Adding upstream version 5:7.0.15.upstream/5%7.0.15upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 3605 insertions, 0 deletions

diff --git a/src/server.h b/src/server.h
new file mode 100644
index 0000000..82e4db9
--- /dev/null
+++ b/src/server.h
@@ -0,0 +1,3605 @@
+/*
+ * 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.
+ */
+
+#ifndef __REDIS_H
+#define __REDIS_H
+
+#include "fmacros.h"
+#include "config.h"
+#include "solarisfixes.h"
+#include "rio.h"
+#include "atomicvar.h"
+
+#include <assert.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+#include <limits.h>
+#include <unistd.h>
+#include <errno.h>
+#include <inttypes.h>
+#include <pthread.h>
+#include <syslog.h>
+#include <netinet/in.h>
+#include <sys/socket.h>
+#include <lua.h>
+#include <signal.h>
+#include "hdr_histogram.h"
+
+#ifdef HAVE_LIBSYSTEMD
+#include <systemd/sd-daemon.h>
+#endif
+
+#ifndef static_assert
+#define static_assert(expr, lit) extern char __static_assert_failure[(expr) ? 1:-1]
+#endif
+
+typedef long long mstime_t; /* millisecond time type. */
+typedef long long ustime_t; /* microsecond time type. */
+
+#include "ae.h"      /* Event driven programming library */
+#include "sds.h"     /* Dynamic safe strings */
+#include "dict.h"    /* Hash tables */
+#include "adlist.h"  /* Linked lists */
+#include "zmalloc.h" /* total memory usage aware version of malloc/free */
+#include "anet.h"    /* Networking the easy way */
+#include "intset.h"  /* Compact integer set structure */
+#include "version.h" /* Version macro */
+#include "util.h"    /* Misc functions useful in many places */
+#include "latency.h" /* Latency monitor API */
+#include "sparkline.h" /* ASCII graphs API */
+#include "quicklist.h"  /* Lists are encoded as linked lists of
+                           N-elements flat arrays */
+#include "rax.h"     /* Radix tree */
+#include "connection.h" /* Connection abstraction */
+
+#define REDISMODULE_CORE 1
+#include "redismodule.h"    /* Redis modules API defines. */
+
+/* Following includes allow test functions to be called from Redis main() */
+#include "zipmap.h"
+#include "ziplist.h" /* Compact list data structure */
+#include "sha1.h"
+#include "endianconv.h"
+#include "crc64.h"
+
+/* min/max */
+#undef min
+#undef max
+#define min(a, b) ((a) < (b) ? (a) : (b))
+#define max(a, b) ((a) > (b) ? (a) : (b))
+
+/* Error codes */
+#define C_OK                    0
+#define C_ERR                   -1
+
+/* Static server configuration */
+#define CONFIG_DEFAULT_HZ        10             /* Time interrupt calls/sec. */
+#define CONFIG_MIN_HZ            1
+#define CONFIG_MAX_HZ            500
+#define MAX_CLIENTS_PER_CLOCK_TICK 200          /* HZ is adapted based on that. */
+#define CRON_DBS_PER_CALL 16
+#define NET_MAX_WRITES_PER_EVENT (1024*64)
+#define PROTO_SHARED_SELECT_CMDS 10
+#define OBJ_SHARED_INTEGERS 10000
+#define OBJ_SHARED_BULKHDR_LEN 32
+#define OBJ_SHARED_HDR_STRLEN(_len_) (((_len_) < 10) ? 4 : 5) /* see shared.mbulkhdr etc. */
+#define LOG_MAX_LEN    1024 /* Default maximum length of syslog messages.*/
+#define AOF_REWRITE_ITEMS_PER_CMD 64
+#define AOF_ANNOTATION_LINE_MAX_LEN 1024
+#define CONFIG_RUN_ID_SIZE 40
+#define RDB_EOF_MARK_SIZE 40
+#define CONFIG_REPL_BACKLOG_MIN_SIZE (1024*16)          /* 16k */
+#define CONFIG_BGSAVE_RETRY_DELAY 5 /* Wait a few secs before trying again. */
+#define CONFIG_DEFAULT_PID_FILE "/var/run/redis.pid"
+#define CONFIG_DEFAULT_BINDADDR_COUNT 2
+#define CONFIG_DEFAULT_BINDADDR { "*", "-::*" }
+#define NET_HOST_STR_LEN 256 /* Longest valid hostname */
+#define NET_IP_STR_LEN 46 /* INET6_ADDRSTRLEN is 46, but we need to be sure */
+#define NET_ADDR_STR_LEN (NET_IP_STR_LEN+32) /* Must be enough for ip:port */
+#define NET_HOST_PORT_STR_LEN (NET_HOST_STR_LEN+32) /* Must be enough for hostname:port */
+#define CONFIG_BINDADDR_MAX 16
+#define CONFIG_MIN_RESERVED_FDS 32
+#define CONFIG_DEFAULT_PROC_TITLE_TEMPLATE "{title} {listen-addr} {server-mode}"
+
+/* Bucket sizes for client eviction pools. Each bucket stores clients with
+ * memory usage of up to twice the size of the bucket below it. */
+#define CLIENT_MEM_USAGE_BUCKET_MIN_LOG 15 /* Bucket sizes start at up to 32KB (2^15) */
+#define CLIENT_MEM_USAGE_BUCKET_MAX_LOG 33 /* Bucket for largest clients: sizes above 4GB (2^32) */
+#define CLIENT_MEM_USAGE_BUCKETS (1+CLIENT_MEM_USAGE_BUCKET_MAX_LOG-CLIENT_MEM_USAGE_BUCKET_MIN_LOG)
+
+#define ACTIVE_EXPIRE_CYCLE_SLOW 0
+#define ACTIVE_EXPIRE_CYCLE_FAST 1
+
+/* Children process will exit with this status code to signal that the
+ * process terminated without an error: this is useful in order to kill
+ * a saving child (RDB or AOF one), without triggering in the parent the
+ * write protection that is normally turned on on write errors.
+ * Usually children that are terminated with SIGUSR1 will exit with this
+ * special code. */
+#define SERVER_CHILD_NOERROR_RETVAL    255
+
+/* Reading copy-on-write info is sometimes expensive and may slow down child
+ * processes that report it continuously. We measure the cost of obtaining it
+ * and hold back additional reading based on this factor. */
+#define CHILD_COW_DUTY_CYCLE           100
+
+/* Instantaneous metrics tracking. */
+#define STATS_METRIC_SAMPLES 16     /* Number of samples per metric. */
+#define STATS_METRIC_COMMAND 0      /* Number of commands executed. */
+#define STATS_METRIC_NET_INPUT 1    /* Bytes read to network. */
+#define STATS_METRIC_NET_OUTPUT 2   /* Bytes written to network. */
+#define STATS_METRIC_NET_INPUT_REPLICATION 3   /* Bytes read to network during replication. */
+#define STATS_METRIC_NET_OUTPUT_REPLICATION 4   /* Bytes written to network during replication. */
+#define STATS_METRIC_COUNT 5
+
+/* Protocol and I/O related defines */
+#define PROTO_IOBUF_LEN         (1024*16)  /* Generic I/O buffer size */
+#define PROTO_REPLY_CHUNK_BYTES (16*1024) /* 16k output buffer */
+#define PROTO_INLINE_MAX_SIZE   (1024*64) /* Max size of inline reads */
+#define PROTO_MBULK_BIG_ARG     (1024*32)
+#define PROTO_RESIZE_THRESHOLD  (1024*32) /* Threshold for determining whether to resize query buffer */
+#define PROTO_REPLY_MIN_BYTES   (1024) /* the lower limit on reply buffer size */
+#define REDIS_AUTOSYNC_BYTES (1024*1024*4) /* Sync file every 4MB. */
+
+#define REPLY_BUFFER_DEFAULT_PEAK_RESET_TIME 5000 /* 5 seconds */
+
+/* When configuring the server eventloop, we setup it so that the total number
+ * of file descriptors we can handle are server.maxclients + RESERVED_FDS +
+ * a few more to stay safe. Since RESERVED_FDS defaults to 32, we add 96
+ * in order to make sure of not over provisioning more than 128 fds. */
+#define CONFIG_FDSET_INCR (CONFIG_MIN_RESERVED_FDS+96)
+
+/* OOM Score Adjustment classes. */
+#define CONFIG_OOM_MASTER 0
+#define CONFIG_OOM_REPLICA 1
+#define CONFIG_OOM_BGCHILD 2
+#define CONFIG_OOM_COUNT 3
+
+extern int configOOMScoreAdjValuesDefaults[CONFIG_OOM_COUNT];
+
+/* Hash table parameters */
+#define HASHTABLE_MIN_FILL        10      /* Minimal hash table fill 10% */
+#define HASHTABLE_MAX_LOAD_FACTOR 1.618   /* Maximum hash table load factor. */
+
+/* Command flags. Please check the definition of struct redisCommand in this file
+ * for more information about the meaning of every flag. */
+#define CMD_WRITE (1ULL<<0)
+#define CMD_READONLY (1ULL<<1)
+#define CMD_DENYOOM (1ULL<<2)
+#define CMD_MODULE (1ULL<<3)           /* Command exported by module. */
+#define CMD_ADMIN (1ULL<<4)
+#define CMD_PUBSUB (1ULL<<5)
+#define CMD_NOSCRIPT (1ULL<<6)
+#define CMD_BLOCKING (1ULL<<8)       /* Has potential to block. */
+#define CMD_LOADING (1ULL<<9)
+#define CMD_STALE (1ULL<<10)
+#define CMD_SKIP_MONITOR (1ULL<<11)
+#define CMD_SKIP_SLOWLOG (1ULL<<12)
+#define CMD_ASKING (1ULL<<13)
+#define CMD_FAST (1ULL<<14)
+#define CMD_NO_AUTH (1ULL<<15)
+#define CMD_MAY_REPLICATE (1ULL<<16)
+#define CMD_SENTINEL (1ULL<<17)
+#define CMD_ONLY_SENTINEL (1ULL<<18)
+#define CMD_NO_MANDATORY_KEYS (1ULL<<19)
+#define CMD_PROTECTED (1ULL<<20)
+#define CMD_MODULE_GETKEYS (1ULL<<21)  /* Use the modules getkeys interface. */
+#define CMD_MODULE_NO_CLUSTER (1ULL<<22) /* Deny on Redis Cluster. */
+#define CMD_NO_ASYNC_LOADING (1ULL<<23)
+#define CMD_NO_MULTI (1ULL<<24)
+#define CMD_MOVABLE_KEYS (1ULL<<25) /* The legacy range spec doesn't cover all keys.
+                                     * Populated by populateCommandLegacyRangeSpec. */
+#define CMD_ALLOW_BUSY ((1ULL<<26))
+#define CMD_MODULE_GETCHANNELS (1ULL<<27)  /* Use the modules getchannels interface. */
+#define CMD_TOUCHES_ARBITRARY_KEYS (1ULL<<28)
+
+/* Command flags that describe ACLs categories. */
+#define ACL_CATEGORY_KEYSPACE (1ULL<<0)
+#define ACL_CATEGORY_READ (1ULL<<1)
+#define ACL_CATEGORY_WRITE (1ULL<<2)
+#define ACL_CATEGORY_SET (1ULL<<3)
+#define ACL_CATEGORY_SORTEDSET (1ULL<<4)
+#define ACL_CATEGORY_LIST (1ULL<<5)
+#define ACL_CATEGORY_HASH (1ULL<<6)
+#define ACL_CATEGORY_STRING (1ULL<<7)
+#define ACL_CATEGORY_BITMAP (1ULL<<8)
+#define ACL_CATEGORY_HYPERLOGLOG (1ULL<<9)
+#define ACL_CATEGORY_GEO (1ULL<<10)
+#define ACL_CATEGORY_STREAM (1ULL<<11)
+#define ACL_CATEGORY_PUBSUB (1ULL<<12)
+#define ACL_CATEGORY_ADMIN (1ULL<<13)
+#define ACL_CATEGORY_FAST (1ULL<<14)
+#define ACL_CATEGORY_SLOW (1ULL<<15)
+#define ACL_CATEGORY_BLOCKING (1ULL<<16)
+#define ACL_CATEGORY_DANGEROUS (1ULL<<17)
+#define ACL_CATEGORY_CONNECTION (1ULL<<18)
+#define ACL_CATEGORY_TRANSACTION (1ULL<<19)
+#define ACL_CATEGORY_SCRIPTING (1ULL<<20)
+
+/* Key-spec flags *
+ * -------------- */
+/* The following refer what the command actually does with the value or metadata
+ * of the key, and not necessarily the user data or how it affects it.
+ * Each key-spec may must have exactly one of these. Any operation that's not
+ * distinctly deletion, overwrite or read-only would be marked as RW. */
+#define CMD_KEY_RO (1ULL<<0)     /* Read-Only - Reads the value of the key, but
+                                  * doesn't necessarily returns it. */
+#define CMD_KEY_RW (1ULL<<1)     /* Read-Write - Modifies the data stored in the
+                                  * value of the key or its metadata. */
+#define CMD_KEY_OW (1ULL<<2)     /* Overwrite - Overwrites the data stored in
+                                  * the value of the key. */
+#define CMD_KEY_RM (1ULL<<3)     /* Deletes the key. */
+/* The following refer to user data inside the value of the key, not the metadata
+ * like LRU, type, cardinality. It refers to the logical operation on the user's
+ * data (actual input strings / TTL), being used / returned / copied / changed,
+ * It doesn't refer to modification or returning of metadata (like type, count,
+ * presence of data). Any write that's not INSERT or DELETE, would be an UPDATE.
+ * Each key-spec may have one of the writes with or without access, or none: */
+#define CMD_KEY_ACCESS (1ULL<<4) /* Returns, copies or uses the user data from
+                                  * the value of the key. */
+#define CMD_KEY_UPDATE (1ULL<<5) /* Updates data to the value, new value may
+                                  * depend on the old value. */
+#define CMD_KEY_INSERT (1ULL<<6) /* Adds data to the value with no chance of
+                                  * modification or deletion of existing data. */
+#define CMD_KEY_DELETE (1ULL<<7) /* Explicitly deletes some content
+                                  * from the value of the key. */
+/* Other flags: */
+#define CMD_KEY_NOT_KEY (1ULL<<8)     /* A 'fake' key that should be routed
+                                       * like a key in cluster mode but is 
+                                       * excluded from other key checks. */
+#define CMD_KEY_INCOMPLETE (1ULL<<9)  /* Means that the keyspec might not point
+                                       * out to all keys it should cover */
+#define CMD_KEY_VARIABLE_FLAGS (1ULL<<10)  /* Means that some keys might have
+                                            * different flags depending on arguments */
+
+/* Key flags for when access type is unknown */
+#define CMD_KEY_FULL_ACCESS (CMD_KEY_RW | CMD_KEY_ACCESS | CMD_KEY_UPDATE)
+
+/* Channel flags share the same flag space as the key flags */
+#define CMD_CHANNEL_PATTERN (1ULL<<11)     /* The argument is a channel pattern */
+#define CMD_CHANNEL_SUBSCRIBE (1ULL<<12)   /* The command subscribes to channels */
+#define CMD_CHANNEL_UNSUBSCRIBE (1ULL<<13) /* The command unsubscribes to channels */
+#define CMD_CHANNEL_PUBLISH (1ULL<<14)     /* The command publishes to channels. */
+
+/* AOF states */
+#define AOF_OFF 0             /* AOF is off */
+#define AOF_ON 1              /* AOF is on */
+#define AOF_WAIT_REWRITE 2    /* AOF waits rewrite to start appending */
+
+/* AOF return values for loadAppendOnlyFiles() and loadSingleAppendOnlyFile() */
+#define AOF_OK 0
+#define AOF_NOT_EXIST 1
+#define AOF_EMPTY 2
+#define AOF_OPEN_ERR 3
+#define AOF_FAILED 4
+#define AOF_TRUNCATED 5
+
+/* Command doc flags */
+#define CMD_DOC_NONE 0
+#define CMD_DOC_DEPRECATED (1<<0) /* Command is deprecated */
+#define CMD_DOC_SYSCMD (1<<1) /* System (internal) command */
+
+/* Client flags */
+#define CLIENT_SLAVE (1<<0)   /* This client is a replica */
+#define CLIENT_MASTER (1<<1)  /* This client is a master */
+#define CLIENT_MONITOR (1<<2) /* This client is a slave monitor, see MONITOR */
+#define CLIENT_MULTI (1<<3)   /* This client is in a MULTI context */
+#define CLIENT_BLOCKED (1<<4) /* The client is waiting in a blocking operation */
+#define CLIENT_DIRTY_CAS (1<<5) /* Watched keys modified. EXEC will fail. */
+#define CLIENT_CLOSE_AFTER_REPLY (1<<6) /* Close after writing entire reply. */
+#define CLIENT_UNBLOCKED (1<<7) /* This client was unblocked and is stored in
+                                  server.unblocked_clients */
+#define CLIENT_SCRIPT (1<<8) /* This is a non connected client used by Lua */
+#define CLIENT_ASKING (1<<9)     /* Client issued the ASKING command */
+#define CLIENT_CLOSE_ASAP (1<<10)/* Close this client ASAP */
+#define CLIENT_UNIX_SOCKET (1<<11) /* Client connected via Unix domain socket */
+#define CLIENT_DIRTY_EXEC (1<<12)  /* EXEC will fail for errors while queueing */
+#define CLIENT_MASTER_FORCE_REPLY (1<<13)  /* Queue replies even if is master */
+#define CLIENT_FORCE_AOF (1<<14)   /* Force AOF propagation of current cmd. */
+#define CLIENT_FORCE_REPL (1<<15)  /* Force replication of current cmd. */
+#define CLIENT_PRE_PSYNC (1<<16)   /* Instance don't understand PSYNC. */
+#define CLIENT_READONLY (1<<17)    /* Cluster client is in read-only state. */
+#define CLIENT_PUBSUB (1<<18)      /* Client is in Pub/Sub mode. */
+#define CLIENT_PREVENT_AOF_PROP (1<<19)  /* Don't propagate to AOF. */
+#define CLIENT_PREVENT_REPL_PROP (1<<20)  /* Don't propagate to slaves. */
+#define CLIENT_PREVENT_PROP (CLIENT_PREVENT_AOF_PROP|CLIENT_PREVENT_REPL_PROP)
+#define CLIENT_PENDING_WRITE (1<<21) /* Client has output to send but a write
+                                        handler is yet not installed. */
+#define CLIENT_REPLY_OFF (1<<22)   /* Don't send replies to client. */
+#define CLIENT_REPLY_SKIP_NEXT (1<<23)  /* Set CLIENT_REPLY_SKIP for next cmd */
+#define CLIENT_REPLY_SKIP (1<<24)  /* Don't send just this reply. */
+#define CLIENT_LUA_DEBUG (1<<25)  /* Run EVAL in debug mode. */
+#define CLIENT_LUA_DEBUG_SYNC (1<<26)  /* EVAL debugging without fork() */
+#define CLIENT_MODULE (1<<27) /* Non connected client used by some module. */
+#define CLIENT_PROTECTED (1<<28) /* Client should not be freed for now. */
+/* #define CLIENT_... (1<<29) currently unused, feel free to use in the future */
+#define CLIENT_PENDING_COMMAND (1<<30) /* Indicates the client has a fully
+                                        * parsed command ready for execution. */
+#define CLIENT_TRACKING (1ULL<<31) /* Client enabled keys tracking in order to
+                                   perform client side caching. */
+#define CLIENT_TRACKING_BROKEN_REDIR (1ULL<<32) /* Target client is invalid. */
+#define CLIENT_TRACKING_BCAST (1ULL<<33) /* Tracking in BCAST mode. */
+#define CLIENT_TRACKING_OPTIN (1ULL<<34)  /* Tracking in opt-in mode. */
+#define CLIENT_TRACKING_OPTOUT (1ULL<<35) /* Tracking in opt-out mode. */
+#define CLIENT_TRACKING_CACHING (1ULL<<36) /* CACHING yes/no was given,
+                                              depending on optin/optout mode. */
+#define CLIENT_TRACKING_NOLOOP (1ULL<<37) /* Don't send invalidation messages
+                                             about writes performed by myself.*/
+#define CLIENT_IN_TO_TABLE (1ULL<<38) /* This client is in the timeout table. */
+#define CLIENT_PROTOCOL_ERROR (1ULL<<39) /* Protocol error chatting with it. */
+#define CLIENT_CLOSE_AFTER_COMMAND (1ULL<<40) /* Close after executing commands
+                                               * and writing entire reply. */
+#define CLIENT_DENY_BLOCKING (1ULL<<41) /* Indicate that the client should not be blocked.
