf(stderr, "Cannot set item size limit higher than 128 mb.\n");
return 1;
}
if (settings.item_size_max > 1024 * 1024) {
fprintf(stderr, "WARNING: Setting item max size above 1MB is not"
" recommended!\n"
" Raising this limit increases the minimum memory requirements\n"
" and will decrease your memory efficiency.\n"
);
}
break;
case 'S': /* set Sasl authentication to 1. Default is 0 */
#ifndef ENABLE_SASL
fprintf(stderr, "This server is not built with SASL support.\n");
exit(EX_USAGE);
#endif
settings.sasl = 1;
break;
case 'o': /* It's sub-opts time! */
subopts = optarg;
while (*subopts != '\0') {
switch (getsubopt(&subopts, subopts_tokens, &subopts_value)) {
case MAXCONNS_FAST:
settings.maxconns_fast = 1;
break;
case HASHPOWER_INIT:
if (subopts_value == NULL) {
fprintf(stderr, "Missing numeric argument for hashpower\n");
return 1;
}
settings.hashpower_init = atoi(subopts_value);
if (settings.hashpower_init < 12) {
fprintf(stderr, "Initial hashtable multiplier of %d is too low\n",
settings.hashpower_init);
return 1;
} else if (settings.hashpower_init > 64) {
fprintf(stderr, "Initial hashtable multiplier of %d is too high\n"
"Choose a value based on \"STAT hash_power_level\" from a running instance\n",
settings.hashpower_init);
return 1;
}
break;
case SLAB_REASSIGN:
settings.slab_reassign = 1;
break;
case SLAB_AUTOMOVE:
if (subopts_value == NULL) {
settings.slab_automove = 1;
break;
}
settings.slab_automove = atoi(subopts_value);
if (settings.slab_automove < 0 || settings.slab_automove > 2) {
fprintf(stderr, "slab_automove must be between 0 and 2\n");
return 1;
}
break;
default:
printf("Illegal suboption \"%s\"\n", subopts_value);
return 1;
}
}
break;
default:
fprintf(stderr, "Illegal argument \"%c\"\n", c);
return 1;
}
}
/*
* Use one workerthread to serve each UDP port if the user specified
* multiple ports
*/
if (settings.inter != NULL && strchr(settings.inter, ',')) {
settings.num_threads_per_udp = 1;
} else {
settings.num_threads_per_udp = 0x7fffffff;
}
if (settings.sasl) {
if (!protocol_specified) {
settings.binding_protocol = binary_prot;
} else {
if (settings.binding_protocol != binary_prot) {
fprintf(stderr, "ERROR: You cannot allow the ASCII protocol while using SASL.\n");
exit(EX_USAGE);
}
}
}
if (tcp_specified && !udp_specified) {
settings.udpport = settings.port;
} else if (udp_specified && !tcp_specified) {
settings.port = settings.udpport;
}
if (maxcore != 0) {
struct rlimit rlim_new;
/*
* First try raising to infinity; if that fails, try bringing
* the soft limit to the hard.
*/
if (getrlimit(RLIMIT_CORE, &rlim) == 0) {
rlim_new.rlim_cur = rlim_new.rlim_max = RLIM_INFINITY;
if (setrlimit(RLIMIT_CORE, &rlim_new)!= 0) {
/* failed. try raising just to the old max */
rlim_new.rlim_cur = rlim_new.rlim_max = rlim.rlim_max;
(void)setrlimit(RLIMIT_CORE, &rlim_new);
}
}
/*
* getrlimit again to see what we ended up with. Only fail if
* the soft limit ends up 0, because then no core files will be
* created at all.
*/
if ((getrlimit(RLIMIT_CORE, &rlim) != 0) || rlim.rlim_cur == 0) {
fprintf(stderr, "failed to ensure corefile creation\n");
exit(EX_OSERR);
}
}
/*
* If needed, increase rlimits to allow as many connections
* as needed.
*/
if (getrlimit(RLIMIT_NOFILE, &rlim) != 0) {
fprintf(stderr, "failed to getrlimit number of files\n");
exit(EX_OSERR);
} else {
rlim.rlim_cur = settings.maxconns;
rlim.rlim_max = settings.maxconns;
if (setrlimit(RLIMIT_NOFILE, &rlim) != 0) {
fprintf(stderr, "failed to set rlimit for open files. Try starting as root or requesting smaller maxconns value.\n");
exit(EX_OSERR);
}
}
/* lose root privileges if we have them */
if (getuid() != 0 || geteuid() != 0) {
fprintf(stderr, "run as root\n");
exit(EX_USAGE);
}
/* Initialize Sasl if -S was specified */
if (settings.sasl) {
// init_sasl();
}
/* daemonize if requested */
/* if we want to ensure our ability to dump core, don't chdir to / */
if (do_daemonize) {
if (sigignore(SIGHUP) == -1) {
perror("Failed to ignore SIGHUP");
}
if (daemonize(maxcore, settings.verbose) == -1) {
fprintf(stderr, "failed to daemon() in order to daemonize\n");
exit(EXIT_FAILURE);
}
}
main_loop();
return 0;
}