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/* -*- Mode: C; tab-width: 4; c-basic-offset: 4; indent-tabs-mode: nil -*- */
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/** \file
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* The main memcached header holding commonly used data
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* structures and function prototypes.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <sys/time.h>
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#include <netinet/in.h>
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#include <event.h>
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#include <netdb.h>
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#include <pthread.h>
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#include <unistd.h>
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#include <assert.h>
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#include <grp.h>
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#include <signal.h>
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#include "itoa_ljust.h"
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#include "protocol_binary.h"
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#include "cache.h"
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#include "logger.h"
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#ifdef EXTSTORE
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#include "extstore.h"
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#include "crc32c.h"
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#endif
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#include "sasl_defs.h"
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#ifdef TLS
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#include <openssl/ssl.h>
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#endif
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/** Maximum length of a key. */
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#define KEY_MAX_LENGTH 250
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/** Maximum length of a uri encoded key. */
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#define KEY_MAX_URI_ENCODED_LENGTH (KEY_MAX_LENGTH * 3 + 1)
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/** Size of an incr buf. */
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#define INCR_MAX_STORAGE_LEN 24
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#define DATA_BUFFER_SIZE 2048
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#define UDP_READ_BUFFER_SIZE 65536
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#define UDP_MAX_PAYLOAD_SIZE 1400
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#define UDP_HEADER_SIZE 8
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#define MAX_SENDBUF_SIZE (256 * 1024 * 1024)
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/* Up to 3 numbers (2 32bit, 1 64bit), spaces, newlines, null 0 */
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#define SUFFIX_SIZE 50
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/** Initial size of list of items being returned by "get". */
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#define ITEM_LIST_INITIAL 200
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/** Initial size of list of CAS suffixes appended to "gets" lines. */
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#define SUFFIX_LIST_INITIAL 100
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/** Initial size of the sendmsg() scatter/gather array. */
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#define IOV_LIST_INITIAL 400
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/** Initial number of sendmsg() argument structures to allocate. */
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#define MSG_LIST_INITIAL 10
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/** High water marks for buffer shrinking */
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#define READ_BUFFER_HIGHWAT 8192
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#define ITEM_LIST_HIGHWAT 400
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#define IOV_LIST_HIGHWAT 600
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#define MSG_LIST_HIGHWAT 100
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/* Binary protocol stuff */
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#define MIN_BIN_PKT_LENGTH 16
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#define BIN_PKT_HDR_WORDS (MIN_BIN_PKT_LENGTH/sizeof(uint32_t))
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/* Initial power multiplier for the hash table */
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#define HASHPOWER_DEFAULT 16
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#define HASHPOWER_MAX 32
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/*
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* We only reposition items in the LRU queue if they haven't been repositioned
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* in this many seconds. That saves us from churning on frequently-accessed
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* items.
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*/
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#define ITEM_UPDATE_INTERVAL 60
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/*
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* Valid range of the maximum size of an item, in bytes.
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*/
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#define ITEM_SIZE_MAX_LOWER_LIMIT 1024
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#define ITEM_SIZE_MAX_UPPER_LIMIT 1024 * 1024 * 1024
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/* unistd.h is here */
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#if HAVE_UNISTD_H
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# include <unistd.h>
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#endif
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/* Slab sizing definitions. */
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#define POWER_SMALLEST 1
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#define POWER_LARGEST 256 /* actual cap is 255 */
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#define SLAB_GLOBAL_PAGE_POOL 0 /* magic slab class for storing pages for reassignment */
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#define CHUNK_ALIGN_BYTES 8
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/* slab class max is a 6-bit number, -1. */
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#define MAX_NUMBER_OF_SLAB_CLASSES (63 + 1)
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/** How long an object can reasonably be assumed to be locked before
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harvesting it on a low memory condition. Default: disabled. */
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#define TAIL_REPAIR_TIME_DEFAULT 0
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/* warning: don't use these macros with a function, as it evals its arg twice */
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#define ITEM_get_cas(i) (((i)->it_flags & ITEM_CAS) ? \
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(i)->data->cas : (uint64_t)0)
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#define ITEM_set_cas(i,v) { \
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if ((i)->it_flags & ITEM_CAS) { \
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(i)->data->cas = v; \
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} \
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}
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#define ITEM_key(item) (((char*)&((item)->data)) \
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+ (((item)->it_flags & ITEM_CAS) ? sizeof(uint64_t) : 0))
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#define ITEM_suffix(item) ((char*) &((item)->data) + (item)->nkey + 1 \
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+ (((item)->it_flags & ITEM_CAS) ? sizeof(uint64_t) : 0))
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#define ITEM_data(item) ((char*) &((item)->data) + (item)->nkey + 1 \
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+ (((item)->it_flags & ITEM_CFLAGS) ? sizeof(uint32_t) : 0) \
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+ (((item)->it_flags & ITEM_CAS) ? sizeof(uint64_t) : 0))
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#define ITEM_ntotal(item) (sizeof(struct _stritem) + (item)->nkey + 1 \
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+ (item)->nbytes \
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+ (((item)->it_flags & ITEM_CFLAGS) ? sizeof(uint32_t) : 0) \
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+ (((item)->it_flags & ITEM_CAS) ? sizeof(uint64_t) : 0))
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#define ITEM_clsid(item) ((item)->slabs_clsid & ~(3<<6))
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#define ITEM_lruid(item) ((item)->slabs_clsid & (3<<6))
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#define STAT_KEY_LEN 128
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#define STAT_VAL_LEN 128
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/** Append a simple stat with a stat name, value format and value */
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#define APPEND_STAT(name, fmt, val) \
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append_stat(name, add_stats, c, fmt, val);
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/** Append an indexed stat with a stat name (with format), value format
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and value */
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#define APPEND_NUM_FMT_STAT(name_fmt, num, name, fmt, val) \
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klen = snprintf(key_str, STAT_KEY_LEN, name_fmt, num, name); \
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vlen = snprintf(val_str, STAT_VAL_LEN, fmt, val); \
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add_stats(key_str, klen, val_str, vlen, c);
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/** Common APPEND_NUM_FMT_STAT format. */
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#define APPEND_NUM_STAT(num, name, fmt, val) \
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APPEND_NUM_FMT_STAT("%d:%s", num, name, fmt, val)
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/** Item client flag conversion */
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#define FLAGS_CONV(it, flag) { \
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if ((it)->it_flags & ITEM_CFLAGS) { \
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flag = *((uint32_t *)ITEM_suffix((it))); \
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} else { \
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flag = 0; \
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} \
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}
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#define FLAGS_SIZE(item) (((item)->it_flags & ITEM_CFLAGS) ? sizeof(uint32_t) : 0)
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/**
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* Callback for any function producing stats.
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*
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* @param key the stat's key
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* @param klen length of the key
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* @param val the stat's value in an ascii form (e.g. text form of a number)
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* @param vlen length of the value
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* @parm cookie magic callback cookie
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*/
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typedef void (*ADD_STAT)(const char *key, const uint16_t klen,
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const char *val, const uint32_t vlen,
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const void *cookie);
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/*
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* NOTE: If you modify this table you _MUST_ update the function state_text
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*/
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/**
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* Possible states of a connection.