+                                           currently, turned on inside MULTI, Lua, RM_Call,
+                                           and AOF client */
+#define CLIENT_REPL_RDBONLY (1ULL<<42) /* This client is a replica that only wants
+                                          RDB without replication buffer. */
+#define CLIENT_NO_EVICT (1ULL<<43) /* This client is protected against client
+                                      memory eviction. */
+#define CLIENT_PUSHING (1ULL<<44) /* This client is pushing notifications. */
+
+/* Client block type (btype field in client structure)
+ * if CLIENT_BLOCKED flag is set. */
+#define BLOCKED_NONE 0    /* Not blocked, no CLIENT_BLOCKED flag set. */
+#define BLOCKED_LIST 1    /* BLPOP & co. */
+#define BLOCKED_WAIT 2    /* WAIT for synchronous replication. */
+#define BLOCKED_MODULE 3  /* Blocked by a loadable module. */
+#define BLOCKED_STREAM 4  /* XREAD. */
+#define BLOCKED_ZSET 5    /* BZPOP et al. */
+#define BLOCKED_POSTPONE 6 /* Blocked by processCommand, re-try processing later. */
+#define BLOCKED_SHUTDOWN 7 /* SHUTDOWN. */
+#define BLOCKED_NUM 8      /* Number of blocked states. */
+
+/* Client request types */
+#define PROTO_REQ_INLINE 1
+#define PROTO_REQ_MULTIBULK 2
+
+/* Client classes for client limits, currently used only for
+ * the max-client-output-buffer limit implementation. */
+#define CLIENT_TYPE_NORMAL 0 /* Normal req-reply clients + MONITORs */
+#define CLIENT_TYPE_SLAVE 1  /* Slaves. */
+#define CLIENT_TYPE_PUBSUB 2 /* Clients subscribed to PubSub channels. */
+#define CLIENT_TYPE_MASTER 3 /* Master. */
+#define CLIENT_TYPE_COUNT 4  /* Total number of client types. */
+#define CLIENT_TYPE_OBUF_COUNT 3 /* Number of clients to expose to output
+                                    buffer configuration. Just the first
+                                    three: normal, slave, pubsub. */
+
+/* Slave replication state. Used in server.repl_state for slaves to remember
+ * what to do next. */
+typedef enum {
+    REPL_STATE_NONE = 0,            /* No active replication */
+    REPL_STATE_CONNECT,             /* Must connect to master */
+    REPL_STATE_CONNECTING,          /* Connecting to master */
+    /* --- Handshake states, must be ordered --- */
+    REPL_STATE_RECEIVE_PING_REPLY,  /* Wait for PING reply */
+    REPL_STATE_SEND_HANDSHAKE,      /* Send handshake sequence to master */
+    REPL_STATE_RECEIVE_AUTH_REPLY,  /* Wait for AUTH reply */
+    REPL_STATE_RECEIVE_PORT_REPLY,  /* Wait for REPLCONF reply */
+    REPL_STATE_RECEIVE_IP_REPLY,    /* Wait for REPLCONF reply */
+    REPL_STATE_RECEIVE_CAPA_REPLY,  /* Wait for REPLCONF reply */
+    REPL_STATE_SEND_PSYNC,          /* Send PSYNC */
+    REPL_STATE_RECEIVE_PSYNC_REPLY, /* Wait for PSYNC reply */
+    /* --- End of handshake states --- */
+    REPL_STATE_TRANSFER,        /* Receiving .rdb from master */
+    REPL_STATE_CONNECTED,       /* Connected to master */
+} repl_state;
+
+/* The state of an in progress coordinated failover */
+typedef enum {
+    NO_FAILOVER = 0,        /* No failover in progress */
+    FAILOVER_WAIT_FOR_SYNC, /* Waiting for target replica to catch up */
+    FAILOVER_IN_PROGRESS    /* Waiting for target replica to accept
+                             * PSYNC FAILOVER request. */
+} failover_state;
+
+/* State of slaves from the POV of the master. Used in client->replstate.
+ * In SEND_BULK and ONLINE state the slave receives new updates
+ * in its output queue. In the WAIT_BGSAVE states instead the server is waiting
+ * to start the next background saving in order to send updates to it. */
+#define SLAVE_STATE_WAIT_BGSAVE_START 6 /* We need to produce a new RDB file. */
+#define SLAVE_STATE_WAIT_BGSAVE_END 7 /* Waiting RDB file creation to finish. */
+#define SLAVE_STATE_SEND_BULK 8 /* Sending RDB file to slave. */
+#define SLAVE_STATE_ONLINE 9 /* RDB file transmitted, sending just updates. */
+#define SLAVE_STATE_RDB_TRANSMITTED 10 /* RDB file transmitted - This state is used only for
+                                        * a replica that only wants RDB without replication buffer  */
+
+/* Slave capabilities. */
+#define SLAVE_CAPA_NONE 0
+#define SLAVE_CAPA_EOF (1<<0)    /* Can parse the RDB EOF streaming format. */
+#define SLAVE_CAPA_PSYNC2 (1<<1) /* Supports PSYNC2 protocol. */
+
+/* Slave requirements */
+#define SLAVE_REQ_NONE 0
+#define SLAVE_REQ_RDB_EXCLUDE_DATA (1 << 0)      /* Exclude data from RDB */
+#define SLAVE_REQ_RDB_EXCLUDE_FUNCTIONS (1 << 1) /* Exclude functions from RDB */
+/* Mask of all bits in the slave requirements bitfield that represent non-standard (filtered) RDB requirements */
+#define SLAVE_REQ_RDB_MASK (SLAVE_REQ_RDB_EXCLUDE_DATA | SLAVE_REQ_RDB_EXCLUDE_FUNCTIONS)
+
+/* Synchronous read timeout - slave side */
+#define CONFIG_REPL_SYNCIO_TIMEOUT 5
+
+/* The default number of replication backlog blocks to trim per call. */
+#define REPL_BACKLOG_TRIM_BLOCKS_PER_CALL 64
+
+/* In order to quickly find the requested offset for PSYNC requests,
+ * we index some nodes in the replication buffer linked list into a rax. */
+#define REPL_BACKLOG_INDEX_PER_BLOCKS 64
+
+/* List related stuff */
+#define LIST_HEAD 0
+#define LIST_TAIL 1
+#define ZSET_MIN 0
+#define ZSET_MAX 1
+
+/* Sort operations */
+#define SORT_OP_GET 0
+
+/* Log levels */
+#define LL_DEBUG 0
+#define LL_VERBOSE 1
+#define LL_NOTICE 2
+#define LL_WARNING 3
+#define LL_RAW (1<<10) /* Modifier to log without timestamp */
+
+/* Supervision options */
+#define SUPERVISED_NONE 0
+#define SUPERVISED_AUTODETECT 1
+#define SUPERVISED_SYSTEMD 2
+#define SUPERVISED_UPSTART 3
+
+/* Anti-warning macro... */
+#define UNUSED(V) ((void) V)
+
+#define ZSKIPLIST_MAXLEVEL 32 /* Should be enough for 2^64 elements */
+#define ZSKIPLIST_P 0.25      /* Skiplist P = 1/4 */
+
+/* Append only defines */
+#define AOF_FSYNC_NO 0
+#define AOF_FSYNC_ALWAYS 1
+#define AOF_FSYNC_EVERYSEC 2
+
+/* Replication diskless load defines */
+#define REPL_DISKLESS_LOAD_DISABLED 0
+#define REPL_DISKLESS_LOAD_WHEN_DB_EMPTY 1
+#define REPL_DISKLESS_LOAD_SWAPDB 2
+
+/* TLS Client Authentication */
+#define TLS_CLIENT_AUTH_NO 0
+#define TLS_CLIENT_AUTH_YES 1
+#define TLS_CLIENT_AUTH_OPTIONAL 2
+
+/* Sanitize dump payload */
+#define SANITIZE_DUMP_NO 0
+#define SANITIZE_DUMP_YES 1
+#define SANITIZE_DUMP_CLIENTS 2
+
+/* Enable protected config/command */
+#define PROTECTED_ACTION_ALLOWED_NO 0
+#define PROTECTED_ACTION_ALLOWED_YES 1
+#define PROTECTED_ACTION_ALLOWED_LOCAL 2
+
+/* Sets operations codes */
+#define SET_OP_UNION 0
+#define SET_OP_DIFF 1
+#define SET_OP_INTER 2
+
+/* oom-score-adj defines */
+#define OOM_SCORE_ADJ_NO 0
+#define OOM_SCORE_RELATIVE 1
+#define OOM_SCORE_ADJ_ABSOLUTE 2
+
+/* Redis maxmemory strategies. Instead of using just incremental number
+ * for this defines, we use a set of flags so that testing for certain
+ * properties common to multiple policies is faster. */
+#define MAXMEMORY_FLAG_LRU (1<<0)
+#define MAXMEMORY_FLAG_LFU (1<<1)
+#define MAXMEMORY_FLAG_ALLKEYS (1<<2)
+#define MAXMEMORY_FLAG_NO_SHARED_INTEGERS \
+    (MAXMEMORY_FLAG_LRU|MAXMEMORY_FLAG_LFU)
+
+#define MAXMEMORY_VOLATILE_LRU ((0<<8)|MAXMEMORY_FLAG_LRU)
+#define MAXMEMORY_VOLATILE_LFU ((1<<8)|MAXMEMORY_FLAG_LFU)
+#define MAXMEMORY_VOLATILE_TTL (2<<8)
+#define MAXMEMORY_VOLATILE_RANDOM (3<<8)
+#define MAXMEMORY_ALLKEYS_LRU ((4<<8)|MAXMEMORY_FLAG_LRU|MAXMEMORY_FLAG_ALLKEYS)
+#define MAXMEMORY_ALLKEYS_LFU ((5<<8)|MAXMEMORY_FLAG_LFU|MAXMEMORY_FLAG_ALLKEYS)
+#define MAXMEMORY_ALLKEYS_RANDOM ((6<<8)|MAXMEMORY_FLAG_ALLKEYS)
+#define MAXMEMORY_NO_EVICTION (7<<8)
+
+/* Units */
+#define UNIT_SECONDS 0
+#define UNIT_MILLISECONDS 1
+
+/* SHUTDOWN flags */
+#define SHUTDOWN_NOFLAGS 0      /* No flags. */
+#define SHUTDOWN_SAVE 1         /* Force SAVE on SHUTDOWN even if no save
+                                   points are configured. */
+#define SHUTDOWN_NOSAVE 2       /* Don't SAVE on SHUTDOWN. */
+#define SHUTDOWN_NOW 4          /* Don't wait for replicas to catch up. */
+#define SHUTDOWN_FORCE 8        /* Don't let errors prevent shutdown. */
+
+/* Command call flags, see call() function */
+#define CMD_CALL_NONE 0
+#define CMD_CALL_SLOWLOG (1<<0)
+#define CMD_CALL_STATS (1<<1)
+#define CMD_CALL_PROPAGATE_AOF (1<<2)
+#define CMD_CALL_PROPAGATE_REPL (1<<3)
+#define CMD_CALL_PROPAGATE (CMD_CALL_PROPAGATE_AOF|CMD_CALL_PROPAGATE_REPL)
+#define CMD_CALL_FULL (CMD_CALL_SLOWLOG | CMD_CALL_STATS | CMD_CALL_PROPAGATE)
+#define CMD_CALL_FROM_MODULE (1<<4)  /* From RM_Call */
+
+/* Command propagation flags, see propagateNow() function */
+#define PROPAGATE_NONE 0
+#define PROPAGATE_AOF 1
+#define PROPAGATE_REPL 2
+
+/* Client pause types, larger types are more restrictive
+ * pause types than smaller pause types. */
+typedef enum {
+    CLIENT_PAUSE_OFF = 0, /* Pause no commands */
+    CLIENT_PAUSE_WRITE,   /* Pause write commands */
+    CLIENT_PAUSE_ALL      /* Pause all commands */
+} pause_type;
+
+/* Client pause purposes. Each purpose has its own end time and pause type. */
+typedef enum {
+    PAUSE_BY_CLIENT_COMMAND = 0,
+    PAUSE_DURING_SHUTDOWN,
+    PAUSE_DURING_FAILOVER,
+    NUM_PAUSE_PURPOSES /* This value is the number of purposes above. */
+} pause_purpose;
+
+typedef struct {
+    pause_type type;
+    mstime_t end;
+} pause_event;
+
+/* Ways that a clusters endpoint can be described */
+typedef enum {
+    CLUSTER_ENDPOINT_TYPE_IP = 0,          /* Show IP address */
+    CLUSTER_ENDPOINT_TYPE_HOSTNAME,        /* Show hostname */
+    CLUSTER_ENDPOINT_TYPE_UNKNOWN_ENDPOINT /* Show NULL or empty */
+} cluster_endpoint_type;
+
+/* RDB active child save type. */
+#define RDB_CHILD_TYPE_NONE 0
+#define RDB_CHILD_TYPE_DISK 1     /* RDB is written to disk. */
+#define RDB_CHILD_TYPE_SOCKET 2   /* RDB is written to slave socket. */
+
+/* Keyspace changes notification classes. Every class is associated with a
+ * character for configuration purposes. */
+#define NOTIFY_KEYSPACE (1<<0)    /* K */
+#define NOTIFY_KEYEVENT (1<<1)    /* E */
+#define NOTIFY_GENERIC (1<<2)     /* g */
+#define NOTIFY_STRING (1<<3)      /* $ */
+#define NOTIFY_LIST (1<<4)        /* l */
+#define NOTIFY_SET (1<<5)         /* s */
+#define NOTIFY_HASH (1<<6)        /* h */
+#define NOTIFY_ZSET (1<<7)        /* z */
+#define NOTIFY_EXPIRED (1<<8)     /* x */
+#define NOTIFY_EVICTED (1<<9)     /* e */
+#define NOTIFY_STREAM (1<<10)     /* t */
+#define NOTIFY_KEY_MISS (1<<11)   /* m (Note: This one is excluded from NOTIFY_ALL on purpose) */
+#define NOTIFY_LOADED (1<<12)     /* module only key space notification, indicate a key loaded from rdb */
+#define NOTIFY_MODULE (1<<13)     /* d, module key space notification */
+#define NOTIFY_NEW (1<<14)        /* n, new key notification */
+#define NOTIFY_ALL (NOTIFY_GENERIC | NOTIFY_STRING | NOTIFY_LIST | NOTIFY_SET | NOTIFY_HASH | NOTIFY_ZSET | NOTIFY_EXPIRED | NOTIFY_EVICTED | NOTIFY_STREAM | NOTIFY_MODULE) /* A flag */
+
+/* Using the following macro you can run code inside serverCron() with the
+ * specified period, specified in milliseconds.
+ * The actual resolution depends on server.hz. */
+#define run_with_period(_ms_) if ((_ms_ <= 1000/server.hz) || !(server.cronloops%((_ms_)/(1000/server.hz))))
+
+/* We can print the stacktrace, so our assert is defined this way: */
+#define serverAssertWithInfo(_c,_o,_e) ((_e)?(void)0 : (_serverAssertWithInfo(_c,_o,#_e,__FILE__,__LINE__),redis_unreachable()))
+#define serverAssert(_e) ((_e)?(void)0 : (_serverAssert(#_e,__FILE__,__LINE__),redis_unreachable()))
+#define serverPanic(...) _serverPanic(__FILE__,__LINE__,__VA_ARGS__),redis_unreachable()
+
+/* latency histogram per command init settings */
+#define LATENCY_HISTOGRAM_MIN_VALUE 1L        /* >= 1 nanosec */
+#define LATENCY_HISTOGRAM_MAX_VALUE 1000000000L  /* <= 1 secs */
+#define LATENCY_HISTOGRAM_PRECISION 2  /* Maintain a value precision of 2 significant digits across LATENCY_HISTOGRAM_MIN_VALUE and LATENCY_HISTOGRAM_MAX_VALUE range.
+                                        * Value quantization within the range will thus be no larger than 1/100th (or 1%) of any value.
+                                        * The total size per histogram should sit around 40 KiB Bytes. */
+
+/* Busy module flags, see busy_module_yield_flags */
+#define BUSY_MODULE_YIELD_NONE (0)
+#define BUSY_MODULE_YIELD_EVENTS (1<<0)
+#define BUSY_MODULE_YIELD_CLIENTS (1<<1)
+
+/*-----------------------------------------------------------------------------
+ * Data types
+ *----------------------------------------------------------------------------*/
+
+/* A redis object, that is a type able to hold a string / list / set */
+
+/* The actual Redis Object */
+#define OBJ_STRING 0    /* String object. */
+#define OBJ_LIST 1      /* List object. */
+#define OBJ_SET 2       /* Set object. */
+#define OBJ_ZSET 3      /* Sorted set object. */
+#define OBJ_HASH 4      /* Hash object. */
+
+/* The "module" object type is a special one that signals that the object
+ * is one directly managed by a Redis module. In this case the value points
+ * to a moduleValue struct, which contains the object value (which is only
+ * handled by the module itself) and the RedisModuleType struct which lists
+ * function pointers in order to serialize, deserialize, AOF-rewrite and
+ * free the object.
+ *
+ * Inside the RDB file, module types are encoded as OBJ_MODULE followed
+ * by a 64 bit module type ID, which has a 54 bits module-specific signature
+ * in order to dispatch the loading to the right module, plus a 10 bits
+ * encoding version. */
+#define OBJ_MODULE 5    /* Module object. */
+#define OBJ_STREAM 6    /* Stream object. */
+
+/* Extract encver / signature from a module type ID. */
+#define REDISMODULE_TYPE_ENCVER_BITS 10
+#define REDISMODULE_TYPE_ENCVER_MASK ((1<<REDISMODULE_TYPE_ENCVER_BITS)-1)
+#define REDISMODULE_TYPE_ENCVER(id) (id & REDISMODULE_TYPE_ENCVER_MASK)
+#define REDISMODULE_TYPE_SIGN(id) ((id & ~((uint64_t)REDISMODULE_TYPE_ENCVER_MASK)) >>REDISMODULE_TYPE_ENCVER_BITS)
+
+/* Bit flags for moduleTypeAuxSaveFunc */
+#define REDISMODULE_AUX_BEFORE_RDB (1<<0)
+#define REDISMODULE_AUX_AFTER_RDB (1<<1)
+
+struct RedisModule;
+struct RedisModuleIO;
+struct RedisModuleDigest;
+struct RedisModuleCtx;
+struct moduleLoadQueueEntry;
+struct redisObject;
+struct RedisModuleDefragCtx;
+struct RedisModuleInfoCtx;
+struct RedisModuleKeyOptCtx;
+struct RedisModuleCommand;
+
+/* Each module type implementation should export a set of methods in order
+ * to serialize and deserialize the value in the RDB file, rewrite the AOF
+ * log, create the digest for "DEBUG DIGEST", and free the value when a key
+ * is deleted. */
+typedef void *(*moduleTypeLoadFunc)(struct RedisModuleIO *io, int encver);
+typedef void (*moduleTypeSaveFunc)(struct RedisModuleIO *io, void *value);
+typedef int (*moduleTypeAuxLoadFunc)(struct RedisModuleIO *rdb, int encver, int when);
+typedef void (*moduleTypeAuxSaveFunc)(struct RedisModuleIO *rdb, int when);
+typedef void (*moduleTypeRewriteFunc)(struct RedisModuleIO *io, struct redisObject *key, void *value);
+typedef void (*moduleTypeDigestFunc)(struct RedisModuleDigest *digest, void *value);
+typedef size_t (*moduleTypeMemUsageFunc)(const void *value);
+typedef void (*moduleTypeFreeFunc)(void *value);
+typedef size_t (*moduleTypeFreeEffortFunc)(struct redisObject *key, const void *value);
+typedef void (*moduleTypeUnlinkFunc)(struct redisObject *key, void *value);
+typedef void *(*moduleTypeCopyFunc)(struct redisObject *fromkey, struct redisObject *tokey, const void *value);
+typedef int (*moduleTypeDefragFunc)(struct RedisModuleDefragCtx *ctx, struct redisObject *key, void **value);
+typedef void (*RedisModuleInfoFunc)(struct RedisModuleInfoCtx *ctx, int for_crash_report);
+typedef void (*RedisModuleDefragFunc)(struct RedisModuleDefragCtx *ctx);
+typedef size_t (*moduleTypeMemUsageFunc2)(struct RedisModuleKeyOptCtx *ctx, const void *value, size_t sample_size);
+typedef void (*moduleTypeFreeFunc2)(struct RedisModuleKeyOptCtx *ctx, void *value);
+typedef size_t (*moduleTypeFreeEffortFunc2)(struct RedisModuleKeyOptCtx *ctx, const void *value);
+typedef void (*moduleTypeUnlinkFunc2)(struct RedisModuleKeyOptCtx *ctx, void *value);
+typedef void *(*moduleTypeCopyFunc2)(struct RedisModuleKeyOptCtx *ctx, const void *value);
+
+/* This callback type is called by moduleNotifyUserChanged() every time
+ * a user authenticated via the module API is associated with a different
+ * user or gets disconnected. This needs to be exposed since you can't cast
+ * a function pointer to (void *). */
+typedef void (*RedisModuleUserChangedFunc) (uint64_t client_id, void *privdata);
+
+
+/* The module type, which is referenced in each value of a given type, defines
+ * the methods and links to the module exporting the type. */
+typedef struct RedisModuleType {
+    uint64_t id; /* Higher 54 bits of type ID + 10 lower bits of encoding ver. */
+    struct RedisModule *module;
+    moduleTypeLoadFunc rdb_load;
+    moduleTypeSaveFunc rdb_save;
+    moduleTypeRewriteFunc aof_rewrite;
+    moduleTypeMemUsageFunc mem_usage;
+    moduleTypeDigestFunc digest;
+    moduleTypeFreeFunc free;
+    moduleTypeFreeEffortFunc free_effort;
+    moduleTypeUnlinkFunc unlink;
+    moduleTypeCopyFunc copy;
+    moduleTypeDefragFunc defrag;
+    moduleTypeAuxLoadFunc aux_load;
+    moduleTypeAuxSaveFunc aux_save;
+    moduleTypeMemUsageFunc2 mem_usage2;
+    moduleTypeFreeEffortFunc2 free_effort2;
+    moduleTypeUnlinkFunc2 unlink2;
+    moduleTypeCopyFunc2 copy2;
+    int aux_save_triggers;
+    char name[10]; /* 9 bytes name + null term. Charset: A-Z a-z 0-9 _- */
+} moduleType;
+
+/* In Redis objects 'robj' structures of type OBJ_MODULE, the value pointer
+ * is set to the following structure, referencing the moduleType structure
+ * in order to work with the value, and at the same time providing a raw
+ * pointer to the value, as created by the module commands operating with
+ * the module type.
+ *
+ * So for example in order to free such a value, it is possible to use
+ * the following code:
+ *
+ *  if (robj->type == OBJ_MODULE) {
+ *      moduleValue *mt = robj->ptr;
+ *      mt->type->free(mt->value);
+ *      zfree(mt); // We need to release this in-the-middle struct as well.
+ *  }
+ */
+typedef struct moduleValue {
+    moduleType *type;
+    void *value;
+} moduleValue;
+
+/* This structure represents a module inside the system. */
+struct RedisModule {
+    void *handle;   /* Module dlopen() handle. */
+    char *name;     /* Module name. */
+    int ver;        /* Module version. We use just progressive integers. */
+    int apiver;     /* Module API version as requested during initialization.*/
+    list *types;    /* Module data types. */
+    list *usedby;   /* List of modules using APIs from this one. */
+    list *using;    /* List of modules we use some APIs of. */
+    list *filters;  /* List of filters the module has registered. */
+    list *module_configs; /* List of configurations the module has registered */
+    int configs_initialized; /* Have the module configurations been initialized? */
+    int in_call;    /* RM_Call() nesting level */
+    int in_hook;    /* Hooks callback nesting level for this module (0 or 1). */
+    int options;    /* Module options and capabilities. */
+    int blocked_clients;         /* Count of RedisModuleBlockedClient in this module. */
+    RedisModuleInfoFunc info_cb; /* Callback for module to add INFO fields. */
+    RedisModuleDefragFunc defrag_cb;    /* Callback for global data defrag. */
+    struct moduleLoadQueueEntry *loadmod; /* Module load arguments for config rewrite. */
+};
+typedef struct RedisModule RedisModule;
+
+/* This is a wrapper for the 'rio' streams used inside rdb.c in Redis, so that
+ * the user does not have to take the total count of the written bytes nor
+ * to care about error conditions. */
+typedef struct RedisModuleIO {
+    size_t bytes;       /* Bytes read / written so far. */
+    rio *rio;           /* Rio stream. */
+    moduleType *type;   /* Module type doing the operation. */
+    int error;          /* True if error condition happened. */
+    int ver;            /* Module serialization version: 1 (old),
+                         * 2 (current version with opcodes annotation). */
+    struct RedisModuleCtx *ctx; /* Optional context, see RM_GetContextFromIO()*/
+    struct redisObject *key;    /* Optional name of key processed */
+    int dbid;            /* The dbid of the key being processed, -1 when unknown. */
+} RedisModuleIO;       
+
+/* Macro to initialize an IO context. Note that the 'ver' field is populated
+ * inside rdb.c according to the version of the value to load. */
+#define moduleInitIOContext(iovar,mtype,rioptr,keyptr,db) do { \
+    iovar.rio = rioptr; \
+    iovar.type = mtype; \
+    iovar.bytes = 0; \
+    iovar.error = 0; \
+    iovar.ver = 0; \
+    iovar.key = keyptr; \
+    iovar.dbid = db; \
+    iovar.ctx = NULL; \
+} while(0)
+
+/* This is a structure used to export DEBUG DIGEST capabilities to Redis
+ * modules. We want to capture both the ordered and unordered elements of
+ * a data structure, so that a digest can be created in a way that correctly
+ * reflects the values. See the DEBUG DIGEST command implementation for more
+ * background. */
+typedef struct RedisModuleDigest {
+    unsigned char o[20];    /* Ordered elements. */
+    unsigned char x[20];    /* Xored elements. */
+    struct redisObject *key; /* Optional name of key processed */
+    int dbid;                /* The dbid of the key being processed */
+} RedisModuleDigest;
+
+/* Just start with a digest composed of all zero bytes. */
+#define moduleInitDigestContext(mdvar) do { \
+    memset(mdvar.o,0,sizeof(mdvar.o)); \
+    memset(mdvar.x,0,sizeof(mdvar.x)); \
+} while(0)
+
+/* Objects encoding. Some kind of objects like Strings and Hashes can be
+ * internally represented in multiple ways. The 'encoding' field of the object
+ * is set to one of this fields for this object. */
+#define OBJ_ENCODING_RAW 0     /* Raw representation */
+#define OBJ_ENCODING_INT 1     /* Encoded as integer */
+#define OBJ_ENCODING_HT 2      /* Encoded as hash table */
+#define OBJ_ENCODING_ZIPMAP 3  /* No longer used: old hash encoding. */
+#define OBJ_ENCODING_LINKEDLIST 4 /* No longer used: old list encoding. */
+#define OBJ_ENCODING_ZIPLIST 5 /* No longer used: old list/hash/zset encoding. */
+#define OBJ_ENCODING_INTSET 6  /* Encoded as intset */
+#define OBJ_ENCODING_SKIPLIST 7  /* Encoded as skiplist */
+#define OBJ_ENCODING_EMBSTR 8  /* Embedded sds string encoding */
+#define OBJ_ENCODING_QUICKLIST 9 /* Encoded as linked list of listpacks */
+#define OBJ_ENCODING_STREAM 10 /* Encoded as a radix tree of listpacks */
+#define OBJ_ENCODING_LISTPACK 11 /* Encoded as a listpack */
+
+#define LRU_BITS 24
+#define LRU_CLOCK_MAX ((1<<LRU_BITS)-1) /* Max value of obj->lru */
+#define LRU_CLOCK_RESOLUTION 1000 /* LRU clock resolution in ms */
+
+#define OBJ_SHARED_REFCOUNT INT_MAX     /* Global object never destroyed. */
+#define OBJ_STATIC_REFCOUNT (INT_MAX-1) /* Object allocated in the stack. */
+#define OBJ_FIRST_SPECIAL_REFCOUNT OBJ_STATIC_REFCOUNT
+typedef struct redisObject {
+    unsigned type:4;
+    unsigned encoding:4;
+    unsigned lru:LRU_BITS; /* LRU time (relative to global lru_clock) or
+                            * LFU data (least significant 8 bits frequency
+                            * and most significant 16 bits access time). */
+    int refcount;
+    void *ptr;
+} robj;
+
+/* The a string name for an object's type as listed above
+ * Native types are checked against the OBJ_STRING, OBJ_LIST, OBJ_* defines,
+ * and Module types have their registered name returned. */
+char *getObjectTypeName(robj*);
+
+/* Macro used to initialize a Redis object allocated on the stack.
+ * Note that this macro is taken near the structure definition to make sure
+ * we'll update it when the structure is changed, to avoid bugs like
+ * bug #85 introduced exactly in this way. */
+#define initStaticStringObject(_var,_ptr) do { \
+    _var.refcount = OBJ_STATIC_REFCOUNT; \
+    _var.type = OBJ_STRING; \
+    _var.encoding = OBJ_ENCODING_RAW; \
+    _var.ptr = _ptr; \
+} while(0)
+
+struct evictionPoolEntry; /* Defined in evict.c */
+
+/* This structure is used in order to represent the output buffer of a client,
+ * which is actually a linked list of blocks like that, that is: client->reply. */
+typedef struct clientReplyBlock {
+    size_t size, used;
+    char buf[];
+} clientReplyBlock;
+
+/* Replication buffer blocks is the list of replBufBlock.
+ *
+ * +--------------+       +--------------+       +--------------+
+ * | refcount = 1 |  ...  | refcount = 0 |  ...  | refcount = 2 |
+ * +--------------+       +--------------+       +--------------+
+ *      |                                            /       \
+ *      |                                           /         \
+ *      |                                          /           \
+ *  Repl Backlog                               Replica_A    Replica_B
+ * 
+ * Each replica or replication backlog increments only the refcount of the
+ * 'ref_repl_buf_node' which it points to. So when replica walks to the next
+ * node, it should first increase the next node's refcount, and when we trim
+ * the replication buffer nodes, we remove node always from the head node which
+ * refcount is 0. If the refcount of the head node is not 0, we must stop
+ * trimming and never iterate the next node. */
+
+/* Similar with 'clientReplyBlock', it is used for shared buffers between
+ * all replica clients and replication backlog. */
+typedef struct replBufBlock {
+    int refcount;           /* Number of replicas or repl backlog using. */
+    long long id;           /* The unique incremental number. */
+    long long repl_offset;  /* Start replication offset of the block. */
+    size_t size, used;
+    char buf[];
+} replBufBlock;
+
+/* Opaque type for the Slot to Key API. */
+typedef struct clusterSlotToKeyMapping clusterSlotToKeyMapping;
+
+/* Redis database representation. There are multiple databases identified
+ * by integers from 0 (the default database) up to the max configured
+ * database. The database number is the 'id' field in the structure. */
+typedef struct redisDb {
+    dict *dict;                 /* The keyspace for this DB */
+    dict *expires;              /* Timeout of keys with a timeout set */
+    dict *blocking_keys;        /* Keys with clients waiting for data (BLPOP)*/
+    dict *ready_keys;           /* Blocked keys that received a PUSH */
+    dict *watched_keys;         /* WATCHED keys for MULTI/EXEC CAS */
+    int id;                     /* Database ID */
+    long long avg_ttl;          /* Average TTL, just for stats */
+    unsigned long expires_cursor; /* Cursor of the active expire cycle. */
+    list *defrag_later;         /* List of key names to attempt to defrag one by one, gradually. */
+    clusterSlotToKeyMapping *slots_to_keys; /* Array of slots to keys. Only used in cluster mode (db 0). */
+} redisDb;
+
+/* forward declaration for functions ctx */
+typedef struct functionsLibCtx functionsLibCtx;
+
+/* Holding object that need to be populated during
+ * rdb loading. On loading end it is possible to decide
+ * whether not to set those objects on their rightful place.
+ * For example: dbarray need to be set as main database on
+ *              successful loading and dropped on failure. */
+typedef struct rdbLoadingCtx {
+    redisDb* dbarray;
+    functionsLibCtx* functions_lib_ctx;
+}rdbLoadingCtx;
+
+/* Client MULTI/EXEC state */
+typedef struct multiCmd {
+    robj **argv;
+    int argv_len;
+    int argc;
+    struct redisCommand *cmd;
+} multiCmd;
+
+typedef struct multiState {
+    multiCmd *commands;     /* Array of MULTI commands */
+    int count;              /* Total number of MULTI commands */
+    int cmd_flags;          /* The accumulated command flags OR-ed together.
+                               So if at least a command has a given flag, it
+                               will be set in this field. */
+    int cmd_inv_flags;      /* Same as cmd_flags, OR-ing the ~flags. so that it
+                               is possible to know if all the commands have a
+                               certain flag. */
+    size_t argv_len_sums;    /* mem used by all commands arguments */
+    int alloc_count;         /* total number of multiCmd struct memory reserved. */
+} multiState;
+
+/* This structure holds the blocking operation state for a client.
+ * The fields used depend on client->btype. */
+typedef struct blockingState {
+    /* Generic fields. */
+    long count;             /* Elements to pop if count was specified (BLMPOP/BZMPOP), -1 otherwise. */
+    mstime_t timeout;       /* Blocking operation timeout. If UNIX current time
+                             * is > timeout then the operation timed out. */
+
+    /* BLOCKED_LIST, BLOCKED_ZSET and BLOCKED_STREAM */
+    dict *keys;             /* The keys we are waiting to terminate a blocking
+                             * operation such as BLPOP or XREAD. Or NULL. */
+    robj *target;           /* The key that should receive the element,
+                             * for BLMOVE. */
+    struct blockPos {
+        int wherefrom;      /* Where to pop from */
+        int whereto;        /* Where to push to */
+    } blockpos;              /* The positions in the src/dst lists/zsets
+                             * where we want to pop/push an element
+                             * for BLPOP, BRPOP, BLMOVE and BZMPOP. */
+
+    /* BLOCK_STREAM */
+    size_t xread_count;     /* XREAD COUNT option. */
+    robj *xread_group;      /* XREADGROUP group name. */
+    robj *xread_consumer;   /* XREADGROUP consumer name. */
+    int xread_group_noack;
+
+    /* BLOCKED_WAIT */
+    int numreplicas;        /* Number of replicas we are waiting for ACK. */
+    long long reploffset;   /* Replication offset to reach. */
+
+    /* BLOCKED_MODULE */
+    void *module_blocked_handle; /* RedisModuleBlockedClient structure.
+                                    which is opaque for the Redis core, only
+                                    handled in module.c. */
+} blockingState;
+
+/* The following structure represents a node in the server.ready_keys list,
+ * where we accumulate all the keys that had clients blocked with a blocking
+ * operation such as B[LR]POP, but received new data in the context of the
+ * last executed command.
+ *
+ * After the execution of every command or script, we run this list to check
+ * if as a result we should serve data to clients blocked, unblocking them.
+ * Note that server.ready_keys will not have duplicates as there dictionary
+ * also called ready_keys in every structure representing a Redis database,
+ * where we make sure to remember if a given key was already added in the
+ * server.ready_keys list. */
+typedef struct readyList {
+    redisDb *db;
+    robj *key;
+} readyList;
+
+/* This structure represents a Redis user. This is useful for ACLs, the
+ * user is associated to the connection after the connection is authenticated.
+ * If there is no associated user, the connection uses the default user. */
+#define USER_COMMAND_BITS_COUNT 1024    /* The total number of command bits
+                                           in the user structure. The last valid
+                                           command ID we can set in the user
+                                           is USER_COMMAND_BITS_COUNT-1. */
+#define USER_FLAG_ENABLED (1<<0)        /* The user is active. */
+#define USER_FLAG_DISABLED (1<<1)       /* The user is disabled. */
+#define USER_FLAG_NOPASS (1<<2)         /* The user requires no password, any
+                                           provided password will work. For the
+                                           default user, this also means that
+                                           no AUTH is needed, and every
+                                           connection is immediately
+                                           authenticated. */
+#define USER_FLAG_SANITIZE_PAYLOAD (1<<3)       /* The user require a deep RESTORE
+                                                 * payload sanitization. */
+#define USER_FLAG_SANITIZE_PAYLOAD_SKIP (1<<4)  /* The user should skip the
+                                                 * deep sanitization of RESTORE
+                                                 * payload. */
+
+#define SELECTOR_FLAG_ROOT (1<<0)           /* This is the root user permission
+                                             * selector. */
+#define SELECTOR_FLAG_ALLKEYS (1<<1)        /* The user can mention any key. */
+#define SELECTOR_FLAG_ALLCOMMANDS (1<<2)    /* The user can run all commands. */
+#define SELECTOR_FLAG_ALLCHANNELS (1<<3)    /* The user can mention any Pub/Sub
+                                               channel. */
+
+typedef struct {
+    sds name;       /* The username as an SDS string. */
+    uint32_t flags; /* See USER_FLAG_* */
+    list *passwords; /* A list of SDS valid passwords for this user. */
+    list *selectors; /* A list of selectors this user validates commands
+                        against. This list will always contain at least
+                        one selector for backwards compatibility. */
+    robj *acl_string; /* cached string represent of ACLs */
+} user;
+
+/* With multiplexing we need to take per-client state.