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*/
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enum conn_states {
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conn_listening, /**< the socket which listens for connections */
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conn_new_cmd, /**< Prepare connection for next command */
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conn_waiting, /**< waiting for a readable socket */
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conn_read, /**< reading in a command line */
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conn_parse_cmd, /**< try to parse a command from the input buffer */
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conn_write, /**< writing out a simple response */
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conn_nread, /**< reading in a fixed number of bytes */
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conn_swallow, /**< swallowing unnecessary bytes w/o storing */
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conn_closing, /**< closing this connection */
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conn_mwrite, /**< writing out many items sequentially */
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conn_closed, /**< connection is closed */
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conn_watch, /**< held by the logger thread as a watcher */
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conn_max_state /**< Max state value (used for assertion) */
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};
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enum bin_substates {
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bin_no_state,
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bin_reading_set_header,
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bin_reading_cas_header,
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bin_read_set_value,
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bin_reading_get_key,
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bin_reading_stat,
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bin_reading_del_header,
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bin_reading_incr_header,
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bin_read_flush_exptime,
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bin_reading_sasl_auth,
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bin_reading_sasl_auth_data,
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bin_reading_touch_key,
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};
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enum protocol {
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ascii_prot = 3, /* arbitrary value. */
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binary_prot,
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negotiating_prot /* Discovering the protocol */
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};
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enum network_transport {
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local_transport, /* Unix sockets*/
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tcp_transport,
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udp_transport
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};
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enum pause_thread_types {
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PAUSE_WORKER_THREADS = 0,
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PAUSE_ALL_THREADS,
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RESUME_ALL_THREADS,
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RESUME_WORKER_THREADS
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};
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enum stop_reasons {
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NOT_STOP,
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GRACE_STOP,
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EXIT_NORMALLY
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};
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554781 |
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#define IS_TCP(x) (x == tcp_transport)
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#define IS_UDP(x) (x == udp_transport)
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#define NREAD_ADD 1
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#define NREAD_SET 2
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#define NREAD_REPLACE 3
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#define NREAD_APPEND 4
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#define NREAD_PREPEND 5
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#define NREAD_CAS 6
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enum store_item_type {
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NOT_STORED=0, STORED, EXISTS, NOT_FOUND, TOO_LARGE, NO_MEMORY
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};
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enum delta_result_type {
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OK, NON_NUMERIC, EOM, DELTA_ITEM_NOT_FOUND, DELTA_ITEM_CAS_MISMATCH
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};
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/** Time relative to server start. Smaller than time_t on 64-bit systems. */
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// TODO: Move to sub-header. needed in logger.h
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//typedef unsigned int rel_time_t;
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/** Use X macros to avoid iterating over the stats fields during reset and
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* aggregation. No longer have to add new stats in 3+ places.
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*/
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#define SLAB_STATS_FIELDS \
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X(set_cmds) \
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X(get_hits) \
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X(touch_hits) \
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X(delete_hits) \
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X(cas_hits) \
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X(cas_badval) \
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|
Packit |
4e8bc4 |
X(incr_hits) \
|
|
Packit |
4e8bc4 |
X(decr_hits)
|
|
Packit |
4e8bc4 |
|
|
Packit |
4e8bc4 |
/** Stats stored per slab (and per thread). */
|
|
Packit |
4e8bc4 |
struct slab_stats {
|
|
Packit |
4e8bc4 |
#define X(name) uint64_t name;
|
|
Packit |
4e8bc4 |
SLAB_STATS_FIELDS
|
|
Packit |
4e8bc4 |
#undef X
|
|
Packit |
4e8bc4 |
};
|
|
Packit |
4e8bc4 |
|
|
Packit |
4e8bc4 |
#define THREAD_STATS_FIELDS \
|
|
Packit |
4e8bc4 |
X(get_cmds) \
|
|
Packit |
4e8bc4 |
X(get_misses) \
|
|
Packit |
4e8bc4 |
X(get_expired) \
|
|
Packit |
4e8bc4 |
X(get_flushed) \
|
|
Packit |
4e8bc4 |
X(touch_cmds) \
|
|
Packit |
4e8bc4 |
X(touch_misses) \
|
|
Packit |
4e8bc4 |
X(delete_misses) \
|
|
Packit |
4e8bc4 |
X(incr_misses) \
|
|
Packit |
4e8bc4 |
X(decr_misses) \
|
|
Packit |
4e8bc4 |
X(cas_misses) \
|
|
Packit |
4e8bc4 |
X(meta_cmds) \
|
|
Packit |
4e8bc4 |
X(bytes_read) \
|
|
Packit |
4e8bc4 |
X(bytes_written) \
|
|
Packit |
4e8bc4 |
X(flush_cmds) \
|
|
Packit |
4e8bc4 |
X(conn_yields) /* # of yields for connections (-R option)*/ \
|
|
Packit |
4e8bc4 |
X(auth_cmds) \
|
|
Packit |
4e8bc4 |
X(auth_errors) \
|
|
Packit |
4e8bc4 |
X(idle_kicks) /* idle connections killed */
|
|
Packit |
4e8bc4 |
|
|
Packit |
4e8bc4 |
#ifdef EXTSTORE
|
|
Packit |
4e8bc4 |
#define EXTSTORE_THREAD_STATS_FIELDS \
|
|
Packit |
4e8bc4 |
X(get_extstore) \
|
|
Packit |
4e8bc4 |
X(get_aborted_extstore) \
|
|
Packit |
4e8bc4 |
X(get_oom_extstore) \
|
|
Packit |
4e8bc4 |
X(recache_from_extstore) \
|
|
Packit |
4e8bc4 |
X(miss_from_extstore) \
|
|
Packit |
4e8bc4 |
X(badcrc_from_extstore)
|
|
Packit |
4e8bc4 |
#endif
|
|
Packit |
4e8bc4 |
|
|
Packit |
4e8bc4 |
/**
|
|
Packit |
4e8bc4 |
* Stats stored per-thread.
|
|
Packit |
4e8bc4 |
*/
|
|
Packit |
4e8bc4 |
struct thread_stats {
|
|
Packit |
4e8bc4 |
pthread_mutex_t mutex;
|
|
Packit |
4e8bc4 |
#define X(name) uint64_t name;
|
|
Packit |
4e8bc4 |
THREAD_STATS_FIELDS
|
|
Packit |
4e8bc4 |
#ifdef EXTSTORE
|
|
Packit |
4e8bc4 |
EXTSTORE_THREAD_STATS_FIELDS
|
|
Packit |
4e8bc4 |
#endif
|
|
Packit |
4e8bc4 |
#undef X
|
|
Packit |
4e8bc4 |
struct slab_stats slab_stats[MAX_NUMBER_OF_SLAB_CLASSES];
|
|
Packit |
4e8bc4 |
uint64_t lru_hits[POWER_LARGEST];
|
|
Packit |
4e8bc4 |
};
|
|
Packit |
4e8bc4 |
|
|
Packit |
4e8bc4 |
/**
|
|
Packit |
4e8bc4 |
* Global stats. Only resettable stats should go into this structure.