+ * Clients are taken in a linked list. */
+
+#define CLIENT_ID_AOF (UINT64_MAX) /* Reserved ID for the AOF client. If you
+                                      need more reserved IDs use UINT64_MAX-1,
+                                      -2, ... and so forth. */
+
+/* Replication backlog is not separate memory, it just is one consumer of
+ * the global replication buffer. This structure records the reference of
+ * replication buffers. Since the replication buffer block list may be very long,
+ * it would cost much time to search replication offset on partial resync, so
+ * we use one rax tree to index some blocks every REPL_BACKLOG_INDEX_PER_BLOCKS
+ * to make searching offset from replication buffer blocks list faster. */
+typedef struct replBacklog {
+    listNode *ref_repl_buf_node; /* Referenced node of replication buffer blocks,
+                                  * see the definition of replBufBlock. */
+    size_t unindexed_count;      /* The count from last creating index block. */
+    rax *blocks_index;           /* The index of recorded blocks of replication
+                                  * buffer for quickly searching replication
+                                  * offset on partial resynchronization. */
+    long long histlen;           /* Backlog actual data length */
+    long long offset;            /* Replication "master offset" of first
+                                  * byte in the replication backlog buffer.*/
+} replBacklog;
+
+typedef struct {
+    list *clients;
+    size_t mem_usage_sum;
+} clientMemUsageBucket;
+
+typedef struct client {
+    uint64_t id;            /* Client incremental unique ID. */
+    uint64_t flags;         /* Client flags: CLIENT_* macros. */
+    connection *conn;
+    int resp;               /* RESP protocol version. Can be 2 or 3. */
+    redisDb *db;            /* Pointer to currently SELECTed DB. */
+    robj *name;             /* As set by CLIENT SETNAME. */
+    sds querybuf;           /* Buffer we use to accumulate client queries. */
+    size_t qb_pos;          /* The position we have read in querybuf. */
+    size_t querybuf_peak;   /* Recent (100ms or more) peak of querybuf size. */
+    int argc;               /* Num of arguments of current command. */
+    robj **argv;            /* Arguments of current command. */
+    int argv_len;           /* Size of argv array (may be more than argc) */
+    int original_argc;      /* Num of arguments of original command if arguments were rewritten. */
+    robj **original_argv;   /* Arguments of original command if arguments were rewritten. */
+    size_t argv_len_sum;    /* Sum of lengths of objects in argv list. */
+    struct redisCommand *cmd, *lastcmd;  /* Last command executed. */
+    struct redisCommand *realcmd; /* The original command that was executed by the client,
+                                     Used to update error stats in case the c->cmd was modified
+                                     during the command invocation (like on GEOADD for example). */
+    user *user;             /* User associated with this connection. If the
+                               user is set to NULL the connection can do
+                               anything (admin). */
+    int reqtype;            /* Request protocol type: PROTO_REQ_* */
+    int multibulklen;       /* Number of multi bulk arguments left to read. */
+    long bulklen;           /* Length of bulk argument in multi bulk request. */
+    list *reply;            /* List of reply objects to send to the client. */
+    unsigned long long reply_bytes; /* Tot bytes of objects in reply list. */
+    list *deferred_reply_errors;    /* Used for module thread safe contexts. */
+    size_t sentlen;         /* Amount of bytes already sent in the current
+                               buffer or object being sent. */
+    time_t ctime;           /* Client creation time. */
+    long duration;          /* Current command duration. Used for measuring latency of blocking/non-blocking cmds */
+    int slot;               /* The slot the client is executing against. Set to -1 if no slot is being used */
+    dictEntry *cur_script;  /* Cached pointer to the dictEntry of the script being executed. */
+    time_t lastinteraction; /* Time of the last interaction, used for timeout */
+    time_t obuf_soft_limit_reached_time;
+    int authenticated;      /* Needed when the default user requires auth. */
+    int replstate;          /* Replication state if this is a slave. */
+    int repl_start_cmd_stream_on_ack; /* Install slave write handler on first ACK. */
+    int repldbfd;           /* Replication DB file descriptor. */
+    off_t repldboff;        /* Replication DB file offset. */
+    off_t repldbsize;       /* Replication DB file size. */
+    sds replpreamble;       /* Replication DB preamble. */
+    long long read_reploff; /* Read replication offset if this is a master. */
+    long long reploff;      /* Applied replication offset if this is a master. */
+    long long repl_applied; /* Applied replication data count in querybuf, if this is a replica. */
+    long long repl_ack_off; /* Replication ack offset, if this is a slave. */
+    long long repl_ack_time;/* Replication ack time, if this is a slave. */
+    long long repl_last_partial_write; /* The last time the server did a partial write from the RDB child pipe to this replica  */
+    long long psync_initial_offset; /* FULLRESYNC reply offset other slaves
+                                       copying this slave output buffer
+                                       should use. */
+    char replid[CONFIG_RUN_ID_SIZE+1]; /* Master replication ID (if master). */
+    int slave_listening_port; /* As configured with: REPLCONF listening-port */
+    char *slave_addr;       /* Optionally given by REPLCONF ip-address */
+    int slave_capa;         /* Slave capabilities: SLAVE_CAPA_* bitwise OR. */
+    int slave_req;          /* Slave requirements: SLAVE_REQ_* */
+    multiState mstate;      /* MULTI/EXEC state */
+    int btype;              /* Type of blocking op if CLIENT_BLOCKED. */
+    blockingState bpop;     /* blocking state */
+    long long woff;         /* Last write global replication offset. */
+    list *watched_keys;     /* Keys WATCHED for MULTI/EXEC CAS */
+    dict *pubsub_channels;  /* channels a client is interested in (SUBSCRIBE) */
+    list *pubsub_patterns;  /* patterns a client is interested in (SUBSCRIBE) */
+    dict *pubsubshard_channels;  /* shard level channels a client is interested in (SSUBSCRIBE) */
+    sds peerid;             /* Cached peer ID. */
+    sds sockname;           /* Cached connection target address. */
+    listNode *client_list_node; /* list node in client list */
+    listNode *postponed_list_node; /* list node within the postponed list */
+    listNode *pending_read_list_node; /* list node in clients pending read list */
+    RedisModuleUserChangedFunc auth_callback; /* Module callback to execute
+                                               * when the authenticated user
+                                               * changes. */
+    void *auth_callback_privdata; /* Private data that is passed when the auth
+                                   * changed callback is executed. Opaque for
+                                   * Redis Core. */
+    void *auth_module;      /* The module that owns the callback, which is used
+                             * to disconnect the client if the module is
+                             * unloaded for cleanup. Opaque for Redis Core.*/
+
+    /* If this client is in tracking mode and this field is non zero,
+     * invalidation messages for keys fetched by this client will be send to
+     * the specified client ID. */
+    uint64_t client_tracking_redirection;
+    rax *client_tracking_prefixes; /* A dictionary of prefixes we are already
+                                      subscribed to in BCAST mode, in the
+                                      context of client side caching. */
+    /* In updateClientMemoryUsage() we track the memory usage of
+     * each client and add it to the sum of all the clients of a given type,
+     * however we need to remember what was the old contribution of each
+     * client, and in which category the client was, in order to remove it
+     * before adding it the new value. */
+    size_t last_memory_usage;
+    int last_memory_type;
+
+    listNode *mem_usage_bucket_node;
+    clientMemUsageBucket *mem_usage_bucket;
+
+    listNode *ref_repl_buf_node; /* Referenced node of replication buffer blocks,
+                                  * see the definition of replBufBlock. */
+    size_t ref_block_pos;        /* Access position of referenced buffer block,
+                                  * i.e. the next offset to send. */
+
+    /* Response buffer */
+    size_t buf_peak; /* Peak used size of buffer in last 5 sec interval. */
+    mstime_t buf_peak_last_reset_time; /* keeps the last time the buffer peak value was reset */
+    int bufpos;
+    size_t buf_usable_size; /* Usable size of buffer. */
+    char *buf;
+} client;
+
+struct saveparam {
+    time_t seconds;
+    int changes;
+};
+
+struct moduleLoadQueueEntry {
+    sds path;
+    int argc;
+    robj **argv;
+};
+
+struct sentinelLoadQueueEntry {
+    int argc;
+    sds *argv;
+    int linenum;
+    sds line;
+};
+
+struct sentinelConfig {
+    list *pre_monitor_cfg;
+    list *monitor_cfg;
+    list *post_monitor_cfg;
+};
+
+struct sharedObjectsStruct {
+    robj *crlf, *ok, *err, *emptybulk, *czero, *cone, *pong, *space,
+    *queued, *null[4], *nullarray[4], *emptymap[4], *emptyset[4],
+    *emptyarray, *wrongtypeerr, *nokeyerr, *syntaxerr, *sameobjecterr,
+    *outofrangeerr, *noscripterr, *loadingerr,
+    *slowevalerr, *slowscripterr, *slowmoduleerr, *bgsaveerr,
+    *masterdownerr, *roslaveerr, *execaborterr, *noautherr, *noreplicaserr,
+    *busykeyerr, *oomerr, *plus, *messagebulk, *pmessagebulk, *subscribebulk,
+    *unsubscribebulk, *psubscribebulk, *punsubscribebulk, *del, *unlink,
+    *rpop, *lpop, *lpush, *rpoplpush, *lmove, *blmove, *zpopmin, *zpopmax,
+    *emptyscan, *multi, *exec, *left, *right, *hset, *srem, *xgroup, *xclaim,  
+    *script, *replconf, *eval, *persist, *set, *pexpireat, *pexpire, 
+    *time, *pxat, *absttl, *retrycount, *force, *justid, *entriesread,
+    *lastid, *ping, *setid, *keepttl, *load, *createconsumer,
+    *getack, *special_asterick, *special_equals, *default_username, *redacted,
+    *ssubscribebulk,*sunsubscribebulk, *smessagebulk,
+    *select[PROTO_SHARED_SELECT_CMDS],
+    *integers[OBJ_SHARED_INTEGERS],
+    *mbulkhdr[OBJ_SHARED_BULKHDR_LEN], /* "*<value>\r\n" */
+    *bulkhdr[OBJ_SHARED_BULKHDR_LEN],  /* "$<value>\r\n" */
+    *maphdr[OBJ_SHARED_BULKHDR_LEN],   /* "%<value>\r\n" */
+    *sethdr[OBJ_SHARED_BULKHDR_LEN];   /* "~<value>\r\n" */
+    sds minstring, maxstring;
+};
+
+/* ZSETs use a specialized version of Skiplists */
+typedef struct zskiplistNode {
+    sds ele;
+    double score;
+    struct zskiplistNode *backward;
+    struct zskiplistLevel {
+        struct zskiplistNode *forward;
+        unsigned long span;
+    } level[];
+} zskiplistNode;
+
+typedef struct zskiplist {
+    struct zskiplistNode *header, *tail;
+    unsigned long length;
+    int level;
+} zskiplist;
+
+typedef struct zset {
+    dict *dict;
+    zskiplist *zsl;
+} zset;
+
+typedef struct clientBufferLimitsConfig {
+    unsigned long long hard_limit_bytes;
+    unsigned long long soft_limit_bytes;
+    time_t soft_limit_seconds;
+} clientBufferLimitsConfig;
+
+extern clientBufferLimitsConfig clientBufferLimitsDefaults[CLIENT_TYPE_OBUF_COUNT];
+
+/* The redisOp structure defines a Redis Operation, that is an instance of
+ * a command with an argument vector, database ID, propagation target
+ * (PROPAGATE_*), and command pointer.
+ *
+ * Currently only used to additionally propagate more commands to AOF/Replication
+ * after the propagation of the executed command. */
+typedef struct redisOp {
+    robj **argv;
+    int argc, dbid, target;
+} redisOp;
+
+/* Defines an array of Redis operations. There is an API to add to this
+ * structure in an easy way.
+ *
+ * redisOpArrayInit();
+ * redisOpArrayAppend();
+ * redisOpArrayFree();
+ */
+typedef struct redisOpArray {
+    redisOp *ops;
+    int numops;
+    int capacity;
+} redisOpArray;
+
+/* This structure is returned by the getMemoryOverheadData() function in
+ * order to return memory overhead information. */
+struct redisMemOverhead {
+    size_t peak_allocated;
+    size_t total_allocated;
+    size_t startup_allocated;
+    size_t repl_backlog;
+    size_t clients_slaves;
+    size_t clients_normal;
+    size_t cluster_links;
+    size_t aof_buffer;
+    size_t lua_caches;
+    size_t functions_caches;
+    size_t overhead_total;
+    size_t dataset;
+    size_t total_keys;
+    size_t bytes_per_key;
+    float dataset_perc;
+    float peak_perc;
+    float total_frag;
+    ssize_t total_frag_bytes;
+    float allocator_frag;
+    ssize_t allocator_frag_bytes;
+    float allocator_rss;
+    ssize_t allocator_rss_bytes;
+    float rss_extra;
+    size_t rss_extra_bytes;
+    size_t num_dbs;
+    struct {
+        size_t dbid;
+        size_t overhead_ht_main;
+        size_t overhead_ht_expires;
+        size_t overhead_ht_slot_to_keys;
+    } *db;
+};
+
+/* Replication error behavior determines the replica behavior
+ * when it receives an error over the replication stream. In
+ * either case the error is logged. */
+typedef enum {
+    PROPAGATION_ERR_BEHAVIOR_IGNORE = 0,
+    PROPAGATION_ERR_BEHAVIOR_PANIC,
+    PROPAGATION_ERR_BEHAVIOR_PANIC_ON_REPLICAS
+} replicationErrorBehavior;
+
+/* This structure can be optionally passed to RDB save/load functions in
+ * order to implement additional functionalities, by storing and loading
+ * metadata to the RDB file.
+ *
+ * For example, to use select a DB at load time, useful in
+ * replication in order to make sure that chained slaves (slaves of slaves)
+ * select the correct DB and are able to accept the stream coming from the
+ * top-level master. */
+typedef struct rdbSaveInfo {
+    /* Used saving and loading. */
+    int repl_stream_db;  /* DB to select in server.master client. */
+
+    /* Used only loading. */
+    int repl_id_is_set;  /* True if repl_id field is set. */
+    char repl_id[CONFIG_RUN_ID_SIZE+1];     /* Replication ID. */
+    long long repl_offset;                  /* Replication offset. */
+} rdbSaveInfo;
+
+#define RDB_SAVE_INFO_INIT {-1,0,"0000000000000000000000000000000000000000",-1}
+
+struct malloc_stats {
+    size_t zmalloc_used;
+    size_t process_rss;
+    size_t allocator_allocated;
+    size_t allocator_active;
+    size_t allocator_resident;
+};
+
+typedef struct socketFds {
+    int fd[CONFIG_BINDADDR_MAX];
+    int count;
+} socketFds;
+
+/*-----------------------------------------------------------------------------
+ * TLS Context Configuration
+ *----------------------------------------------------------------------------*/
+
+typedef struct redisTLSContextConfig {
+    char *cert_file;                /* Server side and optionally client side cert file name */
+    char *key_file;                 /* Private key filename for cert_file */
+    char *key_file_pass;            /* Optional password for key_file */
+    char *client_cert_file;         /* Certificate to use as a client; if none, use cert_file */
+    char *client_key_file;          /* Private key filename for client_cert_file */
+    char *client_key_file_pass;     /* Optional password for client_key_file */
+    char *dh_params_file;
+    char *ca_cert_file;
+    char *ca_cert_dir;
+    char *protocols;
+    char *ciphers;
+    char *ciphersuites;
+    int prefer_server_ciphers;
+    int session_caching;
+    int session_cache_size;
+    int session_cache_timeout;
+} redisTLSContextConfig;
+
+/*-----------------------------------------------------------------------------
+ * AOF manifest definition
+ *----------------------------------------------------------------------------*/
+typedef enum {
+    AOF_FILE_TYPE_BASE  = 'b', /* BASE file */
+    AOF_FILE_TYPE_HIST  = 'h', /* HISTORY file */
+    AOF_FILE_TYPE_INCR  = 'i', /* INCR file */
+} aof_file_type;
+
+typedef struct {
+    sds           file_name;  /* file name */
+    long long     file_seq;   /* file sequence */
+    aof_file_type file_type;  /* file type */
+} aofInfo;
+
+typedef struct {
+    aofInfo     *base_aof_info;       /* BASE file information. NULL if there is no BASE file. */
+    list        *incr_aof_list;       /* INCR AOFs list. We may have multiple INCR AOF when rewrite fails. */
+    list        *history_aof_list;    /* HISTORY AOF list. When the AOFRW success, The aofInfo contained in
+                                         `base_aof_info` and `incr_aof_list` will be moved to this list. We
+                                         will delete these AOF files when AOFRW finish. */
+    long long   curr_base_file_seq;   /* The sequence number used by the current BASE file. */
+    long long   curr_incr_file_seq;   /* The sequence number used by the current INCR file. */
+    int         dirty;                /* 1 Indicates that the aofManifest in the memory is inconsistent with
+                                         disk, we need to persist it immediately. */
+} aofManifest;
+
+/*-----------------------------------------------------------------------------
+ * Global server state
+ *----------------------------------------------------------------------------*/
+
+/* AIX defines hz to __hz, we don't use this define and in order to allow
+ * Redis build on AIX we need to undef it. */
+#ifdef _AIX
+#undef hz
+#endif
+
+#define CHILD_TYPE_NONE 0
+#define CHILD_TYPE_RDB 1
+#define CHILD_TYPE_AOF 2
+#define CHILD_TYPE_LDB 3
+#define CHILD_TYPE_MODULE 4
+
+typedef enum childInfoType {
+    CHILD_INFO_TYPE_CURRENT_INFO,
+    CHILD_INFO_TYPE_AOF_COW_SIZE,
+    CHILD_INFO_TYPE_RDB_COW_SIZE,
+    CHILD_INFO_TYPE_MODULE_COW_SIZE
+} childInfoType;
+
+struct redisServer {
+    /* General */
+    pid_t pid;                  /* Main process pid. */
+    pthread_t main_thread_id;         /* Main thread id */
+    char *configfile;           /* Absolute config file path, or NULL */
+    char *executable;           /* Absolute executable file path. */
+    char **exec_argv;           /* Executable argv vector (copy). */
+    int dynamic_hz;             /* Change hz value depending on # of clients. */
+    int config_hz;              /* Configured HZ value. May be different than
+                                   the actual 'hz' field value if dynamic-hz
+                                   is enabled. */
+    mode_t umask;               /* The umask value of the process on startup */
+    int hz;                     /* serverCron() calls frequency in hertz */
+    int in_fork_child;          /* indication that this is a fork child */
+    redisDb *db;
+    dict *commands;             /* Command table */
+    dict *orig_commands;        /* Command table before command renaming. */
+    aeEventLoop *el;
+    rax *errors;                /* Errors table */
+    redisAtomic unsigned int lruclock; /* Clock for LRU eviction */
+    volatile sig_atomic_t shutdown_asap; /* Shutdown ordered by signal handler. */
+    mstime_t shutdown_mstime;   /* Timestamp to limit graceful shutdown. */
+    int last_sig_received;      /* Indicates the last SIGNAL received, if any (e.g., SIGINT or SIGTERM). */
+    int shutdown_flags;         /* Flags passed to prepareForShutdown(). */
+    int activerehashing;        /* Incremental rehash in serverCron() */
+    int active_defrag_running;  /* Active defragmentation running (holds current scan aggressiveness) */
+    char *pidfile;              /* PID file path */
+    int arch_bits;              /* 32 or 64 depending on sizeof(long) */
+    int cronloops;              /* Number of times the cron function run */
+    char runid[CONFIG_RUN_ID_SIZE+1];  /* ID always different at every exec. */
+    int sentinel_mode;          /* True if this instance is a Sentinel. */
+    size_t initial_memory_usage; /* Bytes used after initialization. */
+    int always_show_logo;       /* Show logo even for non-stdout logging. */
+    int in_exec;                /* Are we inside EXEC? */
+    int busy_module_yield_flags;         /* Are we inside a busy module? (triggered by RM_Yield). see BUSY_MODULE_YIELD_ flags. */
+    const char *busy_module_yield_reply; /* When non-null, we are inside RM_Yield. */
+    int core_propagates;        /* Is the core (in oppose to the module subsystem) is in charge of calling propagatePendingCommands? */
+    int propagate_no_multi;     /* True if propagatePendingCommands should avoid wrapping command in MULTI/EXEC */
+    int module_ctx_nesting;     /* moduleCreateContext() nesting level */
+    char *ignore_warnings;      /* Config: warnings that should be ignored. */
+    int client_pause_in_transaction; /* Was a client pause executed during this Exec? */
+    int thp_enabled;                 /* If true, THP is enabled. */
+    size_t page_size;                /* The page size of OS. */
+    /* Modules */
+    dict *moduleapi;            /* Exported core APIs dictionary for modules. */
+    dict *sharedapi;            /* Like moduleapi but containing the APIs that
+                                   modules share with each other. */
+    dict *module_configs_queue; /* Dict that stores module configurations from .conf file until after modules are loaded during startup or arguments to loadex. */
+    list *loadmodule_queue;     /* List of modules to load at startup. */
+    int module_pipe[2];         /* Pipe used to awake the event loop by module threads. */
+    pid_t child_pid;            /* PID of current child */
+    int child_type;             /* Type of current child */
+    /* Networking */
+    int port;                   /* TCP listening port */
+    int tls_port;               /* TLS listening port */
+    int tcp_backlog;            /* TCP listen() backlog */
+    char *bindaddr[CONFIG_BINDADDR_MAX]; /* Addresses we should bind to */
+    int bindaddr_count;         /* Number of addresses in server.bindaddr[] */
+    char *bind_source_addr;     /* Source address to bind on for outgoing connections */
+    char *unixsocket;           /* UNIX socket path */
+    unsigned int unixsocketperm; /* UNIX socket permission (see mode_t) */
+    socketFds ipfd;             /* TCP socket file descriptors */
+    socketFds tlsfd;            /* TLS socket file descriptors */
+    int sofd;                   /* Unix socket file descriptor */
+    uint32_t socket_mark_id;    /* ID for listen socket marking */
+    socketFds cfd;              /* Cluster bus listening socket */
+    list *clients;              /* List of active clients */
+    list *clients_to_close;     /* Clients to close asynchronously */
+    list *clients_pending_write; /* There is to write or install handler. */
+    list *clients_pending_read;  /* Client has pending read socket buffers. */
+    list *slaves, *monitors;    /* List of slaves and MONITORs */
+    client *current_client;     /* Current client executing the command. */
+
+    /* Stuff for client mem eviction */
+    clientMemUsageBucket* client_mem_usage_buckets;
+
+    rax *clients_timeout_table; /* Radix tree for blocked clients timeouts. */
+    long fixed_time_expire;     /* If > 0, expire keys against server.mstime. */
+    int in_nested_call;         /* If > 0, in a nested call of a call */
+    rax *clients_index;         /* Active clients dictionary by client ID. */
+    pause_type client_pause_type;      /* True if clients are currently paused */
+    list *postponed_clients;       /* List of postponed clients */
+    mstime_t client_pause_end_time;    /* Time when we undo clients_paused */
+    pause_event *client_pause_per_purpose[NUM_PAUSE_PURPOSES];
+    char neterr[ANET_ERR_LEN];   /* Error buffer for anet.c */
+    dict *migrate_cached_sockets;/* MIGRATE cached sockets */
+    redisAtomic uint64_t next_client_id; /* Next client unique ID. Incremental. */
+    int protected_mode;         /* Don't accept external connections. */
+    int io_threads_num;         /* Number of IO threads to use. */
+    int io_threads_do_reads;    /* Read and parse from IO threads? */
+    int io_threads_active;      /* Is IO threads currently active? */
+    long long events_processed_while_blocked; /* processEventsWhileBlocked() */
+    int enable_protected_configs;    /* Enable the modification of protected configs, see PROTECTED_ACTION_ALLOWED_* */
+    int enable_debug_cmd;            /* Enable DEBUG commands, see PROTECTED_ACTION_ALLOWED_* */
+    int enable_module_cmd;           /* Enable MODULE commands, see PROTECTED_ACTION_ALLOWED_* */
+
+    /* RDB / AOF loading information */
+    volatile sig_atomic_t loading; /* We are loading data from disk if true */
+    volatile sig_atomic_t async_loading; /* We are loading data without blocking the db being served */
+    off_t loading_total_bytes;
+    off_t loading_rdb_used_mem;
+    off_t loading_loaded_bytes;
+    time_t loading_start_time;
+    off_t loading_process_events_interval_bytes;
+    /* Fields used only for stats */
+    time_t stat_starttime;          /* Server start time */
+    long long stat_numcommands;     /* Number of processed commands */
+    long long stat_numconnections;  /* Number of connections received */
+    long long stat_expiredkeys;     /* Number of expired keys */
+    double stat_expired_stale_perc; /* Percentage of keys probably expired */
+    long long stat_expired_time_cap_reached_count; /* Early expire cycle stops.*/
+    long long stat_expire_cycle_time_used; /* Cumulative microseconds used. */
+    long long stat_evictedkeys;     /* Number of evicted keys (maxmemory) */
+    long long stat_evictedclients;  /* Number of evicted clients */
+    long long stat_total_eviction_exceeded_time;  /* Total time over the memory limit, unit us */
+    monotime stat_last_eviction_exceeded_time;  /* Timestamp of current eviction start, unit us */
+    long long stat_keyspace_hits;   /* Number of successful lookups of keys */
+    long long stat_keyspace_misses; /* Number of failed lookups of keys */
+    long long stat_active_defrag_hits;      /* number of allocations moved */
+    long long stat_active_defrag_misses;    /* number of allocations scanned but not moved */
+    long long stat_active_defrag_key_hits;  /* number of keys with moved allocations */
+    long long stat_active_defrag_key_misses;/* number of keys scanned and not moved */
+    long long stat_active_defrag_scanned;   /* number of dictEntries scanned */
+    long long stat_total_active_defrag_time; /* Total time memory fragmentation over the limit, unit us */
+    monotime stat_last_active_defrag_time; /* Timestamp of current active defrag start */
+    size_t stat_peak_memory;        /* Max used memory record */
+    long long stat_aof_rewrites;    /* number of aof file rewrites performed */
+    long long stat_aofrw_consecutive_failures; /* The number of consecutive failures of aofrw */
+    long long stat_rdb_saves;       /* number of rdb saves performed */
+    long long stat_fork_time;       /* Time needed to perform latest fork() */
+    double stat_fork_rate;          /* Fork rate in GB/sec. */
+    long long stat_total_forks;     /* Total count of fork. */
+    long long stat_rejected_conn;   /* Clients rejected because of maxclients */
+    long long stat_sync_full;       /* Number of full resyncs with slaves. */
+    long long stat_sync_partial_ok; /* Number of accepted PSYNC requests. */
+    long long stat_sync_partial_err;/* Number of unaccepted PSYNC requests. */
+    list *slowlog;                  /* SLOWLOG list of commands */
+    long long slowlog_entry_id;     /* SLOWLOG current entry ID */
+    long long slowlog_log_slower_than; /* SLOWLOG time limit (to get logged) */
+    unsigned long slowlog_max_len;     /* SLOWLOG max number of items logged */
+    struct malloc_stats cron_malloc_stats; /* sampled in serverCron(). */
+    redisAtomic long long stat_net_input_bytes; /* Bytes read from network. */
+    redisAtomic long long stat_net_output_bytes; /* Bytes written to network. */
+    redisAtomic long long stat_net_repl_input_bytes; /* Bytes read during replication, added to stat_net_input_bytes in 'info'. */
+    redisAtomic long long stat_net_repl_output_bytes; /* Bytes written during replication, added to stat_net_output_bytes in 'info'. */
+    size_t stat_current_cow_peak;   /* Peak size of copy on write bytes. */
+    size_t stat_current_cow_bytes;  /* Copy on write bytes while child is active. */
+    monotime stat_current_cow_updated;  /* Last update time of stat_current_cow_bytes */
+    size_t stat_current_save_keys_processed;  /* Processed keys while child is active. */
+    size_t stat_current_save_keys_total;  /* Number of keys when child started. */
+    size_t stat_rdb_cow_bytes;      /* Copy on write bytes during RDB saving. */
+    size_t stat_aof_cow_bytes;      /* Copy on write bytes during AOF rewrite. */
+    size_t stat_module_cow_bytes;   /* Copy on write bytes during module fork. */
+    double stat_module_progress;   /* Module save progress. */
+    size_t stat_clients_type_memory[CLIENT_TYPE_COUNT];/* Mem usage by type */
+    size_t stat_cluster_links_memory; /* Mem usage by cluster links */
+    long long stat_unexpected_error_replies; /* Number of unexpected (aof-loading, replica to master, etc.) error replies */
+    long long stat_total_error_replies; /* Total number of issued error replies ( command + rejected errors ) */
+    long long stat_dump_payload_sanitizations; /* Number deep dump payloads integrity validations. */
+    long long stat_io_reads_processed; /* Number of read events processed by IO / Main threads */
+    long long stat_io_writes_processed; /* Number of write events processed by IO / Main threads */
+    redisAtomic long long stat_total_reads_processed; /* Total number of read events processed */
+    redisAtomic long long stat_total_writes_processed; /* Total number of write events processed */
+    /* The following two are used to track instantaneous metrics, like
+     * number of operations per second, network traffic. */
+    struct {
+        long long last_sample_time; /* Timestamp of last sample in ms */
+        long long last_sample_count;/* Count in last sample */
+        long long samples[STATS_METRIC_SAMPLES];
+        int idx;
+    } inst_metric[STATS_METRIC_COUNT];
+    long long stat_reply_buffer_shrinks; /* Total number of output buffer shrinks */
+    long long stat_reply_buffer_expands; /* Total number of output buffer expands */
+
+    /* Configuration */
+    int verbosity;                  /* Loglevel in redis.conf */
+    int maxidletime;                /* Client timeout in seconds */
+    int tcpkeepalive;               /* Set SO_KEEPALIVE if non-zero. */
+    int active_expire_enabled;      /* Can be disabled for testing purposes. */
+    int active_expire_effort;       /* From 1 (default) to 10, active effort. */
+    int active_defrag_enabled;
+    int sanitize_dump_payload;      /* Enables deep sanitization for ziplist and listpack in RDB and RESTORE. */
+    int skip_checksum_validation;   /* Disable checksum validation for RDB and RESTORE payload. */
+    int jemalloc_bg_thread;         /* Enable jemalloc background thread */
+    size_t active_defrag_ignore_bytes; /* minimum amount of fragmentation waste to start active defrag */
+    int active_defrag_threshold_lower; /* minimum percentage of fragmentation to start active defrag */
+    int active_defrag_threshold_upper; /* maximum percentage of fragmentation at which we use maximum effort */
+    int active_defrag_cycle_min;       /* minimal effort for defrag in CPU percentage */
+    int active_defrag_cycle_max;       /* maximal effort for defrag in CPU percentage */
+    unsigned long active_defrag_max_scan_fields; /* maximum number of fields of set/hash/zset/list to process from within the main dict scan */
+    size_t client_max_querybuf_len; /* Limit for client query buffer length */
+    int dbnum;                      /* Total number of configured DBs */
+    int supervised;                 /* 1 if supervised, 0 otherwise. */
+    int supervised_mode;            /* See SUPERVISED_* */
+    int daemonize;                  /* True if running as a daemon */
+    int set_proc_title;             /* True if change proc title */
+    char *proc_title_template;      /* Process title template format */
+    clientBufferLimitsConfig client_obuf_limits[CLIENT_TYPE_OBUF_COUNT];
+    int pause_cron;                 /* Don't run cron tasks (debug) */
+    int latency_tracking_enabled;   /* 1 if extended latency tracking is enabled, 0 otherwise. */
+    double *latency_tracking_info_percentiles; /* Extended latency tracking info output percentile list configuration. */
+    int latency_tracking_info_percentiles_len;
+    /* AOF persistence */
+    int aof_enabled;                /* AOF configuration */
+    int aof_state;                  /* AOF_(ON|OFF|WAIT_REWRITE) */
+    int aof_fsync;                  /* Kind of fsync() policy */
+    char *aof_filename;             /* Basename of the AOF file and manifest file */
+    char *aof_dirname;              /* Name of the AOF directory */
+    int aof_no_fsync_on_rewrite;    /* Don't fsync if a rewrite is in prog. */
+    int aof_rewrite_perc;           /* Rewrite AOF if % growth is > M and... */
+    off_t aof_rewrite_min_size;     /* the AOF file is at least N bytes. */
+    off_t aof_rewrite_base_size;    /* AOF size on latest startup or rewrite. */
+    off_t aof_current_size;         /* AOF current size (Including BASE + INCRs). */
+    off_t aof_last_incr_size;       /* The size of the latest incr AOF. */
+    off_t aof_last_incr_fsync_offset; /* AOF offset which is already requested to be synced to disk.
+                                       * Compare with the aof_last_incr_size. */
+    int aof_flush_sleep;            /* Micros to sleep before flush. (used by tests) */
+    int aof_rewrite_scheduled;      /* Rewrite once BGSAVE terminates. */
+    sds aof_buf;      /* AOF buffer, written before entering the event loop */
+    int aof_fd;       /* File descriptor of currently selected AOF file */
+    int aof_selected_db; /* Currently selected DB in AOF */
+    time_t aof_flush_postponed_start; /* UNIX time of postponed AOF flush */
+    time_t aof_last_fsync;            /* UNIX time of last fsync() */
+    time_t aof_rewrite_time_last;   /* Time used by last AOF rewrite run. */
+    time_t aof_rewrite_time_start;  /* Current AOF rewrite start time. */
+    time_t aof_cur_timestamp;       /* Current record timestamp in AOF */
+    int aof_timestamp_enabled;      /* Enable record timestamp in AOF */
+    int aof_lastbgrewrite_status;   /* C_OK or C_ERR */
+    unsigned long aof_delayed_fsync;  /* delayed AOF fsync() counter */
+    int aof_rewrite_incremental_fsync;/* fsync incrementally while aof rewriting? */
+    int rdb_save_incremental_fsync;   /* fsync incrementally while rdb saving? */
+    int aof_last_write_status;      /* C_OK or C_ERR */
+    int aof_last_write_errno;       /* Valid if aof write/fsync status is ERR */
+    int aof_load_truncated;         /* Don't stop on unexpected AOF EOF. */
+    int aof_use_rdb_preamble;       /* Specify base AOF to use RDB encoding on AOF rewrites. */
+    redisAtomic int aof_bio_fsync_status; /* Status of AOF fsync in bio job. */
+    redisAtomic int aof_bio_fsync_errno;  /* Errno of AOF fsync in bio job. */
+    aofManifest *aof_manifest;       /* Used to track AOFs. */
+    int aof_disable_auto_gc;         /* If disable automatically deleting HISTORY type AOFs?
+                                        default no. (for testings). */
+
+    /* RDB persistence */
+    long long dirty;                /* Changes to DB from the last save */
+    long long dirty_before_bgsave;  /* Used to restore dirty on failed BGSAVE */
+    long long rdb_last_load_keys_expired;  /* number of expired keys when loading RDB */
+    long long rdb_last_load_keys_loaded;   /* number of loaded keys when loading RDB */
+    struct saveparam *saveparams;   /* Save points array for RDB */
+    int saveparamslen;              /* Number of saving points */
+    char *rdb_filename;             /* Name of RDB file */
+    int rdb_compression;            /* Use compression in RDB? */
+    int rdb_checksum;               /* Use RDB checksum? */
+    int rdb_del_sync_files;         /* Remove RDB files used only for SYNC if
+                                       the instance does not use persistence. */
+    time_t lastsave;                /* Unix time of last successful save */
+    time_t lastbgsave_try;          /* Unix time of last attempted bgsave */
+    time_t rdb_save_time_last;      /* Time used by last RDB save run. */
+    time_t rdb_save_time_start;     /* Current RDB save start time. */
+    int rdb_bgsave_scheduled;       /* BGSAVE when possible if true. */
+    int rdb_child_type;             /* Type of save by active child. */
+    int lastbgsave_status;          /* C_OK or C_ERR */
+    int stop_writes_on_bgsave_err;  /* Don't allow writes if can't BGSAVE */
+    int rdb_pipe_read;              /* RDB pipe used to transfer the rdb data */
+                                    /* to the parent process in diskless repl. */
+    int rdb_child_exit_pipe;        /* Used by the diskless parent allow child exit. */
+    connection **rdb_pipe_conns;    /* Connections which are currently the */
+    int rdb_pipe_numconns;          /* target of diskless rdb fork child. */
+    int rdb_pipe_numconns_writing;  /* Number of rdb conns with pending writes. */
+    char *rdb_pipe_buff;            /* In diskless replication, this buffer holds data */
+    int rdb_pipe_bufflen;           /* that was read from the rdb pipe. */
+    int rdb_key_save_delay;         /* Delay in microseconds between keys while
+                                     * writing the RDB. (for testings). negative
+                                     * value means fractions of microseconds (on average). */
+    int key_load_delay;             /* Delay in microseconds between keys while
+                                     * loading aof or rdb. (for testings). negative
+                                     * value means fractions of microseconds (on average). */
+    /* Pipe and data structures for child -> parent info sharing. */
+    int child_info_pipe[2];         /* Pipe used to write the child_info_data. */
+    int child_info_nread;           /* Num of bytes of the last read from pipe */
+    /* Propagation of commands in AOF / replication */
+    redisOpArray also_propagate;    /* Additional command to propagate. */
+    int replication_allowed;        /* Are we allowed to replicate? */
+    /* Logging */
+    char *logfile;                  /* Path of log file */
+    int syslog_enabled;             /* Is syslog enabled? */
+    char *syslog_ident;             /* Syslog ident */
+    int syslog_facility;            /* Syslog facility */
+    int crashlog_enabled;           /* Enable signal handler for crashlog.
+                                     * disable for clean core dumps. */
+    int memcheck_enabled;           /* Enable memory check on crash. */
+    int use_exit_on_panic;          /* Use exit() on panic and assert rather than
+                                     * abort(). useful for Valgrind. */
+    /* Shutdown */
+    int shutdown_timeout;           /* Graceful shutdown time limit in seconds. */
+    int shutdown_on_sigint;         /* Shutdown flags configured for SIGINT. */
+    int shutdown_on_sigterm;        /* Shutdown flags configured for SIGTERM. */
+
+    /* Replication (master) */
+    char replid[CONFIG_RUN_ID_SIZE+1];  /* My current replication ID. */
+    char replid2[CONFIG_RUN_ID_SIZE+1]; /* replid inherited from master*/
+    long long master_repl_offset;   /* My current replication offset */
+    long long second_replid_offset; /* Accept offsets up to this for replid2. */
+    int slaveseldb;                 /* Last SELECTed DB in replication output */
+    int repl_ping_slave_period;     /* Master pings the slave every N seconds */
+    replBacklog *repl_backlog;      /* Replication backlog for partial syncs */
+    long long repl_backlog_size;    /* Backlog circular buffer size */
+    time_t repl_backlog_time_limit; /* Time without slaves after the backlog
+                                       gets released. */
+    time_t repl_no_slaves_since;    /* We have no slaves since that time.
+                                       Only valid if server.slaves len is 0. */
+    int repl_min_slaves_to_write;   /* Min number of slaves to write. */
+    int repl_min_slaves_max_lag;    /* Max lag of <count> slaves to write. */
+    int repl_good_slaves_count;     /* Number of slaves with lag <= max_lag. */
+    int repl_diskless_sync;         /* Master send RDB to slaves sockets directly. */
+    int repl_diskless_load;         /* Slave parse RDB directly from the socket.
+                                     * see REPL_DISKLESS_LOAD_* enum */
+    int repl_diskless_sync_delay;   /* Delay to start a diskless repl BGSAVE. */
+    int repl_diskless_sync_max_replicas;/* Max replicas for diskless repl BGSAVE
+                                         * delay (start sooner if they all connect). */
+    size_t repl_buffer_mem;         /* The memory of replication buffer. */
+    list *repl_buffer_blocks;       /* Replication buffers blocks list
+                                     * (serving replica clients and repl backlog) */
+    /* Replication (slave) */
+    char *masteruser;               /* AUTH with this user and masterauth with master */
+    sds masterauth;                 /* AUTH with this password with master */
+    char *masterhost;               /* Hostname of master */
+    int masterport;                 /* Port of master */
+    int repl_timeout;               /* Timeout after N seconds of master idle */
+    client *master;     /* Client that is master for this slave */
+    client *cached_master; /* Cached master to be reused for PSYNC. */
+    int repl_syncio_timeout; /* Timeout for synchronous I/O calls */
+    int repl_state;          /* Replication status if the instance is a slave */
+    off_t repl_transfer_size; /* Size of RDB to read from master during sync. */
+    off_t repl_transfer_read; /* Amount of RDB read from master during sync. */
+    off_t repl_transfer_last_fsync_off; /* Offset when we fsync-ed last time. */
+    connection *repl_transfer_s;     /* Slave -> Master SYNC connection */
+    int repl_transfer_fd;    /* Slave -> Master SYNC temp file descriptor */
+    char *repl_transfer_tmpfile; /* Slave-> master SYNC temp file name */
+    time_t repl_transfer_lastio; /* Unix time of the latest read, for timeout */
+    int repl_serve_stale_data; /* Serve stale data when link is down? */
+    int repl_slave_ro;          /* Slave is read only? */
+    int repl_slave_ignore_maxmemory;    /* If true slaves do not evict. */
+    time_t repl_down_since; /* Unix time at which link with master went down */
+    int repl_disable_tcp_nodelay;   /* Disable TCP_NODELAY after SYNC? */
+    int slave_priority;             /* Reported in INFO and used by Sentinel. */
+    int replica_announced;          /* If true, replica is announced by Sentinel */
+    int slave_announce_port;        /* Give the master this listening port. */
+    char *slave_announce_ip;        /* Give the master this ip address. */
+    int propagation_error_behavior; /* Configures the behavior of the replica
+                                     * when it receives an error on the replication stream */
+    int repl_ignore_disk_write_error;   /* Configures whether replicas panic when unable to
+                                         * persist writes to AOF. */
+    /* The following two fields is where we store master PSYNC replid/offset
+     * while the PSYNC is in progress. At the end we'll copy the fields into
+     * the server->master client structure. */
+    char master_replid[CONFIG_RUN_ID_SIZE+1];  /* Master PSYNC runid. */
+    long long master_initial_offset;           /* Master PSYNC offset. */
+    int repl_slave_lazy_flush;          /* Lazy FLUSHALL before loading DB? */
+    /* Synchronous replication. */
+    list *clients_waiting_acks;         /* Clients waiting in WAIT command. */
+    int get_ack_from_slaves;            /* If true we send REPLCONF GETACK. */
+    /* Limits */
+    unsigned int maxclients;            /* Max number of simultaneous clients */
+    unsigned long long maxmemory;   /* Max number of memory bytes to use */
+    ssize_t maxmemory_clients;       /* Memory limit for total client buffers */
+    int maxmemory_policy;           /* Policy for key eviction */
+    int maxmemory_samples;          /* Precision of random sampling */
+    int maxmemory_eviction_tenacity;/* Aggressiveness of eviction processing */
+    int lfu_log_factor;             /* LFU logarithmic counter factor. */
+    int lfu_decay_time;             /* LFU counter decay factor. */
+    long long proto_max_bulk_len;   /* Protocol bulk length maximum size. */
+    int oom_score_adj_values[CONFIG_OOM_COUNT];   /* Linux oom_score_adj configuration */
+    int oom_score_adj;                            /* If true, oom_score_adj is managed */
+    int disable_thp;                              /* If true, disable THP by syscall */
+    /* Blocked clients */
+    unsigned int blocked_clients;   /* # of clients executing a blocking cmd.*/
+    unsigned int blocked_clients_by_type[BLOCKED_NUM];
+    list *unblocked_clients; /* list of clients to unblock before next loop */
+    list *ready_keys;        /* List of readyList structures for BLPOP & co */
+    /* Client side caching. */
+    unsigned int tracking_clients;  /* # of clients with tracking enabled.*/
+    size_t tracking_table_max_keys; /* Max number of keys in tracking table. */
+    list *tracking_pending_keys; /* tracking invalidation keys pending to flush */
+    /* Sort parameters - qsort_r() is only available under BSD so we
+     * have to take this state global, in order to pass it to sortCompare() */
+    int sort_desc;
+    int sort_alpha;
+    int sort_bypattern;
+    int sort_store;
+    /* Zip structure config, see redis.conf for more information  */
+    size_t hash_max_listpack_entries;
+    size_t hash_max_listpack_value;
+    size_t set_max_intset_entries;
+    size_t zset_max_listpack_entries;
+    size_t zset_max_listpack_value;
+    size_t hll_sparse_max_bytes;
+    size_t stream_node_max_bytes;
+    long long stream_node_max_entries;
+    /* List parameters */
+    int list_max_listpack_size;
+    int list_compress_depth;
+    /* time cache */
+    redisAtomic time_t unixtime; /* Unix time sampled every cron cycle. */
+    time_t timezone;            /* Cached timezone. As set by tzset(). */
+    int daylight_active;        /* Currently in daylight saving time. */
+    mstime_t mstime;            /* 'unixtime' in milliseconds. */
+    ustime_t ustime;            /* 'unixtime' in microseconds. */
+    size_t blocking_op_nesting; /* Nesting level of blocking operation, used to reset blocked_last_cron. */
+    long long blocked_last_cron; /* Indicate the mstime of the last time we did cron jobs from a blocking operation */
+    /* Pubsub */
+    dict *pubsub_channels;  /* Map channels to list of subscribed clients */
+    dict *pubsub_patterns;  /* A dict of pubsub_patterns */
+    int notify_keyspace_events; /* Events to propagate via Pub/Sub. This is an
+                                   xor of NOTIFY_... flags. */
+    dict *pubsubshard_channels;  /* Map shard channels to list of subscribed clients */
+    /* Cluster */
+    int cluster_enabled;      /* Is cluster enabled? */
+    int cluster_port;         /* Set the cluster port for a node. */
+    mstime_t cluster_node_timeout; /* Cluster node timeout. */
+    char *cluster_configfile; /* Cluster auto-generated config file name. */
+    struct clusterState *cluster;  /* State of the cluster */
+    int cluster_migration_barrier; /* Cluster replicas migration barrier. */
+    int cluster_allow_replica_migration; /* Automatic replica migrations to orphaned masters and from empty masters */
+    int cluster_slave_validity_factor; /* Slave max data age for failover. */
+    int cluster_require_full_coverage; /* If true, put the cluster down if
+                                          there is at least an uncovered slot.*/
+    int cluster_slave_no_failover;  /* Prevent slave from starting a failover
+                                       if the master is in failure state. */
+    char *cluster_announce_ip;  /* IP address to announce on cluster bus. */
+    char *cluster_announce_hostname;  /* hostname to announce on cluster bus. */
+    int cluster_preferred_endpoint_type; /* Use the announced hostname when available. */
+    int cluster_announce_port;     /* base port to announce on cluster bus. */
+    int cluster_announce_tls_port; /* TLS port to announce on cluster bus. */
+    int cluster_announce_bus_port; /* bus port to announce on cluster bus. */
+    int cluster_module_flags;      /* Set of flags that Redis modules are able
+                                      to set in order to suppress certain
+                                      native Redis Cluster features. Check the
+                                      REDISMODULE_CLUSTER_FLAG_*. */
+    int cluster_allow_reads_when_down; /* Are reads allowed when the cluster
+                                        is down? */
+    int cluster_config_file_lock_fd;   /* cluster config fd, will be flock */
+    unsigned long long cluster_link_sendbuf_limit_bytes;  /* Memory usage limit on individual link send buffers*/
+    int cluster_drop_packet_filter; /* Debug config that allows tactically
+                                   * dropping packets of a specific type */
+    /* Scripting */
+    client *script_caller;       /* The client running script right now, or NULL */
+    mstime_t busy_reply_threshold;  /* Script / module timeout in milliseconds */
+    int pre_command_oom_state;         /* OOM before command (script?) was started */
+    int script_disable_deny_script;    /* Allow running commands marked "no-script" inside a script. */
+    /* Lazy free */
+    int lazyfree_lazy_eviction;
+    int lazyfree_lazy_expire;
+    int lazyfree_lazy_server_del;
+    int lazyfree_lazy_user_del;
+    int lazyfree_lazy_user_flush;
+    /* Latency monitor */
+    long long latency_monitor_threshold;
+    dict *latency_events;
+    /* ACLs */
+    char *acl_filename;           /* ACL Users file. NULL if not configured. */
+    unsigned long acllog_max_len; /* Maximum length of the ACL LOG list. */
+    sds requirepass;              /* Remember the cleartext password set with
+                                     the old "requirepass" directive for
+                                     backward compatibility with Redis <= 5. */
+    int acl_pubsub_default;      /* Default ACL pub/sub channels flag */
+    /* Assert & bug reporting */
+    int watchdog_period;  /* Software watchdog period in ms. 0 = off */
+    /* System hardware info */
+    size_t system_memory_size;  /* Total memory in system as reported by OS */
+    /* TLS Configuration */
+    int tls_cluster;
+    int tls_replication;
+    int tls_auth_clients;
+    redisTLSContextConfig tls_ctx_config;
+    /* cpu affinity */
+    char *server_cpulist; /* cpu affinity list of redis server main/io thread. */
+    char *bio_cpulist; /* cpu affinity list of bio thread. */
+    char *aof_rewrite_cpulist; /* cpu affinity list of aof rewrite process. */
+    char *bgsave_cpulist; /* cpu affinity list of bgsave process. */
+    /* Sentinel config */
+    struct sentinelConfig *sentinel_config; /* sentinel config to load at startup time. */
+    /* Coordinate failover info */
+    mstime_t failover_end_time; /* Deadline for failover command. */
+    int force_failover; /* If true then failover will be forced at the
+                         * deadline, otherwise failover is aborted. */
+    char *target_replica_host; /* Failover target host. If null during a
+                                * failover then any replica can be used. */
+    int target_replica_port; /* Failover target port */
+    int failover_state; /* Failover state */
+    int cluster_allow_pubsubshard_when_down; /* Is pubsubshard allowed when the cluster
+                                                is down, doesn't affect pubsub global. */
+    long reply_buffer_peak_reset_time; /* The amount of time (in milliseconds) to wait between reply buffer peak resets */
+    int reply_buffer_resizing_enabled; /* Is reply buffer resizing enabled (1 by default) */
+};
+
+#define MAX_KEYS_BUFFER 256
+
+typedef struct {
+    int pos; /* The position of the key within the client array */
+    int flags; /* The flags associated with the key access, see
+                  CMD_KEY_* for more information */
+} keyReference;
+
+/* A result structure for the various getkeys function calls. It lists the
+ * keys as indices to the provided argv. This functionality is also re-used
+ * for returning channel information.