|
|
Packit |
4e8bc4 |
*/
|
|
Packit |
4e8bc4 |
struct stats {
|
|
Packit |
4e8bc4 |
uint64_t total_items;
|
|
Packit |
4e8bc4 |
uint64_t total_conns;
|
|
Packit |
4e8bc4 |
uint64_t rejected_conns;
|
|
Packit |
4e8bc4 |
uint64_t malloc_fails;
|
|
Packit |
4e8bc4 |
uint64_t listen_disabled_num;
|
|
Packit |
4e8bc4 |
uint64_t slabs_moved; /* times slabs were moved around */
|
|
Packit |
4e8bc4 |
uint64_t slab_reassign_rescues; /* items rescued during slab move */
|
|
Packit |
4e8bc4 |
uint64_t slab_reassign_evictions_nomem; /* valid items lost during slab move */
|
|
Packit |
4e8bc4 |
uint64_t slab_reassign_inline_reclaim; /* valid items lost during slab move */
|
|
Packit |
4e8bc4 |
uint64_t slab_reassign_chunk_rescues; /* chunked-item chunks recovered */
|
|
Packit |
4e8bc4 |
uint64_t slab_reassign_busy_items; /* valid temporarily unmovable */
|
|
Packit |
4e8bc4 |
uint64_t slab_reassign_busy_deletes; /* refcounted items killed */
|
|
Packit |
4e8bc4 |
uint64_t lru_crawler_starts; /* Number of item crawlers kicked off */
|
|
Packit |
4e8bc4 |
uint64_t lru_maintainer_juggles; /* number of LRU bg pokes */
|
|
Packit |
4e8bc4 |
uint64_t time_in_listen_disabled_us; /* elapsed time in microseconds while server unable to process new connections */
|
|
Packit |
4e8bc4 |
uint64_t log_worker_dropped; /* logs dropped by worker threads */
|
|
Packit |
4e8bc4 |
uint64_t log_worker_written; /* logs written by worker threads */
|
|
Packit |
4e8bc4 |
uint64_t log_watcher_skipped; /* logs watchers missed */
|
|
Packit |
4e8bc4 |
uint64_t log_watcher_sent; /* logs sent to watcher buffers */
|
|
Packit |
4e8bc4 |
#ifdef EXTSTORE
|
|
Packit |
4e8bc4 |
uint64_t extstore_compact_lost; /* items lost because they were locked */
|
|
Packit |
4e8bc4 |
uint64_t extstore_compact_rescues; /* items re-written during compaction */
|
|
Packit |
4e8bc4 |
uint64_t extstore_compact_skipped; /* unhit items skipped during compaction */
|
|
Packit |
4e8bc4 |
#endif
|
|
Packit Service |
aafb6d |
#ifdef TLS
|
|
Packit Service |
aafb6d |
uint64_t ssl_handshake_errors; /* TLS failures at accept/handshake time */
|
|
Packit Service |
aafb6d |
#endif
|
|
Packit |
4e8bc4 |
struct timeval maxconns_entered; /* last time maxconns entered */
|
|
Packit |
4e8bc4 |
};
|
|
Packit |
4e8bc4 |
|
|
Packit |
4e8bc4 |
/**
|
|
Packit |
4e8bc4 |
* Global "state" stats. Reflects state that shouldn't be wiped ever.
|
|
Packit |
4e8bc4 |
* Ordered for some cache line locality for commonly updated counters.
|
|
Packit |
4e8bc4 |
*/
|
|
Packit |
4e8bc4 |
struct stats_state {
|
|
Packit |
4e8bc4 |
uint64_t curr_items;
|
|
Packit |
4e8bc4 |
uint64_t curr_bytes;
|
|
Packit |
4e8bc4 |
uint64_t curr_conns;
|
|
Packit |
4e8bc4 |
uint64_t hash_bytes; /* size used for hash tables */
|
|
Packit |
4e8bc4 |
unsigned int conn_structs;
|
|
Packit |
4e8bc4 |
unsigned int reserved_fds;
|
|
Packit |
4e8bc4 |
unsigned int hash_power_level; /* Better hope it's not over 9000 */
|
|
Packit |
4e8bc4 |
bool hash_is_expanding; /* If the hash table is being expanded */
|
|
Packit |
4e8bc4 |
bool accepting_conns; /* whether we are currently accepting */
|
|
Packit |
4e8bc4 |
bool slab_reassign_running; /* slab reassign in progress */
|
|
Packit |
4e8bc4 |
bool lru_crawler_running; /* crawl in progress */
|
|
Packit |
4e8bc4 |
};
|
|
Packit |
4e8bc4 |
|
|
Packit |
4e8bc4 |
#define MAX_VERBOSITY_LEVEL 2
|
|
Packit |
4e8bc4 |
|
|
Packit |
4e8bc4 |
/* When adding a setting, be sure to update process_stat_settings */
|
|
Packit |
4e8bc4 |
/**
|
|
Packit |
4e8bc4 |
* Globally accessible settings as derived from the commandline.