+ */
+typedef struct {
+    keyReference keysbuf[MAX_KEYS_BUFFER];       /* Pre-allocated buffer, to save heap allocations */
+    keyReference *keys;                          /* Key indices array, points to keysbuf or heap */
+    int numkeys;                        /* Number of key indices return */
+    int size;                           /* Available array size */
+} getKeysResult;
+#define GETKEYS_RESULT_INIT { {{0}}, NULL, 0, MAX_KEYS_BUFFER }
+
+/* Key specs definitions.
+ *
+ * Brief: This is a scheme that tries to describe the location
+ * of key arguments better than the old [first,last,step] scheme
+ * which is limited and doesn't fit many commands.
+ *
+ * There are two steps:
+ * 1. begin_search (BS): in which index should we start searching for keys?
+ * 2. find_keys (FK): relative to the output of BS, how can we will which args are keys?
+ *
+ * There are two types of BS:
+ * 1. index: key args start at a constant index
+ * 2. keyword: key args start just after a specific keyword
+ *
+ * There are two kinds of FK:
+ * 1. range: keys end at a specific index (or relative to the last argument)
+ * 2. keynum: there's an arg that contains the number of key args somewhere before the keys themselves
+ */
+
+/* Must be synced with generate-command-code.py */
+typedef enum {
+    KSPEC_BS_INVALID = 0, /* Must be 0 */
+    KSPEC_BS_UNKNOWN,
+    KSPEC_BS_INDEX,
+    KSPEC_BS_KEYWORD
+} kspec_bs_type;
+
+/* Must be synced with generate-command-code.py */
+typedef enum {
+    KSPEC_FK_INVALID = 0, /* Must be 0 */
+    KSPEC_FK_UNKNOWN,
+    KSPEC_FK_RANGE,
+    KSPEC_FK_KEYNUM
+} kspec_fk_type;
+
+typedef struct {
+    /* Declarative data */
+    const char *notes;
+    uint64_t flags;
+    kspec_bs_type begin_search_type;
+    union {
+        struct {
+            /* The index from which we start the search for keys */
+            int pos;
+        } index;
+        struct {
+            /* The keyword that indicates the beginning of key args */
+            const char *keyword;
+            /* An index in argv from which to start searching.
+             * Can be negative, which means start search from the end, in reverse
+             * (Example: -2 means to start in reverse from the penultimate arg) */
+            int startfrom;
+        } keyword;
+    } bs;
+    kspec_fk_type find_keys_type;
+    union {
+        /* NOTE: Indices in this struct are relative to the result of the begin_search step!
+         * These are: range.lastkey, keynum.keynumidx, keynum.firstkey */
+        struct {
+            /* Index of the last key.
+             * Can be negative, in which case it's not relative. -1 indicating till the last argument,
+             * -2 one before the last and so on. */
+            int lastkey;
+            /* How many args should we skip after finding a key, in order to find the next one. */
+            int keystep;
+            /* If lastkey is -1, we use limit to stop the search by a factor. 0 and 1 mean no limit.
+             * 2 means 1/2 of the remaining args, 3 means 1/3, and so on. */
+            int limit;
+        } range;
+        struct {
+            /* Index of the argument containing the number of keys to come */
+            int keynumidx;
+            /* Index of the fist key (Usually it's just after keynumidx, in
+             * which case it should be set to keynumidx+1). */
+            int firstkey;
+            /* How many args should we skip after finding a key, in order to find the next one. */
+            int keystep;
+        } keynum;
+    } fk;
+} keySpec;
+
+/* Number of static key specs */
+#define STATIC_KEY_SPECS_NUM 4
+
+/* Must be synced with ARG_TYPE_STR and generate-command-code.py */
+typedef enum {
+    ARG_TYPE_STRING,
+    ARG_TYPE_INTEGER,
+    ARG_TYPE_DOUBLE,
+    ARG_TYPE_KEY, /* A string, but represents a keyname */
+    ARG_TYPE_PATTERN,
+    ARG_TYPE_UNIX_TIME,
+    ARG_TYPE_PURE_TOKEN,
+    ARG_TYPE_ONEOF, /* Has subargs */
+    ARG_TYPE_BLOCK /* Has subargs */
+} redisCommandArgType;
+
+#define CMD_ARG_NONE            (0)
+#define CMD_ARG_OPTIONAL        (1<<0)
+#define CMD_ARG_MULTIPLE        (1<<1)
+#define CMD_ARG_MULTIPLE_TOKEN  (1<<2)
+
+typedef struct redisCommandArg {
+    const char *name;
+    redisCommandArgType type;
+    int key_spec_index;
+    const char *token;
+    const char *summary;
+    const char *since;
+    int flags;
+    const char *deprecated_since;
+    struct redisCommandArg *subargs;
+    /* runtime populated data */
+    int num_args;
+} redisCommandArg;
+
+/* Must be synced with RESP2_TYPE_STR and generate-command-code.py */
+typedef enum {
+    RESP2_SIMPLE_STRING,
+    RESP2_ERROR,
+    RESP2_INTEGER,
+    RESP2_BULK_STRING,
+    RESP2_NULL_BULK_STRING,
+    RESP2_ARRAY,
+    RESP2_NULL_ARRAY,
+} redisCommandRESP2Type;
+
+/* Must be synced with RESP3_TYPE_STR and generate-command-code.py */
+typedef enum {
+    RESP3_SIMPLE_STRING,
+    RESP3_ERROR,
+    RESP3_INTEGER,
+    RESP3_DOUBLE,
+    RESP3_BULK_STRING,
+    RESP3_ARRAY,
+    RESP3_MAP,
+    RESP3_SET,
+    RESP3_BOOL,
+    RESP3_NULL,
+} redisCommandRESP3Type;
+
+typedef struct {
+    const char *since;
+    const char *changes;
+} commandHistory;
+
+/* Must be synced with COMMAND_GROUP_STR and generate-command-code.py */
+typedef enum {
+    COMMAND_GROUP_GENERIC,
+    COMMAND_GROUP_STRING,
+    COMMAND_GROUP_LIST,
+    COMMAND_GROUP_SET,
+    COMMAND_GROUP_SORTED_SET,
+    COMMAND_GROUP_HASH,
+    COMMAND_GROUP_PUBSUB,
+    COMMAND_GROUP_TRANSACTIONS,
+    COMMAND_GROUP_CONNECTION,
+    COMMAND_GROUP_SERVER,
+    COMMAND_GROUP_SCRIPTING,
+    COMMAND_GROUP_HYPERLOGLOG,
+    COMMAND_GROUP_CLUSTER,
+    COMMAND_GROUP_SENTINEL,
+    COMMAND_GROUP_GEO,
+    COMMAND_GROUP_STREAM,
+    COMMAND_GROUP_BITMAP,
+    COMMAND_GROUP_MODULE,
+} redisCommandGroup;
+
+typedef void redisCommandProc(client *c);
+typedef int redisGetKeysProc(struct redisCommand *cmd, robj **argv, int argc, getKeysResult *result);
+
+/* Redis command structure.
+ *
+ * Note that the command table is in commands.c and it is auto-generated.
+ *
+ * This is the meaning of the flags:
+ *
+ * CMD_WRITE:       Write command (may modify the key space).
+ *
+ * CMD_READONLY:    Commands just reading from keys without changing the content.
+ *                  Note that commands that don't read from the keyspace such as
+ *                  TIME, SELECT, INFO, administrative commands, and connection
+ *                  or transaction related commands (multi, exec, discard, ...)
+ *                  are not flagged as read-only commands, since they affect the
+ *                  server or the connection in other ways.
+ *
+ * CMD_DENYOOM:     May increase memory usage once called. Don't allow if out
+ *                  of memory.
+ *
+ * CMD_ADMIN:       Administrative command, like SAVE or SHUTDOWN.
+ *
+ * CMD_PUBSUB:      Pub/Sub related command.
+ *
+ * CMD_NOSCRIPT:    Command not allowed in scripts.
+ *
+ * CMD_BLOCKING:    The command has the potential to block the client.
+ *
+ * CMD_LOADING:     Allow the command while loading the database.
+ *
+ * CMD_NO_ASYNC_LOADING: Deny during async loading (when a replica uses diskless
+ *                       sync swapdb, and allows access to the old dataset)
+ *
+ * CMD_STALE:       Allow the command while a slave has stale data but is not
+ *                  allowed to serve this data. Normally no command is accepted
+ *                  in this condition but just a few.
+ *
+ * CMD_SKIP_MONITOR:  Do not automatically propagate the command on MONITOR.
+ *
+ * CMD_SKIP_SLOWLOG:  Do not automatically propagate the command to the slowlog.
+ *
+ * CMD_ASKING:      Perform an implicit ASKING for this command, so the
+ *                  command will be accepted in cluster mode if the slot is marked
+ *                  as 'importing'.
+ *
+ * CMD_FAST:        Fast command: O(1) or O(log(N)) command that should never
+ *                  delay its execution as long as the kernel scheduler is giving
+ *                  us time. Note that commands that may trigger a DEL as a side
+ *                  effect (like SET) are not fast commands.
+ *
+ * CMD_NO_AUTH:     Command doesn't require authentication
+ *
+ * CMD_MAY_REPLICATE:   Command may produce replication traffic, but should be
+ *                      allowed under circumstances where write commands are disallowed.
+ *                      Examples include PUBLISH, which replicates pubsub messages,and
+ *                      EVAL, which may execute write commands, which are replicated,
+ *                      or may just execute read commands. A command can not be marked
+ *                      both CMD_WRITE and CMD_MAY_REPLICATE
+ *
+ * CMD_SENTINEL:    This command is present in sentinel mode.
+ *
+ * CMD_ONLY_SENTINEL: This command is present only when in sentinel mode.
+ *                    And should be removed from redis.
+ *
+ * CMD_NO_MANDATORY_KEYS: This key arguments for this command are optional.
+ *
+ * CMD_NO_MULTI: The command is not allowed inside a transaction
+ *
+ * CMD_ALLOW_BUSY: The command can run while another command is running for
+ *                 a long time (timedout script, module command that yields)
+ *
+ * CMD_TOUCHES_ARBITRARY_KEYS: The command may touch (and cause lazy-expire)
+ *                             arbitrary key (i.e not provided in argv)
+ *
+ * The following additional flags are only used in order to put commands
+ * in a specific ACL category. Commands can have multiple ACL categories.
+ * See redis.conf for the exact meaning of each.
+ *
+ * @keyspace, @read, @write, @set, @sortedset, @list, @hash, @string, @bitmap,
+ * @hyperloglog, @stream, @admin, @fast, @slow, @pubsub, @blocking, @dangerous,
+ * @connection, @transaction, @scripting, @geo.
+ *
+ * Note that:
+ *
+ * 1) The read-only flag implies the @read ACL category.
+ * 2) The write flag implies the @write ACL category.
+ * 3) The fast flag implies the @fast ACL category.
+ * 4) The admin flag implies the @admin and @dangerous ACL category.
+ * 5) The pub-sub flag implies the @pubsub ACL category.
+ * 6) The lack of fast flag implies the @slow ACL category.
+ * 7) The non obvious "keyspace" category includes the commands
+ *    that interact with keys without having anything to do with
+ *    specific data structures, such as: DEL, RENAME, MOVE, SELECT,
+ *    TYPE, EXPIRE*, PEXPIRE*, TTL, PTTL, ...
+ */
+struct redisCommand {
+    /* Declarative data */
+    const char *declared_name; /* A string representing the command declared_name.
+                                * It is a const char * for native commands and SDS for module commands. */
+    const char *summary; /* Summary of the command (optional). */
+    const char *complexity; /* Complexity description (optional). */
+    const char *since; /* Debut version of the command (optional). */
+    int doc_flags; /* Flags for documentation (see CMD_DOC_*). */
+    const char *replaced_by; /* In case the command is deprecated, this is the successor command. */
+    const char *deprecated_since; /* In case the command is deprecated, when did it happen? */
+    redisCommandGroup group; /* Command group */
+    commandHistory *history; /* History of the command */
+    const char **tips; /* An array of strings that are meant to be tips for clients/proxies regarding this command */
+    redisCommandProc *proc; /* Command implementation */
+    int arity; /* Number of arguments, it is possible to use -N to say >= N */
+    uint64_t flags; /* Command flags, see CMD_*. */
+    uint64_t acl_categories; /* ACl categories, see ACL_CATEGORY_*. */
+    keySpec key_specs_static[STATIC_KEY_SPECS_NUM]; /* Key specs. See keySpec */
+    /* Use a function to determine keys arguments in a command line.
+     * Used for Redis Cluster redirect (may be NULL) */
+    redisGetKeysProc *getkeys_proc;
+    /* Array of subcommands (may be NULL) */
+    struct redisCommand *subcommands;
+    /* Array of arguments (may be NULL) */
+    struct redisCommandArg *args;
+
+    /* Runtime populated data */
+    long long microseconds, calls, rejected_calls, failed_calls;
+    int id;     /* Command ID. This is a progressive ID starting from 0 that
+                   is assigned at runtime, and is used in order to check
+                   ACLs. A connection is able to execute a given command if
+                   the user associated to the connection has this command
+                   bit set in the bitmap of allowed commands. */
+    sds fullname; /* A SDS string representing the command fullname. */
+    struct hdr_histogram* latency_histogram; /*points to the command latency command histogram (unit of time nanosecond) */
+    keySpec *key_specs;
+    keySpec legacy_range_key_spec; /* The legacy (first,last,step) key spec is
+                                     * still maintained (if applicable) so that
+                                     * we can still support the reply format of
+                                     * COMMAND INFO and COMMAND GETKEYS */
+    int num_args;
+    int num_history;
+    int num_tips;
+    int key_specs_num;
+    int key_specs_max;
+    dict *subcommands_dict; /* A dictionary that holds the subcommands, the key is the subcommand sds name
+                             * (not the fullname), and the value is the redisCommand structure pointer. */
+    struct redisCommand *parent;
+    struct RedisModuleCommand *module_cmd; /* A pointer to the module command data (NULL if native command) */
+};
+
+struct redisError {
+    long long count;
+};
+
+struct redisFunctionSym {
+    char *name;
+    unsigned long pointer;
+};
+
+typedef struct _redisSortObject {
+    robj *obj;
+    union {
+        double score;
+        robj *cmpobj;
+    } u;
+} redisSortObject;
+
+typedef struct _redisSortOperation {
+    int type;
+    robj *pattern;
+} redisSortOperation;
+
+/* Structure to hold list iteration abstraction. */
+typedef struct {
+    robj *subject;
+    unsigned char encoding;
+    unsigned char direction; /* Iteration direction */
+    quicklistIter *iter;
+} listTypeIterator;
+
+/* Structure for an entry while iterating over a list. */
+typedef struct {
+    listTypeIterator *li;
+    quicklistEntry entry; /* Entry in quicklist */
+} listTypeEntry;
+
+/* Structure to hold set iteration abstraction. */
+typedef struct {
+    robj *subject;
+    int encoding;
+    int ii; /* intset iterator */
+    dictIterator *di;
+} setTypeIterator;
+
+/* Structure to hold hash iteration abstraction. Note that iteration over
+ * hashes involves both fields and values. Because it is possible that
+ * not both are required, store pointers in the iterator to avoid
+ * unnecessary memory allocation for fields/values. */
+typedef struct {
+    robj *subject;
+    int encoding;
+
+    unsigned char *fptr, *vptr;
+
+    dictIterator *di;
+    dictEntry *de;
+} hashTypeIterator;
+
+#include "stream.h"  /* Stream data type header file. */
+
+#define OBJ_HASH_KEY 1
+#define OBJ_HASH_VALUE 2
+
+#define IO_THREADS_OP_IDLE 0
+#define IO_THREADS_OP_READ 1
+#define IO_THREADS_OP_WRITE 2
+extern int io_threads_op;
+
+/*-----------------------------------------------------------------------------
+ * Extern declarations
+ *----------------------------------------------------------------------------*/
+
+extern struct redisServer server;
+extern struct sharedObjectsStruct shared;
+extern dictType objectKeyPointerValueDictType;
+extern dictType objectKeyHeapPointerValueDictType;
+extern dictType setDictType;
+extern dictType BenchmarkDictType;
+extern dictType zsetDictType;
+extern dictType dbDictType;
+extern double R_Zero, R_PosInf, R_NegInf, R_Nan;
+extern dictType hashDictType;
+extern dictType stringSetDictType;
+extern dictType externalStringType;
+extern dictType sdsHashDictType;
+extern dictType dbExpiresDictType;
+extern dictType modulesDictType;
+extern dictType sdsReplyDictType;
+extern dict *modules;
+
+/*-----------------------------------------------------------------------------
+ * Functions prototypes
+ *----------------------------------------------------------------------------*/
+
+/* Command metadata */
+void populateCommandLegacyRangeSpec(struct redisCommand *c);
+int populateArgsStructure(struct redisCommandArg *args);
+
+/* Modules */
+void moduleInitModulesSystem(void);
+void moduleInitModulesSystemLast(void);
+void modulesCron(void);
+int moduleLoad(const char *path, void **argv, int argc, int is_loadex);
+int moduleUnload(sds name);
+void moduleLoadFromQueue(void);
+int moduleGetCommandKeysViaAPI(struct redisCommand *cmd, robj **argv, int argc, getKeysResult *result);
+int moduleGetCommandChannelsViaAPI(struct redisCommand *cmd, robj **argv, int argc, getKeysResult *result);
+moduleType *moduleTypeLookupModuleByID(uint64_t id);
+void moduleTypeNameByID(char *name, uint64_t moduleid);
+const char *moduleTypeModuleName(moduleType *mt);
+const char *moduleNameFromCommand(struct redisCommand *cmd);
+void moduleFreeContext(struct RedisModuleCtx *ctx);
+void unblockClientFromModule(client *c);
+void moduleHandleBlockedClients(void);
+void moduleBlockedClientTimedOut(client *c);
+void modulePipeReadable(aeEventLoop *el, int fd, void *privdata, int mask);
+size_t moduleCount(void);
+void moduleAcquireGIL(void);
+int moduleTryAcquireGIL(void);
+void moduleReleaseGIL(void);
+void moduleNotifyKeyspaceEvent(int type, const char *event, robj *key, int dbid);
+void moduleCallCommandFilters(client *c);
+void ModuleForkDoneHandler(int exitcode, int bysignal);
+int TerminateModuleForkChild(int child_pid, int wait);
+ssize_t rdbSaveModulesAux(rio *rdb, int when);
+int moduleAllDatatypesHandleErrors();
+int moduleAllModulesHandleReplAsyncLoad();
+sds modulesCollectInfo(sds info, dict *sections_dict, int for_crash_report, int sections);
+void moduleFireServerEvent(uint64_t eid, int subid, void *data);
+void processModuleLoadingProgressEvent(int is_aof);
+int moduleTryServeClientBlockedOnKey(client *c, robj *key);
+void moduleUnblockClient(client *c);
+int moduleBlockedClientMayTimeout(client *c);
+int moduleClientIsBlockedOnKeys(client *c);
+void moduleNotifyUserChanged(client *c);
+void moduleNotifyKeyUnlink(robj *key, robj *val, int dbid);
+size_t moduleGetFreeEffort(robj *key, robj *val, int dbid);
+size_t moduleGetMemUsage(robj *key, robj *val, size_t sample_size, int dbid);
+robj *moduleTypeDupOrReply(client *c, robj *fromkey, robj *tokey, int todb, robj *value);
+int moduleDefragValue(robj *key, robj *obj, long *defragged, int dbid);
+int moduleLateDefrag(robj *key, robj *value, unsigned long *cursor, long long endtime, long long *defragged, int dbid);
+long moduleDefragGlobals(void);
+void *moduleGetHandleByName(char *modulename);
+int moduleIsModuleCommand(void *module_handle, struct redisCommand *cmd);
+
+/* Utils */
+long long ustime(void);
+long long mstime(void);
+void getRandomHexChars(char *p, size_t len);
+void getRandomBytes(unsigned char *p, size_t len);
+uint64_t crc64(uint64_t crc, const unsigned char *s, uint64_t l);
+void exitFromChild(int retcode);
+long long redisPopcount(void *s, long count);
+int redisSetProcTitle(char *title);
+int validateProcTitleTemplate(const char *template);
+int redisCommunicateSystemd(const char *sd_notify_msg);
+void redisSetCpuAffinity(const char *cpulist);
+
+/* afterErrorReply flags */
+#define ERR_REPLY_FLAG_NO_STATS_UPDATE (1ULL<<0) /* Indicating that we should not update
+                                                    error stats after sending error reply */
+/* networking.c -- Networking and Client related operations */
+client *createClient(connection *conn);
+void freeClient(client *c);
+void freeClientAsync(client *c);
+void logInvalidUseAndFreeClientAsync(client *c, const char *fmt, ...);
+int beforeNextClient(client *c);
+void clearClientConnectionState(client *c);
+void resetClient(client *c);
+void freeClientOriginalArgv(client *c);
+void freeClientArgv(client *c);
+void sendReplyToClient(connection *conn);
+void *addReplyDeferredLen(client *c);
+void setDeferredArrayLen(client *c, void *node, long length);
+void setDeferredMapLen(client *c, void *node, long length);
+void setDeferredSetLen(client *c, void *node, long length);
+void setDeferredAttributeLen(client *c, void *node, long length);
+void setDeferredPushLen(client *c, void *node, long length);
+int processInputBuffer(client *c);
+void acceptTcpHandler(aeEventLoop *el, int fd, void *privdata, int mask);
+void acceptTLSHandler(aeEventLoop *el, int fd, void *privdata, int mask);
+void acceptUnixHandler(aeEventLoop *el, int fd, void *privdata, int mask);
+void readQueryFromClient(connection *conn);
+int prepareClientToWrite(client *c);
+void addReplyNull(client *c);
+void addReplyNullArray(client *c);
+void addReplyBool(client *c, int b);
+void addReplyVerbatim(client *c, const char *s, size_t len, const char *ext);
+void addReplyProto(client *c, const char *s, size_t len);
+void AddReplyFromClient(client *c, client *src);
+void addReplyBulk(client *c, robj *obj);
+void addReplyBulkCString(client *c, const char *s);
+void addReplyBulkCBuffer(client *c, const void *p, size_t len);
+void addReplyBulkLongLong(client *c, long long ll);
+void addReply(client *c, robj *obj);
+void addReplyStatusLength(client *c, const char *s, size_t len);
+void addReplySds(client *c, sds s);
+void addReplyBulkSds(client *c, sds s);
+void setDeferredReplyBulkSds(client *c, void *node, sds s);
+void addReplyErrorObject(client *c, robj *err);
+void addReplyOrErrorObject(client *c, robj *reply);
+void afterErrorReply(client *c, const char *s, size_t len, int flags);
+void addReplyErrorSdsEx(client *c, sds err, int flags);
+void addReplyErrorSds(client *c, sds err);
+void addReplyErrorSdsSafe(client *c, sds err);
+void addReplyError(client *c, const char *err);
+void addReplyErrorArity(client *c);
+void addReplyErrorExpireTime(client *c);
+void addReplyStatus(client *c, const char *status);
+void addReplyDouble(client *c, double d);
+void addReplyLongLongWithPrefix(client *c, long long ll, char prefix);
+void addReplyBigNum(client *c, const char* num, size_t len);
+void addReplyHumanLongDouble(client *c, long double d);
+void addReplyLongLong(client *c, long long ll);
+void addReplyArrayLen(client *c, long length);
+void addReplyMapLen(client *c, long length);
+void addReplySetLen(client *c, long length);
+void addReplyAttributeLen(client *c, long length);
+void addReplyPushLen(client *c, long length);
+void addReplyHelp(client *c, const char **help);
+void addReplySubcommandSyntaxError(client *c);
+void addReplyLoadedModules(client *c);
+void copyReplicaOutputBuffer(client *dst, client *src);
+void addListRangeReply(client *c, robj *o, long start, long end, int reverse);
+void deferredAfterErrorReply(client *c, list *errors);
+size_t sdsZmallocSize(sds s);
+size_t getStringObjectSdsUsedMemory(robj *o);
+void freeClientReplyValue(void *o);
+void *dupClientReplyValue(void *o);
+char *getClientPeerId(client *client);
+char *getClientSockName(client *client);
+sds catClientInfoString(sds s, client *client);
+sds getAllClientsInfoString(int type);
+int clientSetName(client *c, robj *name);
+void rewriteClientCommandVector(client *c, int argc, ...);
+void rewriteClientCommandArgument(client *c, int i, robj *newval);
+void replaceClientCommandVector(client *c, int argc, robj **argv);
+void redactClientCommandArgument(client *c, int argc);
+size_t getClientOutputBufferMemoryUsage(client *c);
+size_t getClientMemoryUsage(client *c, size_t *output_buffer_mem_usage);
+int freeClientsInAsyncFreeQueue(void);
+int closeClientOnOutputBufferLimitReached(client *c, int async);
+int getClientType(client *c);
+int getClientTypeByName(char *name);
+char *getClientTypeName(int class);
+void flushSlavesOutputBuffers(void);
+void disconnectSlaves(void);
+void evictClients(void);
+int listenToPort(int port, socketFds *fds);
+void pauseClients(pause_purpose purpose, mstime_t end, pause_type type);
+void unpauseClients(pause_purpose purpose);
+int areClientsPaused(void);
+int checkClientPauseTimeoutAndReturnIfPaused(void);
+void unblockPostponedClients();
+void processEventsWhileBlocked(void);
+void whileBlockedCron();
+void blockingOperationStarts();
+void blockingOperationEnds();
+int handleClientsWithPendingWrites(void);
+int handleClientsWithPendingWritesUsingThreads(void);
+int handleClientsWithPendingReadsUsingThreads(void);
+int stopThreadedIOIfNeeded(void);
+int clientHasPendingReplies(client *c);
+int islocalClient(client *c);
+int updateClientMemUsageAndBucket(client *c);
+void removeClientFromMemUsageBucket(client *c, int allow_eviction);
+void unlinkClient(client *c);
+int writeToClient(client *c, int handler_installed);
+void linkClient(client *c);
+void protectClient(client *c);
+void unprotectClient(client *c);
+void initThreadedIO(void);
+client *lookupClientByID(uint64_t id);
+int authRequired(client *c);
+void putClientInPendingWriteQueue(client *c);
+
+#ifdef __GNUC__
+void addReplyErrorFormatEx(client *c, int flags, const char *fmt, ...)
+    __attribute__((format(printf, 3, 4)));
+void addReplyErrorFormat(client *c, const char *fmt, ...)
+    __attribute__((format(printf, 2, 3)));
+void addReplyStatusFormat(client *c, const char *fmt, ...)
+    __attribute__((format(printf, 2, 3)));
+#else
+void addReplyErrorFormatEx(client *c, int flags, const char *fmt, ...);
+void addReplyErrorFormat(client *c, const char *fmt, ...);
+void addReplyStatusFormat(client *c, const char *fmt, ...);
+#endif
+
+/* Client side caching (tracking mode) */
+void enableTracking(client *c, uint64_t redirect_to, uint64_t options, robj **prefix, size_t numprefix);
+void disableTracking(client *c);
+void trackingRememberKeys(client *c);
+void trackingInvalidateKey(client *c, robj *keyobj, int bcast);
+void trackingScheduleKeyInvalidation(uint64_t client_id, robj *keyobj);
+void trackingHandlePendingKeyInvalidations(void);
+void trackingInvalidateKeysOnFlush(int async);
+void freeTrackingRadixTree(rax *rt);
+void freeTrackingRadixTreeAsync(rax *rt);
+void trackingLimitUsedSlots(void);
+uint64_t trackingGetTotalItems(void);
+uint64_t trackingGetTotalKeys(void);
+uint64_t trackingGetTotalPrefixes(void);
+void trackingBroadcastInvalidationMessages(void);
+int checkPrefixCollisionsOrReply(client *c, robj **prefix, size_t numprefix);
+
+/* List data type */
+void listTypePush(robj *subject, robj *value, int where);
+robj *listTypePop(robj *subject, int where);
+unsigned long listTypeLength(const robj *subject);
+listTypeIterator *listTypeInitIterator(robj *subject, long index, unsigned char direction);
+void listTypeReleaseIterator(listTypeIterator *li);
+void listTypeSetIteratorDirection(listTypeIterator *li, unsigned char direction);
+int listTypeNext(listTypeIterator *li, listTypeEntry *entry);
+robj *listTypeGet(listTypeEntry *entry);
+void listTypeInsert(listTypeEntry *entry, robj *value, int where);
+void listTypeReplace(listTypeEntry *entry, robj *value);
+int listTypeEqual(listTypeEntry *entry, robj *o);
+void listTypeDelete(listTypeIterator *iter, listTypeEntry *entry);
+robj *listTypeDup(robj *o);
+int listTypeDelRange(robj *o, long start, long stop);
+void unblockClientWaitingData(client *c);
+void popGenericCommand(client *c, int where);
+void listElementsRemoved(client *c, robj *key, int where, robj *o, long count, int *deleted);
+
+/* MULTI/EXEC/WATCH... */
+void unwatchAllKeys(client *c);
+void initClientMultiState(client *c);
+void freeClientMultiState(client *c);
+void queueMultiCommand(client *c, uint64_t cmd_flags);
+size_t multiStateMemOverhead(client *c);
+void touchWatchedKey(redisDb *db, robj *key);
+int isWatchedKeyExpired(client *c);
+void touchAllWatchedKeysInDb(redisDb *emptied, redisDb *replaced_with);
+void discardTransaction(client *c);
+void flagTransaction(client *c);
+void execCommandAbort(client *c, sds error);
+
+/* Redis object implementation */
+void decrRefCount(robj *o);
+void decrRefCountVoid(void *o);
+void incrRefCount(robj *o);
+robj *makeObjectShared(robj *o);
+void freeStringObject(robj *o);
+void freeListObject(robj *o);
+void freeSetObject(robj *o);
+void freeZsetObject(robj *o);
+void freeHashObject(robj *o);
+void dismissObject(robj *o, size_t dump_size);
+robj *createObject(int type, void *ptr);
+robj *createStringObject(const char *ptr, size_t len);
+robj *createRawStringObject(const char *ptr, size_t len);
+robj *createEmbeddedStringObject(const char *ptr, size_t len);
+robj *tryCreateRawStringObject(const char *ptr, size_t len);
+robj *tryCreateStringObject(const char *ptr, size_t len);
+robj *dupStringObject(const robj *o);
+int isSdsRepresentableAsLongLong(sds s, long long *llval);
+int isObjectRepresentableAsLongLong(robj *o, long long *llongval);
+robj *tryObjectEncoding(robj *o);
+robj *getDecodedObject(robj *o);
+size_t stringObjectLen(robj *o);
+robj *createStringObjectFromLongLong(long long value);
+robj *createStringObjectFromLongLongForValue(long long value);
+robj *createStringObjectFromLongDouble(long double value, int humanfriendly);
+robj *createQuicklistObject(void);
+robj *createSetObject(void);
+robj *createIntsetObject(void);
+robj *createHashObject(void);
+robj *createZsetObject(void);
+robj *createZsetListpackObject(void);
+robj *createStreamObject(void);
+robj *createModuleObject(moduleType *mt, void *value);
+int getLongFromObjectOrReply(client *c, robj *o, long *target, const char *msg);
+int getPositiveLongFromObjectOrReply(client *c, robj *o, long *target, const char *msg);
+int getRangeLongFromObjectOrReply(client *c, robj *o, long min, long max, long *target, const char *msg);
+int checkType(client *c, robj *o, int type);
+int getLongLongFromObjectOrReply(client *c, robj *o, long long *target, const char *msg);
+int getDoubleFromObjectOrReply(client *c, robj *o, double *target, const char *msg);
+int getDoubleFromObject(const robj *o, double *target);
+int getLongLongFromObject(robj *o, long long *target);
+int getLongDoubleFromObject(robj *o, long double *target);
+int getLongDoubleFromObjectOrReply(client *c, robj *o, long double *target, const char *msg);
+int getIntFromObjectOrReply(client *c, robj *o, int *target, const char *msg);
+char *strEncoding(int encoding);
+int compareStringObjects(robj *a, robj *b);
+int collateStringObjects(robj *a, robj *b);
+int equalStringObjects(robj *a, robj *b);
+unsigned long long estimateObjectIdleTime(robj *o);
+void trimStringObjectIfNeeded(robj *o);
+#define sdsEncodedObject(objptr) (objptr->encoding == OBJ_ENCODING_RAW || objptr->encoding == OBJ_ENCODING_EMBSTR)
+
+/* Synchronous I/O with timeout */
+ssize_t syncWrite(int fd, char *ptr, ssize_t size, long long timeout);
+ssize_t syncRead(int fd, char *ptr, ssize_t size, long long timeout);
+ssize_t syncReadLine(int fd, char *ptr, ssize_t size, long long timeout);
+
+/* Replication */
+void replicationFeedSlaves(list *slaves, int dictid, robj **argv, int argc);
+void replicationFeedStreamFromMasterStream(char *buf, size_t buflen);
+void resetReplicationBuffer(void);
+void feedReplicationBuffer(char *buf, size_t len);
+void freeReplicaReferencedReplBuffer(client *replica);
+void replicationFeedMonitors(client *c, list *monitors, int dictid, robj **argv, int argc);
+void updateSlavesWaitingBgsave(int bgsaveerr, int type);
+void replicationCron(void);
+void replicationStartPendingFork(void);
+void replicationHandleMasterDisconnection(void);
+void replicationCacheMaster(client *c);
+void resizeReplicationBacklog();
+void replicationSetMaster(char *ip, int port);
+void replicationUnsetMaster(void);
+void refreshGoodSlavesCount(void);
+int checkGoodReplicasStatus(void);
+void processClientsWaitingReplicas(void);
+void unblockClientWaitingReplicas(client *c);
+int replicationCountAcksByOffset(long long offset);
+void replicationSendNewlineToMaster(void);
+long long replicationGetSlaveOffset(void);
+char *replicationGetSlaveName(client *c);
+long long getPsyncInitialOffset(void);
+int replicationSetupSlaveForFullResync(client *slave, long long offset);
+void changeReplicationId(void);
+void clearReplicationId2(void);
+void createReplicationBacklog(void);
+void freeReplicationBacklog(void);
+void replicationCacheMasterUsingMyself(void);
+void feedReplicationBacklog(void *ptr, size_t len);
+void incrementalTrimReplicationBacklog(size_t blocks);
+int canFeedReplicaReplBuffer(client *replica);
+void rebaseReplicationBuffer(long long base_repl_offset);
+void showLatestBacklog(void);
+void rdbPipeReadHandler(struct aeEventLoop *eventLoop, int fd, void *clientData, int mask);