|
|
Packit |
4e8bc4 |
*/
|
|
Packit |
4e8bc4 |
struct settings {
|
|
Packit |
4e8bc4 |
size_t maxbytes;
|
|
Packit |
4e8bc4 |
int maxconns;
|
|
Packit |
4e8bc4 |
int port;
|
|
Packit |
4e8bc4 |
int udpport;
|
|
Packit |
4e8bc4 |
char *inter;
|
|
Packit |
4e8bc4 |
int verbose;
|
|
Packit |
4e8bc4 |
rel_time_t oldest_live; /* ignore existing items older than this */
|
|
Packit |
4e8bc4 |
uint64_t oldest_cas; /* ignore existing items with CAS values lower than this */
|
|
Packit |
4e8bc4 |
int evict_to_free;
|
|
Packit |
4e8bc4 |
char *socketpath; /* path to unix socket if using local socket */
|
|
Packit |
4e8bc4 |
char *auth_file; /* path to user authentication file */
|
|
Packit |
4e8bc4 |
int access; /* access mask (a la chmod) for unix domain socket */
|
|
Packit |
4e8bc4 |
double factor; /* chunk size growth factor */
|
|
Packit |
4e8bc4 |
int chunk_size;
|
|
Packit |
4e8bc4 |
int num_threads; /* number of worker (without dispatcher) libevent threads to run */
|
|
Packit |
4e8bc4 |
int num_threads_per_udp; /* number of worker threads serving each udp socket */
|
|
Packit |
4e8bc4 |
char prefix_delimiter; /* character that marks a key prefix (for stats) */
|
|
Packit |
4e8bc4 |
int detail_enabled; /* nonzero if we're collecting detailed stats */
|
|
Packit |
4e8bc4 |
int reqs_per_event; /* Maximum number of io to process on each
|
|
Packit |
4e8bc4 |
io-event. */
|
|
Packit |
4e8bc4 |
bool use_cas;
|
|
Packit |
4e8bc4 |
enum protocol binding_protocol;
|
|
Packit |
4e8bc4 |
int backlog;
|
|
Packit |
4e8bc4 |
int item_size_max; /* Maximum item size */
|
|
Packit |
4e8bc4 |
int slab_chunk_size_max; /* Upper end for chunks within slab pages. */
|
|
Packit |
4e8bc4 |
int slab_page_size; /* Slab's page units. */
|
|
Packit |
4e8bc4 |
volatile sig_atomic_t sig_hup; /* a HUP signal was received but not yet handled */
|
|
Packit |
4e8bc4 |
bool sasl; /* SASL on/off */
|
|
Packit |
4e8bc4 |
bool maxconns_fast; /* Whether or not to early close connections */
|
|
Packit |
4e8bc4 |
bool lru_crawler; /* Whether or not to enable the autocrawler thread */
|
|
Packit |
4e8bc4 |
bool lru_maintainer_thread; /* LRU maintainer background thread */
|
|
Packit |
4e8bc4 |
bool lru_segmented; /* Use split or flat LRU's */
|
|
Packit |
4e8bc4 |
bool slab_reassign; /* Whether or not slab reassignment is allowed */
|
|
Packit |
4e8bc4 |
int slab_automove; /* Whether or not to automatically move slabs */
|
|
Packit |
4e8bc4 |
double slab_automove_ratio; /* youngest must be within pct of oldest */
|
|
Packit |
4e8bc4 |
unsigned int slab_automove_window; /* window mover for algorithm */
|
|
Packit |
4e8bc4 |
int hashpower_init; /* Starting hash power level */
|
|
Packit |
4e8bc4 |
bool shutdown_command; /* allow shutdown command */
|
|
Packit |
4e8bc4 |
int tail_repair_time; /* LRU tail refcount leak repair time */
|
|
Packit |
4e8bc4 |
bool flush_enabled; /* flush_all enabled */
|
|
Packit |
4e8bc4 |
bool dump_enabled; /* whether cachedump/metadump commands work */
|
|
Packit |
4e8bc4 |
char *hash_algorithm; /* Hash algorithm in use */
|
|
Packit |
4e8bc4 |
int lru_crawler_sleep; /* Microsecond sleep between items */
|
|
Packit |
4e8bc4 |
uint32_t lru_crawler_tocrawl; /* Number of items to crawl per run */
|
|
Packit |
4e8bc4 |
int hot_lru_pct; /* percentage of slab space for HOT_LRU */
|
|
Packit |
4e8bc4 |
int warm_lru_pct; /* percentage of slab space for WARM_LRU */
|
|
Packit |
4e8bc4 |
double hot_max_factor; /* HOT tail age relative to COLD tail */
|
|
Packit |
4e8bc4 |
double warm_max_factor; /* WARM tail age relative to COLD tail */
|
|
Packit |
4e8bc4 |
int crawls_persleep; /* Number of LRU crawls to run before sleeping */
|
|
Packit |
4e8bc4 |
bool temp_lru; /* TTL < temporary_ttl uses TEMP_LRU */
|
|
Packit |
4e8bc4 |
uint32_t temporary_ttl; /* temporary LRU threshold */
|
|
Packit |
4e8bc4 |
int idle_timeout; /* Number of seconds to let connections idle */
|
|
Packit |
4e8bc4 |
unsigned int logger_watcher_buf_size; /* size of logger's per-watcher buffer */
|
|
Packit |
4e8bc4 |
unsigned int logger_buf_size; /* size of per-thread logger buffer */
|
|
Packit |
4e8bc4 |
bool drop_privileges; /* Whether or not to drop unnecessary process privileges */
|
|
Packit |
4e8bc4 |
bool watch_enabled; /* allows watch commands to be dropped */
|
|
Packit |
4e8bc4 |
bool relaxed_privileges; /* Relax process restrictions when running testapp */
|
|
Packit |
4e8bc4 |
#ifdef EXTSTORE
|
|
Packit |
4e8bc4 |
unsigned int ext_io_threadcount; /* number of IO threads to run. */
|
|
Packit |
4e8bc4 |
unsigned int ext_page_size; /* size in megabytes of storage pages. */
|
|
Packit |
4e8bc4 |
unsigned int ext_item_size; /* minimum size of items to store externally */
|
|
Packit |
4e8bc4 |
unsigned int ext_item_age; /* max age of tail item before storing ext. */
|
|
Packit |
4e8bc4 |
unsigned int ext_low_ttl; /* remaining TTL below this uses own pages */
|
|
Packit |
4e8bc4 |
unsigned int ext_recache_rate; /* counter++ % recache_rate == 0 > recache */
|
|
Packit |
4e8bc4 |
unsigned int ext_wbuf_size; /* read only note for the engine */
|
|
Packit |
4e8bc4 |
unsigned int ext_compact_under; /* when fewer than this many pages, compact */
|
|
Packit |
4e8bc4 |
unsigned int ext_drop_under; /* when fewer than this many pages, drop COLD items */
|
|
Packit |
4e8bc4 |
double ext_max_frag; /* ideal maximum page fragmentation */
|
|
Packit |
4e8bc4 |
double slab_automove_freeratio; /* % of memory to hold free as buffer */
|
|
Packit |
4e8bc4 |
bool ext_drop_unread; /* skip unread items during compaction */
|
|
Packit |
4e8bc4 |
/* per-slab-class free chunk limit */
|
|
Packit |
4e8bc4 |
unsigned int ext_free_memchunks[MAX_NUMBER_OF_SLAB_CLASSES];
|
|
Packit |
4e8bc4 |
#endif
|
|
Packit |
4e8bc4 |
#ifdef TLS
|
|
Packit |
4e8bc4 |
bool ssl_enabled; /* indicates whether SSL is enabled */
|
|
Packit |
4e8bc4 |
SSL_CTX *ssl_ctx; /* holds the SSL server context which has the server certificate */
|
|
Packit |
4e8bc4 |
char *ssl_chain_cert; /* path to the server SSL chain certificate */
|
|
Packit |
4e8bc4 |
char *ssl_key; /* path to the server key */
|
|
Packit |
4e8bc4 |
int ssl_verify_mode; /* client certificate verify mode */
|
|
Packit |
4e8bc4 |
int ssl_keyformat; /* key format , defult is PEM */
|
|
Packit |
4e8bc4 |
char *ssl_ciphers; /* list of SSL ciphers */
|
|
Packit |
4e8bc4 |
char *ssl_ca_cert; /* certificate with CAs. */
|
|
Packit |
4e8bc4 |
rel_time_t ssl_last_cert_refresh_time; /* time of the last server certificate refresh */
|
|
Packit |
4e8bc4 |
unsigned int ssl_wbuf_size; /* size of the write buffer used by ssl_sendmsg method */
|
|
Packit |
4e8bc4 |
#endif
|
|
Packit |
4e8bc4 |
};
|
|
Packit |
4e8bc4 |
|
|
Packit |
4e8bc4 |
extern struct stats stats;
|
|
Packit |
4e8bc4 |
extern struct stats_state stats_state;
|
|
Packit |
4e8bc4 |
extern time_t process_started;
|
|
Packit |
4e8bc4 |
extern struct settings settings;
|
|
Packit |
4e8bc4 |
|
|
Packit |
4e8bc4 |
#define ITEM_LINKED 1
|
|
Packit |
4e8bc4 |
#define ITEM_CAS 2
|
|
Packit |
4e8bc4 |
|
|
Packit |
4e8bc4 |
/* temp */
|
|
Packit |
4e8bc4 |
#define ITEM_SLABBED 4
|
|
Packit |
4e8bc4 |
|
|
Packit |
4e8bc4 |
/* Item was fetched at least once in its lifetime */
|
|
Packit |
4e8bc4 |
#define ITEM_FETCHED 8
|
|
Packit |
4e8bc4 |
/* Appended on fetch, removed on LRU shuffling */
|
|
Packit |
4e8bc4 |
#define ITEM_ACTIVE 16
|
|
Packit |
4e8bc4 |
/* If an item's storage are chained chunks. */
|
|
Packit |
4e8bc4 |
#define ITEM_CHUNKED 32
|
|
Packit |
4e8bc4 |
#define ITEM_CHUNK 64
|
|
Packit |
4e8bc4 |
/* ITEM_data bulk is external to item */
|
|
Packit |
4e8bc4 |
#define ITEM_HDR 128
|
|
Packit |
4e8bc4 |
/* additional 4 bytes for item client flags */
|
|
Packit |
4e8bc4 |
#define ITEM_CFLAGS 256
|
|
Packit |
4e8bc4 |
/* item has sent out a token already */
|
|
Packit |
4e8bc4 |
#define ITEM_TOKEN_SENT 512
|
|
Packit |
4e8bc4 |
/* reserved, in case tokens should be a 2-bit count in future */
|
|
Packit |
4e8bc4 |
#define ITEM_TOKEN_RESERVED 1024
|
|
Packit |
4e8bc4 |
/* if item has been marked as a stale value */
|
|
Packit |
4e8bc4 |
#define ITEM_STALE 2048
|
|
Packit |
4e8bc4 |
|
|
Packit |
4e8bc4 |
/**
|
|
Packit |
4e8bc4 |
* Structure for storing items within memcached.
|
|
Packit |
4e8bc4 |
*/
|
|
Packit |
4e8bc4 |
typedef struct _stritem {
|
|
Packit |
4e8bc4 |
/* Protected by LRU locks */
|
|
Packit |
4e8bc4 |
struct _stritem *next;
|
|
Packit |
4e8bc4 |
struct _stritem *prev;
|
|
Packit |
4e8bc4 |
/* Rest are protected by an item lock */
|
|
Packit |
4e8bc4 |
struct _stritem *h_next; /* hash chain next */
|
|
Packit |
4e8bc4 |
rel_time_t time; /* least recent access */
|
|
Packit |
4e8bc4 |
rel_time_t exptime; /* expire time */
|
|
Packit |
4e8bc4 |
int nbytes; /* size of data */
|
|
Packit |
4e8bc4 |
unsigned short refcount;
|
|
Packit |
4e8bc4 |
uint16_t it_flags; /* ITEM_* above */
|
|
Packit |
4e8bc4 |
uint8_t slabs_clsid;/* which slab class we're in */
|
|
Packit |
4e8bc4 |
uint8_t nkey; /* key length, w/terminating null and padding */
|
|
Packit |
4e8bc4 |
/* this odd type prevents type-punning issues when we do
|
|
Packit |
4e8bc4 |
* the little shuffle to save space when not using CAS. */
|
|
Packit |
4e8bc4 |
union {
|
|
Packit |
4e8bc4 |
uint64_t cas;
|
|
Packit |
4e8bc4 |
char end;
|
|
Packit |
4e8bc4 |
} data[];
|
|
Packit |
4e8bc4 |
/* if it_flags & ITEM_CAS we have 8 bytes CAS */
|
|
Packit |
4e8bc4 |
/* then null-terminated key */
|
|
Packit |
4e8bc4 |
/* then " flags length\r\n" (no terminating null) */
|
|
Packit |
4e8bc4 |
/* then data with terminating \r\n (no terminating null; it's binary!) */
|
|
Packit |
4e8bc4 |
} item;
|
|
Packit |
4e8bc4 |
|
|
Packit |
4e8bc4 |
// TODO: If we eventually want user loaded modules, we can't use an enum :(
|
|
Packit |
4e8bc4 |
enum crawler_run_type {
|
|
Packit |
4e8bc4 |
CRAWLER_AUTOEXPIRE=0, CRAWLER_EXPIRED, CRAWLER_METADUMP
|
|
Packit |
4e8bc4 |
};
|
|
Packit |
4e8bc4 |
|
|
Packit |
4e8bc4 |
typedef struct {
|
|
Packit |
4e8bc4 |
struct _stritem *next;
|
|
Packit |
4e8bc4 |
struct _stritem *prev;
|
|
Packit |
4e8bc4 |
struct _stritem *h_next; /* hash chain next */
|
|
Packit |
4e8bc4 |
rel_time_t time; /* least recent access */
|
|
Packit |
4e8bc4 |
rel_time_t exptime; /* expire time */
|
|
Packit |
4e8bc4 |
int nbytes; /* size of data */
|
|
Packit |
4e8bc4 |
unsigned short refcount;
|
|
Packit |
4e8bc4 |
uint16_t it_flags; /* ITEM_* above */
|
|
Packit |
4e8bc4 |
uint8_t slabs_clsid;/* which slab class we're in */
|
|
Packit |
4e8bc4 |
uint8_t nkey; /* key length, w/terminating null and padding */
|
|
Packit |
4e8bc4 |
uint32_t remaining; /* Max keys to crawl per slab per invocation */
|
|
Packit |
4e8bc4 |
uint64_t reclaimed; /* items reclaimed during this crawl. */
|
|
Packit |
4e8bc4 |
uint64_t unfetched; /* items reclaimed unfetched during this crawl. */
|
|
Packit |
4e8bc4 |
uint64_t checked; /* items examined during this crawl. */
|
|
Packit |
4e8bc4 |
} crawler;
|
|
Packit |
4e8bc4 |
|
|
Packit |
4e8bc4 |
/* Header when an item is actually a chunk of another item. */
|
|
Packit |
4e8bc4 |
typedef struct _strchunk {
|
|
Packit |
4e8bc4 |
struct _strchunk *next; /* points within its own chain. */
|
|
Packit |
4e8bc4 |
struct _strchunk *prev; /* can potentially point to the head. */
|
|
Packit |
4e8bc4 |
struct _stritem *head; /* always points to the owner chunk */
|
|
Packit |
4e8bc4 |
int size; /* available chunk space in bytes */
|
|
Packit |
4e8bc4 |
int used; /* chunk space used */
|
|
Packit |
4e8bc4 |
int nbytes; /* used. */
|
|
Packit |
4e8bc4 |
unsigned short refcount; /* used? */
|
|
Packit |
4e8bc4 |
uint16_t it_flags; /* ITEM_* above. */
|
|
Packit |
4e8bc4 |
uint8_t slabs_clsid; /* Same as above. */
|
|
Packit |
4e8bc4 |
uint8_t orig_clsid; /* For obj hdr chunks slabs_clsid is fake. */
|
|
Packit |
4e8bc4 |
char data[];
|
|
Packit |
4e8bc4 |
} item_chunk;
|
|
Packit |
4e8bc4 |
|
|
Packit |
4e8bc4 |
#ifdef NEED_ALIGN
|
|
Packit |
4e8bc4 |
static inline char *ITEM_schunk(item *it) {
|
|
Packit |
4e8bc4 |
int offset = it->nkey + 1
|
|
Packit |
4e8bc4 |
+ ((it->it_flags & ITEM_CFLAGS) ? sizeof(uint32_t) : 0)
|
|
Packit |
4e8bc4 |
+ ((it->it_flags & ITEM_CAS) ? sizeof(uint64_t) : 0);
|
|
Packit |
4e8bc4 |
int remain = offset % 8;
|
|
Packit |
4e8bc4 |
if (remain != 0) {
|
|
Packit |
4e8bc4 |
offset += 8 - remain;
|
|
Packit |
4e8bc4 |
}
|
|
Packit |
4e8bc4 |
return ((char *) &(it->data)) + offset;
|
|
Packit |
4e8bc4 |
}
|
|
Packit |
4e8bc4 |
#else
|
|
Packit |
4e8bc4 |
#define ITEM_schunk(item) ((char*) &((item)->data) + (item)->nkey + 1 \
|
|
Packit |
4e8bc4 |
+ (((item)->it_flags & ITEM_CFLAGS) ? sizeof(uint32_t) : 0) \
|
|
Packit |
4e8bc4 |
+ (((item)->it_flags & ITEM_CAS) ? sizeof(uint64_t) : 0))
|
|
Packit |
4e8bc4 |
#endif
|
|
Packit |
4e8bc4 |
|
|
Packit |
4e8bc4 |
#ifdef EXTSTORE
|
|
Packit |
4e8bc4 |
typedef struct {
|
|
Packit |
4e8bc4 |
unsigned int page_version; /* from IO header */
|
|
Packit |
4e8bc4 |
unsigned int offset; /* from IO header */
|
|
Packit |
4e8bc4 |
unsigned short page_id; /* from IO header */
|
|
Packit |
4e8bc4 |
} item_hdr;
|
|
Packit |
4e8bc4 |
#endif
|
|
Packit |
4e8bc4 |
typedef struct {
|
|
Packit |
4e8bc4 |
pthread_t thread_id; /* unique ID of this thread */
|
|
Packit |
4e8bc4 |
struct event_base *base; /* libevent handle this thread uses */
|
|
Packit |
4e8bc4 |
struct event notify_event; /* listen event for notify pipe */
|
|
Packit |
4e8bc4 |
int notify_receive_fd; /* receiving end of notify pipe */
|
|
Packit |
4e8bc4 |
int notify_send_fd; /* sending end of notify pipe */
|
|
Packit |
4e8bc4 |
struct thread_stats stats; /* Stats generated by this thread */
|
|
Packit |
4e8bc4 |
struct conn_queue *new_conn_queue; /* queue of new connections to handle */
|
|
Packit |
4e8bc4 |
cache_t *suffix_cache; /* suffix cache */
|
|
Packit |
4e8bc4 |
#ifdef EXTSTORE
|
|
Packit |
4e8bc4 |
cache_t *io_cache; /* IO objects */
|
|
Packit |
4e8bc4 |
void *storage; /* data object for storage system */
|
|
Packit |
4e8bc4 |
#endif
|
|
Packit |
4e8bc4 |
logger *l; /* logger buffer */
|
|
Packit |
4e8bc4 |
void *lru_bump_buf; /* async LRU bump buffer */
|
|
Packit |
4e8bc4 |
#ifdef TLS
|
|
Packit |
4e8bc4 |
char *ssl_wbuf;
|
|
Packit |
4e8bc4 |
#endif
|
|
Packit |
4e8bc4 |
|
|
Packit |
4e8bc4 |
} LIBEVENT_THREAD;
|
|
Packit |
4e8bc4 |
typedef struct conn conn;
|
|
Packit |
4e8bc4 |
#ifdef EXTSTORE
|
|
Packit |
4e8bc4 |
typedef struct _io_wrap {
|
|
Packit |
4e8bc4 |
obj_io io;
|
|
Packit |
4e8bc4 |
struct _io_wrap *next;
|
|
Packit |
4e8bc4 |
conn *c;
|
|
Packit |
4e8bc4 |
item *hdr_it; /* original header item. */
|
|
Packit |
4e8bc4 |
unsigned int iovec_start; /* start of the iovecs for this IO */
|
|
Packit |
4e8bc4 |
unsigned int iovec_count; /* total number of iovecs */
|
|
Packit |
4e8bc4 |
unsigned int iovec_data; /* specific index of data iovec */
|
|
Packit |
4e8bc4 |
bool miss; /* signal a miss to unlink hdr_it */
|
|
Packit |
4e8bc4 |
bool badcrc; /* signal a crc failure */
|
|
Packit |
4e8bc4 |
bool active; /* tells if IO was dispatched or not */
|
|
Packit |
4e8bc4 |
} io_wrap;
|
|
Packit |
4e8bc4 |
#endif
|
|
Packit |
4e8bc4 |
/**
|
|
Packit |
4e8bc4 |
* The structure representing a connection into memcached.
|
|
Packit |
4e8bc4 |
*/
|
|
Packit |
4e8bc4 |
struct conn {
|
|
Packit |
4e8bc4 |
sasl_conn_t *sasl_conn;
|
|
Packit |
4e8bc4 |
int sfd;
|
|
Packit |
4e8bc4 |
bool sasl_started;
|
|
Packit |
4e8bc4 |
bool authenticated;
|
|
Packit |
4e8bc4 |
bool set_stale;
|
|
Packit |
4e8bc4 |
bool mset_res; /** uses mset format for return code */
|
|
Packit |
4e8bc4 |
#ifdef TLS
|
|
Packit |
4e8bc4 |
SSL *ssl;
|
|
Packit |
4e8bc4 |
char *ssl_wbuf;
|
|
Packit |
4e8bc4 |
bool ssl_enabled;
|
|
Packit |
4e8bc4 |
#endif
|
|
Packit |
4e8bc4 |
enum conn_states state;
|
|
Packit |
4e8bc4 |
enum bin_substates substate;
|
|
Packit |
4e8bc4 |
rel_time_t last_cmd_time;
|
|
Packit |
4e8bc4 |
struct event event;
|
|
Packit |
4e8bc4 |
short ev_flags;
|
|
Packit |
4e8bc4 |
short which; /** which events were just triggered */
|
|
Packit |
4e8bc4 |
|
|
Packit |
4e8bc4 |
char *rbuf; /** buffer to read commands into */
|
|
Packit |
4e8bc4 |
char *rcurr; /** but if we parsed some already, this is where we stopped */
|
|
Packit |
4e8bc4 |
int rsize; /** total allocated size of rbuf */
|
|
Packit |
4e8bc4 |
int rbytes; /** how much data, starting from rcur, do we have unparsed */
|
|
Packit |
4e8bc4 |
|
|
Packit |
4e8bc4 |
char *wbuf;
|
|
Packit |
4e8bc4 |
char *wcurr;
|
|
Packit |
4e8bc4 |
int wsize;
|
|
Packit |
4e8bc4 |
int wbytes;
|
|
Packit |
4e8bc4 |
/** which state to go into after finishing current write */
|
|
Packit |
4e8bc4 |
enum conn_states write_and_go;
|
|
Packit |
4e8bc4 |
void *write_and_free; /** free this memory after finishing writing */
|
|
Packit |
4e8bc4 |
|
|
Packit |
4e8bc4 |
char *ritem; /** when we read in an item's value, it goes here */
|
|
Packit |
4e8bc4 |
int rlbytes;
|
|
Packit |
4e8bc4 |
|
|
Packit |
4e8bc4 |
/* data for the nread state */
|
|
Packit |
4e8bc4 |
|
|
Packit |
4e8bc4 |
/**
|
|
Packit |
4e8bc4 |
* item is used to hold an item structure created after reading the command
|
|
Packit |
4e8bc4 |
* line of set/add/replace commands, but before we finished reading the actual
|
|
Packit |
4e8bc4 |
* data. The data is read into ITEM_data(item) to avoid extra copying.
|
|
Packit |
4e8bc4 |
*/
|
|
Packit |
4e8bc4 |
|
|
Packit |
4e8bc4 |
void *item; /* for commands set/add/replace */
|
|
Packit |
4e8bc4 |
|
|
Packit |
4e8bc4 |
/* data for the swallow state */
|
|
Packit |
4e8bc4 |
int sbytes; /* how many bytes to swallow */
|
|
Packit |
4e8bc4 |
|
|
Packit |
4e8bc4 |
/* data for the mwrite state */
|
|
Packit |
4e8bc4 |
struct iovec *iov;
|
|
Packit |
4e8bc4 |
int iovsize; /* number of elements allocated in iov[] */
|
|
Packit |
4e8bc4 |
int iovused; /* number of elements used in iov[] */
|
|
Packit |
4e8bc4 |
|
|
Packit |
4e8bc4 |
struct msghdr *msglist;
|
|
Packit |
4e8bc4 |
int msgsize; /* number of elements allocated in msglist[] */
|
|
Packit |
4e8bc4 |
int msgused; /* number of elements used in msglist[] */
|
|
Packit |
4e8bc4 |
int msgcurr; /* element in msglist[] being transmitted now */
|
|
Packit |
4e8bc4 |
int msgbytes; /* number of bytes in current msg */
|
|
Packit |
4e8bc4 |
|
|
Packit |
4e8bc4 |
item **ilist; /* list of items to write out */
|
|
Packit |
4e8bc4 |
int isize;
|
|
Packit |
4e8bc4 |
item **icurr;
|
|
Packit |
4e8bc4 |
int ileft;
|
|
Packit |
4e8bc4 |
|
|
Packit |
4e8bc4 |
char **suffixlist;
|
|
Packit |
4e8bc4 |
int suffixsize;
|
|
Packit |
4e8bc4 |
char **suffixcurr;
|
|
Packit |
4e8bc4 |
int suffixleft;
|
|
Packit |
4e8bc4 |
#ifdef EXTSTORE
|
|
Packit |
4e8bc4 |
int io_wrapleft;
|
|
Packit |
4e8bc4 |
unsigned int recache_counter;
|
|
Packit |
4e8bc4 |
io_wrap *io_wraplist; /* linked list of io_wraps */
|
|
Packit |
4e8bc4 |
bool io_queued; /* FIXME: debugging flag */
|
|
Packit |
4e8bc4 |
#endif
|
|
Packit |
4e8bc4 |
enum protocol protocol; /* which protocol this connection speaks */
|
|
Packit |
4e8bc4 |
enum network_transport transport; /* what transport is used by this connection */
|
|
Packit |
4e8bc4 |
|
|
Packit |
4e8bc4 |
/* data for UDP clients */
|
|
Packit |
4e8bc4 |
int request_id; /* Incoming UDP request ID, if this is a UDP "connection" */
|
|
Packit |
4e8bc4 |
struct sockaddr_in6 request_addr; /* udp: Who sent the most recent request */
|
|
Packit |
4e8bc4 |
socklen_t request_addr_size;
|
|
Packit |
4e8bc4 |
unsigned char *hdrbuf; /* udp packet headers */
|
|
Packit |
4e8bc4 |
int hdrsize; /* number of headers' worth of space is allocated */
|
|
Packit |
4e8bc4 |
|
|
Packit |
4e8bc4 |
bool noreply; /* True if the reply should not be sent. */
|
|
Packit |
4e8bc4 |
/* current stats command */
|
|
Packit |
4e8bc4 |
struct {
|
|
Packit |
4e8bc4 |
char *buffer;
|
|
Packit |
4e8bc4 |
size_t size;
|
|
Packit |
4e8bc4 |
size_t offset;
|
|
Packit |
4e8bc4 |
} stats;
|
|
Packit |
4e8bc4 |
|
|
Packit |
4e8bc4 |
/* Binary protocol stuff */
|
|
Packit |
4e8bc4 |
/* This is where the binary header goes */
|
|
Packit |
4e8bc4 |
protocol_binary_request_header binary_header;
|
|
Packit |
4e8bc4 |
uint64_t cas; /* the cas to return */
|
|
Packit |
4e8bc4 |
short cmd; /* current command being processed */
|
|
Packit |
4e8bc4 |
int opaque;
|
|
Packit |
4e8bc4 |
int keylen;
|
|
Packit |
4e8bc4 |
conn *next; /* Used for generating a list of conn structures */
|
|
Packit |
4e8bc4 |
LIBEVENT_THREAD *thread; /* Pointer to the thread object serving this connection */
|
|
Packit |
4e8bc4 |
int (*try_read_command)(conn *c); /* pointer for top level input parser */
|
|
Packit |
4e8bc4 |
ssize_t (*read)(conn *c, void *buf, size_t count);
|
|
Packit |
4e8bc4 |
ssize_t (*sendmsg)(conn *c, struct msghdr *msg, int flags);
|
|
Packit |
4e8bc4 |
ssize_t (*write)(conn *c, void *buf, size_t count);
|
|
Packit |
4e8bc4 |
};
|
|
Packit |
4e8bc4 |
|
|
Packit |
4e8bc4 |
/* array of conn structures, indexed by file descriptor */
|
|
Packit |
4e8bc4 |
extern conn **conns;
|
|
Packit |
4e8bc4 |
|
|
Packit |
4e8bc4 |
/* current time of day (updated periodically) */
|
|
Packit |
4e8bc4 |
extern volatile rel_time_t current_time;
|
|
Packit |
4e8bc4 |
|
|
Packit |
4e8bc4 |
/* TODO: Move to slabs.h? */
|
|
Packit |
4e8bc4 |
extern volatile int slab_rebalance_signal;
|
|
Packit |
4e8bc4 |
|
|
Packit |
4e8bc4 |
struct slab_rebalance {
|
|
Packit |
4e8bc4 |
void *slab_start;
|
|
Packit |
4e8bc4 |
void *slab_end;
|
|
Packit |
4e8bc4 |
void *slab_pos;
|
|
Packit |
4e8bc4 |
int s_clsid;
|
|
Packit |
4e8bc4 |
int d_clsid;
|
|
Packit |
4e8bc4 |
uint32_t busy_items;
|
|
Packit |
4e8bc4 |
uint32_t rescues;
|
|
Packit |
4e8bc4 |
uint32_t evictions_nomem;
|
|
Packit |
4e8bc4 |
uint32_t inline_reclaim;
|
|
Packit |
4e8bc4 |
uint32_t chunk_rescues;
|
|
Packit |
4e8bc4 |
uint32_t busy_deletes;
|
|
Packit |
4e8bc4 |
uint32_t busy_loops;
|
|
Packit |
4e8bc4 |
uint8_t done;
|
|
Packit |
4e8bc4 |
uint8_t *completed;
|
|
Packit |
4e8bc4 |
};
|
|
Packit |
4e8bc4 |
|
|
Packit |
4e8bc4 |
extern struct slab_rebalance slab_rebal;
|
|
Packit |
4e8bc4 |
#ifdef EXTSTORE
|
|
Packit |
4e8bc4 |
extern void *ext_storage;
|
|
Packit |
4e8bc4 |
#endif
|
|
Packit |
4e8bc4 |
/*
|
|
Packit |
4e8bc4 |
* Functions
|
|
Packit |
4e8bc4 |
*/
|
|
Packit |
4e8bc4 |
void do_accept_new_conns(const bool do_accept);
|
|
Packit |
4e8bc4 |
enum delta_result_type do_add_delta(conn *c, const char *key,
|
|
Packit |
4e8bc4 |
const size_t nkey, const bool incr,
|
|
Packit |
4e8bc4 |
const int64_t delta, char *buf,
|
|
Packit |
4e8bc4 |
uint64_t *cas, const uint32_t hv);
|
|
Packit |
4e8bc4 |
enum store_item_type do_store_item(item *item, int comm, conn* c, const uint32_t hv);
|
|
Packit |
4e8bc4 |
conn *conn_new(const int sfd, const enum conn_states init_state, const int event_flags, const int read_buffer_size,
|
|
Packit |
4e8bc4 |
enum network_transport transport, struct event_base *base, void *ssl);
|
|
Packit |
4e8bc4 |
|
|
Packit |
4e8bc4 |
void conn_worker_readd(conn *c);
|
|
Packit |
4e8bc4 |
extern int daemonize(int nochdir, int noclose);
|
|
Packit |
4e8bc4 |
|
|
Packit |
4e8bc4 |
#define mutex_lock(x) pthread_mutex_lock(x)
|
|
Packit |
4e8bc4 |
#define mutex_unlock(x) pthread_mutex_unlock(x)
|
|
Packit |
4e8bc4 |
|
|
Packit |
4e8bc4 |
#include "stats_prefix.h"
|
|
Packit |
4e8bc4 |
#include "slabs.h"
|
|
Packit |
4e8bc4 |
#include "assoc.h"
|
|
Packit |
4e8bc4 |
#include "items.h"
|
|
Packit |
4e8bc4 |
#include "crawler.h"
|
|
Packit |
4e8bc4 |
#include "trace.h"
|
|
Packit |
4e8bc4 |
#include "hash.h"
|
|
Packit |
4e8bc4 |
#include "util.h"
|
|
Packit |
4e8bc4 |
|
|
Packit |
4e8bc4 |
/*
|
|
Packit |
4e8bc4 |
* Functions such as the libevent-related calls that need to do cross-thread
|
|
Packit |
4e8bc4 |
* communication in multithreaded mode (rather than actually doing the work
|
|
Packit |
4e8bc4 |
* in the current thread) are called via "dispatch_" frontends, which are
|
|
Packit |
4e8bc4 |
* also #define-d to directly call the underlying code in singlethreaded mode.
|
|
Packit |
4e8bc4 |
*/
|
|
Packit |
4e8bc4 |
void memcached_thread_init(int nthreads, void *arg);
|
|
Packit |
4e8bc4 |
void redispatch_conn(conn *c);
|
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void dispatch_conn_new(int sfd, enum conn_states init_state, int event_flags, int read_buffer_size,
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enum network_transport transport, void *ssl);
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void sidethread_conn_close(conn *c);
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/* Lock wrappers for cache functions that are called from main loop. */
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enum delta_result_type add_delta(conn *c, const char *key,
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const size_t nkey, bool incr,
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const int64_t delta, char *buf,
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uint64_t *cas);
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void accept_new_conns(const bool do_accept);
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void conn_close_idle(conn *c);
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void conn_close_all(void);
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item *item_alloc(char *key, size_t nkey, int flags, rel_time_t exptime, int nbytes);
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#define DO_UPDATE true
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#define DONT_UPDATE false
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item *item_get(const char *key, const size_t nkey, conn *c, const bool do_update);
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item *item_get_locked(const char *key, const size_t nkey, conn *c, const bool do_update, uint32_t *hv);
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item *item_touch(const char *key, const size_t nkey, uint32_t exptime, conn *c);
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int item_link(item *it);
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void item_remove(item *it);
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int item_replace(item *it, item *new_it, const uint32_t hv);
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void item_unlink(item *it);
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void item_lock(uint32_t hv);
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void *item_trylock(uint32_t hv);
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void item_trylock_unlock(void *arg);
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void item_unlock(uint32_t hv);
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void pause_threads(enum pause_thread_types type);
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void stop_threads(void);
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int stop_conn_timeout_thread(void);
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#define refcount_incr(it) ++(it->refcount)
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#define refcount_decr(it) --(it->refcount)
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void STATS_LOCK(void);
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void STATS_UNLOCK(void);
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void threadlocal_stats_reset(void);
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void threadlocal_stats_aggregate(struct thread_stats *stats);
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void slab_stats_aggregate(struct thread_stats *stats, struct slab_stats *out);
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/* Stat processing functions */
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void append_stat(const char *name, ADD_STAT add_stats, conn *c,
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const char *fmt, ...);
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enum store_item_type store_item(item *item, int comm, conn *c);
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#if HAVE_DROP_PRIVILEGES
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extern void setup_privilege_violations_handler(void);
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extern void drop_privileges(void);
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#else
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#define setup_privilege_violations_handler()
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#define drop_privileges()
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#endif
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#if HAVE_DROP_WORKER_PRIVILEGES
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extern void drop_worker_privileges(void);
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#else
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#define drop_worker_privileges()
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#endif
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/* If supported, give compiler hints for branch prediction. */
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#if !defined(__GNUC__) || (__GNUC__ == 2 && __GNUC_MINOR__ < 96)
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#define __builtin_expect(x, expected_value) (x)
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#endif
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#define likely(x) __builtin_expect((x),1)
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#define unlikely(x) __builtin_expect((x),0)
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