+void rdbPipeWriteHandlerConnRemoved(struct connection *conn);
+void clearFailoverState(void);
+void updateFailoverStatus(void);
+void abortFailover(const char *err);
+const char *getFailoverStateString();
+
+/* Generic persistence functions */
+void startLoadingFile(size_t size, char* filename, int rdbflags);
+void startLoading(size_t size, int rdbflags, int async);
+void loadingAbsProgress(off_t pos);
+void loadingIncrProgress(off_t size);
+void stopLoading(int success);
+void updateLoadingFileName(char* filename);
+void startSaving(int rdbflags);
+void stopSaving(int success);
+int allPersistenceDisabled(void);
+
+#define DISK_ERROR_TYPE_AOF 1       /* Don't accept writes: AOF errors. */
+#define DISK_ERROR_TYPE_RDB 2       /* Don't accept writes: RDB errors. */
+#define DISK_ERROR_TYPE_NONE 0      /* No problems, we can accept writes. */
+int writeCommandsDeniedByDiskError(void);
+sds writeCommandsGetDiskErrorMessage(int);
+
+/* RDB persistence */
+#include "rdb.h"
+void killRDBChild(void);
+int bg_unlink(const char *filename);
+
+/* AOF persistence */
+void flushAppendOnlyFile(int force);
+void feedAppendOnlyFile(int dictid, robj **argv, int argc);
+void aofRemoveTempFile(pid_t childpid);
+int rewriteAppendOnlyFileBackground(void);
+int loadAppendOnlyFiles(aofManifest *am);
+void stopAppendOnly(void);
+int startAppendOnly(void);
+void backgroundRewriteDoneHandler(int exitcode, int bysignal);
+ssize_t aofReadDiffFromParent(void);
+void killAppendOnlyChild(void);
+void restartAOFAfterSYNC();
+void aofLoadManifestFromDisk(void);
+void aofOpenIfNeededOnServerStart(void);
+void aofManifestFree(aofManifest *am);
+int aofDelHistoryFiles(void);
+int aofRewriteLimited(void);
+
+/* Child info */
+void openChildInfoPipe(void);
+void closeChildInfoPipe(void);
+void sendChildInfoGeneric(childInfoType info_type, size_t keys, double progress, char *pname);
+void sendChildCowInfo(childInfoType info_type, char *pname);
+void sendChildInfo(childInfoType info_type, size_t keys, char *pname);
+void receiveChildInfo(void);
+
+/* Fork helpers */
+int redisFork(int purpose);
+int hasActiveChildProcess();
+void resetChildState();
+int isMutuallyExclusiveChildType(int type);
+
+/* acl.c -- Authentication related prototypes. */
+extern rax *Users;
+extern user *DefaultUser;
+void ACLInit(void);
+/* Return values for ACLCheckAllPerm(). */
+#define ACL_OK 0
+#define ACL_DENIED_CMD 1
+#define ACL_DENIED_KEY 2
+#define ACL_DENIED_AUTH 3 /* Only used for ACL LOG entries. */
+#define ACL_DENIED_CHANNEL 4 /* Only used for pub/sub commands */
+
+/* Context values for addACLLogEntry(). */
+#define ACL_LOG_CTX_TOPLEVEL 0
+#define ACL_LOG_CTX_LUA 1
+#define ACL_LOG_CTX_MULTI 2
+#define ACL_LOG_CTX_MODULE 3
+
+/* ACL key permission types */
+#define ACL_READ_PERMISSION (1<<0)
+#define ACL_WRITE_PERMISSION (1<<1)
+#define ACL_ALL_PERMISSION (ACL_READ_PERMISSION|ACL_WRITE_PERMISSION)
+
+int ACLCheckUserCredentials(robj *username, robj *password);
+int ACLAuthenticateUser(client *c, robj *username, robj *password);
+unsigned long ACLGetCommandID(sds cmdname);
+void ACLClearCommandID(void);
+user *ACLGetUserByName(const char *name, size_t namelen);
+int ACLUserCheckKeyPerm(user *u, const char *key, int keylen, int flags);
+int ACLUserCheckChannelPerm(user *u, sds channel, int literal);
+int ACLCheckAllUserCommandPerm(user *u, struct redisCommand *cmd, robj **argv, int argc, int *idxptr);
+int ACLUserCheckCmdWithUnrestrictedKeyAccess(user *u, struct redisCommand *cmd, robj **argv, int argc, int flags);
+int ACLCheckAllPerm(client *c, int *idxptr);
+int ACLSetUser(user *u, const char *op, ssize_t oplen);
+sds ACLStringSetUser(user *u, sds username, sds *argv, int argc);
+uint64_t ACLGetCommandCategoryFlagByName(const char *name);
+int ACLAppendUserForLoading(sds *argv, int argc, int *argc_err);
+const char *ACLSetUserStringError(void);
+int ACLLoadConfiguredUsers(void);
+robj *ACLDescribeUser(user *u);
+void ACLLoadUsersAtStartup(void);
+void addReplyCommandCategories(client *c, struct redisCommand *cmd);
+user *ACLCreateUnlinkedUser();
+void ACLFreeUserAndKillClients(user *u);
+void addACLLogEntry(client *c, int reason, int context, int argpos, sds username, sds object);
+const char* getAclErrorMessage(int acl_res);
+void ACLUpdateDefaultUserPassword(sds password);
+
+/* Sorted sets data type */
+
+/* Input flags. */
+#define ZADD_IN_NONE 0
+#define ZADD_IN_INCR (1<<0)    /* Increment the score instead of setting it. */
+#define ZADD_IN_NX (1<<1)      /* Don't touch elements not already existing. */
+#define ZADD_IN_XX (1<<2)      /* Only touch elements already existing. */
+#define ZADD_IN_GT (1<<3)      /* Only update existing when new scores are higher. */
+#define ZADD_IN_LT (1<<4)      /* Only update existing when new scores are lower. */
+
+/* Output flags. */
+#define ZADD_OUT_NOP (1<<0)     /* Operation not performed because of conditionals.*/
+#define ZADD_OUT_NAN (1<<1)     /* Only touch elements already existing. */
+#define ZADD_OUT_ADDED (1<<2)   /* The element was new and was added. */
+#define ZADD_OUT_UPDATED (1<<3) /* The element already existed, score updated. */
+
+/* Struct to hold an inclusive/exclusive range spec by score comparison. */
+typedef struct {
+    double min, max;
+    int minex, maxex; /* are min or max exclusive? */
+} zrangespec;
+
+/* Struct to hold an inclusive/exclusive range spec by lexicographic comparison. */
+typedef struct {
+    sds min, max;     /* May be set to shared.(minstring|maxstring) */
+    int minex, maxex; /* are min or max exclusive? */
+} zlexrangespec;
+
+/* flags for incrCommandFailedCalls */
+#define ERROR_COMMAND_REJECTED (1<<0) /* Indicate to update the command rejected stats */
+#define ERROR_COMMAND_FAILED (1<<1) /* Indicate to update the command failed stats */
+
+zskiplist *zslCreate(void);
+void zslFree(zskiplist *zsl);
+zskiplistNode *zslInsert(zskiplist *zsl, double score, sds ele);
+unsigned char *zzlInsert(unsigned char *zl, sds ele, double score);
+int zslDelete(zskiplist *zsl, double score, sds ele, zskiplistNode **node);
+zskiplistNode *zslFirstInRange(zskiplist *zsl, zrangespec *range);
+zskiplistNode *zslLastInRange(zskiplist *zsl, zrangespec *range);
+double zzlGetScore(unsigned char *sptr);
+void zzlNext(unsigned char *zl, unsigned char **eptr, unsigned char **sptr);
+void zzlPrev(unsigned char *zl, unsigned char **eptr, unsigned char **sptr);
+unsigned char *zzlFirstInRange(unsigned char *zl, zrangespec *range);
+unsigned char *zzlLastInRange(unsigned char *zl, zrangespec *range);
+unsigned long zsetLength(const robj *zobj);
+void zsetConvert(robj *zobj, int encoding);
+void zsetConvertToListpackIfNeeded(robj *zobj, size_t maxelelen, size_t totelelen);
+int zsetScore(robj *zobj, sds member, double *score);
+unsigned long zslGetRank(zskiplist *zsl, double score, sds o);
+int zsetAdd(robj *zobj, double score, sds ele, int in_flags, int *out_flags, double *newscore);
+long zsetRank(robj *zobj, sds ele, int reverse);
+int zsetDel(robj *zobj, sds ele);
+robj *zsetDup(robj *o);
+void genericZpopCommand(client *c, robj **keyv, int keyc, int where, int emitkey, long count, int use_nested_array, int reply_nil_when_empty, int *deleted);
+sds lpGetObject(unsigned char *sptr);
+int zslValueGteMin(double value, zrangespec *spec);
+int zslValueLteMax(double value, zrangespec *spec);
+void zslFreeLexRange(zlexrangespec *spec);
+int zslParseLexRange(robj *min, robj *max, zlexrangespec *spec);
+unsigned char *zzlFirstInLexRange(unsigned char *zl, zlexrangespec *range);
+unsigned char *zzlLastInLexRange(unsigned char *zl, zlexrangespec *range);
+zskiplistNode *zslFirstInLexRange(zskiplist *zsl, zlexrangespec *range);
+zskiplistNode *zslLastInLexRange(zskiplist *zsl, zlexrangespec *range);
+int zzlLexValueGteMin(unsigned char *p, zlexrangespec *spec);
+int zzlLexValueLteMax(unsigned char *p, zlexrangespec *spec);
+int zslLexValueGteMin(sds value, zlexrangespec *spec);
+int zslLexValueLteMax(sds value, zlexrangespec *spec);
+
+/* Core functions */
+int getMaxmemoryState(size_t *total, size_t *logical, size_t *tofree, float *level);
+size_t freeMemoryGetNotCountedMemory();
+int overMaxmemoryAfterAlloc(size_t moremem);
+uint64_t getCommandFlags(client *c);
+int processCommand(client *c);
+int processPendingCommandAndInputBuffer(client *c);
+void setupSignalHandlers(void);
+void removeSignalHandlers(void);
+int createSocketAcceptHandler(socketFds *sfd, aeFileProc *accept_handler);
+int changeListenPort(int port, socketFds *sfd, aeFileProc *accept_handler);
+int changeBindAddr(void);
+struct redisCommand *lookupSubcommand(struct redisCommand *container, sds sub_name);
+struct redisCommand *lookupCommand(robj **argv, int argc);
+struct redisCommand *lookupCommandBySdsLogic(dict *commands, sds s);
+struct redisCommand *lookupCommandBySds(sds s);
+struct redisCommand *lookupCommandByCStringLogic(dict *commands, const char *s);
+struct redisCommand *lookupCommandByCString(const char *s);
+struct redisCommand *lookupCommandOrOriginal(robj **argv, int argc);
+int commandCheckExistence(client *c, sds *err);
+int commandCheckArity(client *c, sds *err);
+void startCommandExecution();
+int incrCommandStatsOnError(struct redisCommand *cmd, int flags);
+void call(client *c, int flags);
+void alsoPropagate(int dbid, robj **argv, int argc, int target);
+void propagatePendingCommands();
+void redisOpArrayInit(redisOpArray *oa);
+void redisOpArrayFree(redisOpArray *oa);
+void forceCommandPropagation(client *c, int flags);
+void preventCommandPropagation(client *c);
+void preventCommandAOF(client *c);
+void preventCommandReplication(client *c);
+void slowlogPushCurrentCommand(client *c, struct redisCommand *cmd, ustime_t duration);
+void updateCommandLatencyHistogram(struct hdr_histogram** latency_histogram, int64_t duration_hist);
+int prepareForShutdown(int flags);
+void replyToClientsBlockedOnShutdown(void);
+int abortShutdown(void);
+void afterCommand(client *c);
+int mustObeyClient(client *c);
+#ifdef __GNUC__
+void _serverLog(int level, const char *fmt, ...)
+    __attribute__((format(printf, 2, 3)));
+#else
+void _serverLog(int level, const char *fmt, ...);
+#endif
+void serverLogRaw(int level, const char *msg);
+void serverLogFromHandler(int level, const char *msg);
+void usage(void);
+void updateDictResizePolicy(void);
+int htNeedsResize(dict *dict);
+void populateCommandTable(void);
+void resetCommandTableStats(dict* commands);
+void resetErrorTableStats(void);
+void adjustOpenFilesLimit(void);
+void incrementErrorCount(const char *fullerr, size_t namelen);
+void closeListeningSockets(int unlink_unix_socket);
+void updateCachedTime(int update_daylight_info);
+void resetServerStats(void);
+void activeDefragCycle(void);
+unsigned int getLRUClock(void);
+unsigned int LRU_CLOCK(void);
+const char *evictPolicyToString(void);
+struct redisMemOverhead *getMemoryOverheadData(void);
+void freeMemoryOverheadData(struct redisMemOverhead *mh);
+void checkChildrenDone(void);
+int setOOMScoreAdj(int process_class);
+void rejectCommandFormat(client *c, const char *fmt, ...);
+void *activeDefragAlloc(void *ptr);
+robj *activeDefragStringOb(robj* ob, long *defragged);
+void dismissSds(sds s);
+void dismissMemory(void* ptr, size_t size_hint);
+void dismissMemoryInChild(void);
+
+#define RESTART_SERVER_NONE 0
+#define RESTART_SERVER_GRACEFULLY (1<<0)     /* Do proper shutdown. */
+#define RESTART_SERVER_CONFIG_REWRITE (1<<1) /* CONFIG REWRITE before restart.*/
+int restartServer(int flags, mstime_t delay);
+
+/* Set data type */
+robj *setTypeCreate(sds value);
+int setTypeAdd(robj *subject, sds value);
+int setTypeRemove(robj *subject, sds value);
+int setTypeIsMember(robj *subject, sds value);
+setTypeIterator *setTypeInitIterator(robj *subject);
+void setTypeReleaseIterator(setTypeIterator *si);
+int setTypeNext(setTypeIterator *si, sds *sdsele, int64_t *llele);
+sds setTypeNextObject(setTypeIterator *si);
+int setTypeRandomElement(robj *setobj, sds *sdsele, int64_t *llele);
+unsigned long setTypeRandomElements(robj *set, unsigned long count, robj *aux_set);
+unsigned long setTypeSize(const robj *subject);
+void setTypeConvert(robj *subject, int enc);
+robj *setTypeDup(robj *o);
+
+/* Hash data type */
+#define HASH_SET_TAKE_FIELD (1<<0)
+#define HASH_SET_TAKE_VALUE (1<<1)
+#define HASH_SET_COPY 0
+
+void hashTypeConvert(robj *o, int enc);
+void hashTypeTryConversion(robj *subject, robj **argv, int start, int end);
+int hashTypeExists(robj *o, sds key);
+int hashTypeDelete(robj *o, sds key);
+unsigned long hashTypeLength(const robj *o);
+hashTypeIterator *hashTypeInitIterator(robj *subject);
+void hashTypeReleaseIterator(hashTypeIterator *hi);
+int hashTypeNext(hashTypeIterator *hi);
+void hashTypeCurrentFromListpack(hashTypeIterator *hi, int what,
+                                 unsigned char **vstr,
+                                 unsigned int *vlen,
+                                 long long *vll);
+sds hashTypeCurrentFromHashTable(hashTypeIterator *hi, int what);
+void hashTypeCurrentObject(hashTypeIterator *hi, int what, unsigned char **vstr, unsigned int *vlen, long long *vll);
+sds hashTypeCurrentObjectNewSds(hashTypeIterator *hi, int what);
+robj *hashTypeLookupWriteOrCreate(client *c, robj *key);
+robj *hashTypeGetValueObject(robj *o, sds field);
+int hashTypeSet(robj *o, sds field, sds value, int flags);
+robj *hashTypeDup(robj *o);
+
+/* Pub / Sub */
+int pubsubUnsubscribeAllChannels(client *c, int notify);
+int pubsubUnsubscribeShardAllChannels(client *c, int notify);
+void pubsubUnsubscribeShardChannels(robj **channels, unsigned int count);
+int pubsubUnsubscribeAllPatterns(client *c, int notify);
+int pubsubPublishMessage(robj *channel, robj *message, int sharded);
+int pubsubPublishMessageAndPropagateToCluster(robj *channel, robj *message, int sharded);
+void addReplyPubsubMessage(client *c, robj *channel, robj *msg, robj *message_bulk);
+int serverPubsubSubscriptionCount();
+int serverPubsubShardSubscriptionCount();
+size_t pubsubMemOverhead(client *c);
+
+/* Keyspace events notification */
+void notifyKeyspaceEvent(int type, char *event, robj *key, int dbid);
+int keyspaceEventsStringToFlags(char *classes);
+sds keyspaceEventsFlagsToString(int flags);
+
+/* Configuration */
+/* Configuration Flags */
+#define MODIFIABLE_CONFIG 0 /* This is the implied default for a standard 
+                             * config, which is mutable. */
+#define IMMUTABLE_CONFIG (1ULL<<0) /* Can this value only be set at startup? */
+#define SENSITIVE_CONFIG (1ULL<<1) /* Does this value contain sensitive information */
+#define DEBUG_CONFIG (1ULL<<2) /* Values that are useful for debugging. */
+#define MULTI_ARG_CONFIG (1ULL<<3) /* This config receives multiple arguments. */
+#define HIDDEN_CONFIG (1ULL<<4) /* This config is hidden in `config get <pattern>` (used for tests/debugging) */
+#define PROTECTED_CONFIG (1ULL<<5) /* Becomes immutable if enable-protected-configs is enabled. */
+#define DENY_LOADING_CONFIG (1ULL<<6) /* This config is forbidden during loading. */
+#define ALIAS_CONFIG (1ULL<<7) /* For configs with multiple names, this flag is set on the alias. */
+#define MODULE_CONFIG (1ULL<<8) /* This config is a module config */
+#define VOLATILE_CONFIG (1ULL<<9) /* The config is a reference to the config data and not the config data itself (ex.
+                                   * a file name containing more configuration like a tls key). In this case we want
+                                   * to apply the configuration change even if the new config value is the same as
+                                   * the old. */
+
+#define INTEGER_CONFIG 0 /* No flags means a simple integer configuration */
+#define MEMORY_CONFIG (1<<0) /* Indicates if this value can be loaded as a memory value */
+#define PERCENT_CONFIG (1<<1) /* Indicates if this value can be loaded as a percent (and stored as a negative int) */
+#define OCTAL_CONFIG (1<<2) /* This value uses octal representation */
+
+/* Enum Configs contain an array of configEnum objects that match a string with an integer. */
+typedef struct configEnum {
+    char *name;
+    int val;
+} configEnum;
+
+/* Type of configuration. */
+typedef enum {
+    BOOL_CONFIG,
+    NUMERIC_CONFIG,
+    STRING_CONFIG,
+    SDS_CONFIG,
+    ENUM_CONFIG,
+    SPECIAL_CONFIG,
+} configType;
+
+void loadServerConfig(char *filename, char config_from_stdin, char *options);
+void appendServerSaveParams(time_t seconds, int changes);
+void resetServerSaveParams(void);
+struct rewriteConfigState; /* Forward declaration to export API. */
+void rewriteConfigRewriteLine(struct rewriteConfigState *state, const char *option, sds line, int force);
+void rewriteConfigMarkAsProcessed(struct rewriteConfigState *state, const char *option);
+int rewriteConfig(char *path, int force_write);
+void initConfigValues();
+void removeConfig(sds name);
+sds getConfigDebugInfo();
+int allowProtectedAction(int config, client *c);
+void initServerClientMemUsageBuckets();
+void freeServerClientMemUsageBuckets();
+
+/* Module Configuration */
+typedef struct ModuleConfig ModuleConfig;
+int performModuleConfigSetFromName(sds name, sds value, const char **err);
+int performModuleConfigSetDefaultFromName(sds name, const char **err);
+void addModuleBoolConfig(const char *module_name, const char *name, int flags, void *privdata, int default_val);
+void addModuleStringConfig(const char *module_name, const char *name, int flags, void *privdata, sds default_val);
+void addModuleEnumConfig(const char *module_name, const char *name, int flags, void *privdata, int default_val, configEnum *enum_vals);
+void addModuleNumericConfig(const char *module_name, const char *name, int flags, void *privdata, long long default_val, int conf_flags, long long lower, long long upper);
+void addModuleConfigApply(list *module_configs, ModuleConfig *module_config);
+int moduleConfigApplyConfig(list *module_configs, const char **err, const char **err_arg_name);
+int getModuleBoolConfig(ModuleConfig *module_config);
+int setModuleBoolConfig(ModuleConfig *config, int val, const char **err);
+sds getModuleStringConfig(ModuleConfig *module_config);
+int setModuleStringConfig(ModuleConfig *config, sds strval, const char **err);
+int getModuleEnumConfig(ModuleConfig *module_config);
+int setModuleEnumConfig(ModuleConfig *config, int val, const char **err);
+long long getModuleNumericConfig(ModuleConfig *module_config);
+int setModuleNumericConfig(ModuleConfig *config, long long val, const char **err);
+
+/* db.c -- Keyspace access API */
+int removeExpire(redisDb *db, robj *key);
+void deleteExpiredKeyAndPropagate(redisDb *db, robj *keyobj);
+void propagateDeletion(redisDb *db, robj *key, int lazy);
+int keyIsExpired(redisDb *db, robj *key);
+long long getExpire(redisDb *db, robj *key);
+void setExpire(client *c, redisDb *db, robj *key, long long when);
+int checkAlreadyExpired(long long when);
+robj *lookupKeyRead(redisDb *db, robj *key);
+robj *lookupKeyWrite(redisDb *db, robj *key);
+robj *lookupKeyReadOrReply(client *c, robj *key, robj *reply);
+robj *lookupKeyWriteOrReply(client *c, robj *key, robj *reply);
+robj *lookupKeyReadWithFlags(redisDb *db, robj *key, int flags);
+robj *lookupKeyWriteWithFlags(redisDb *db, robj *key, int flags);
+robj *objectCommandLookup(client *c, robj *key);
+robj *objectCommandLookupOrReply(client *c, robj *key, robj *reply);
+int objectSetLRUOrLFU(robj *val, long long lfu_freq, long long lru_idle,
+                       long long lru_clock, int lru_multiplier);
+#define LOOKUP_NONE 0
+#define LOOKUP_NOTOUCH (1<<0)  /* Don't update LRU. */
+#define LOOKUP_NONOTIFY (1<<1) /* Don't trigger keyspace event on key misses. */
+#define LOOKUP_NOSTATS (1<<2)  /* Don't update keyspace hits/misses counters. */
+#define LOOKUP_WRITE (1<<3)    /* Delete expired keys even in replicas. */
+#define LOOKUP_NOEXPIRE (1<<4) /* Avoid deleting lazy expired keys. */
+
+void dbAdd(redisDb *db, robj *key, robj *val);
+int dbAddRDBLoad(redisDb *db, sds key, robj *val);
+void dbOverwrite(redisDb *db, robj *key, robj *val);
+
+#define SETKEY_KEEPTTL 1
+#define SETKEY_NO_SIGNAL 2
+#define SETKEY_ALREADY_EXIST 4
+#define SETKEY_DOESNT_EXIST 8
+void setKey(client *c, redisDb *db, robj *key, robj *val, int flags);
+robj *dbRandomKey(redisDb *db);
+int dbSyncDelete(redisDb *db, robj *key);
+int dbDelete(redisDb *db, robj *key);
+robj *dbUnshareStringValue(redisDb *db, robj *key, robj *o);
+
+#define EMPTYDB_NO_FLAGS 0      /* No flags. */
+#define EMPTYDB_ASYNC (1<<0)    /* Reclaim memory in another thread. */
+#define EMPTYDB_NOFUNCTIONS (1<<1) /* Indicate not to flush the functions. */
+long long emptyData(int dbnum, int flags, void(callback)(dict*));
+long long emptyDbStructure(redisDb *dbarray, int dbnum, int async, void(callback)(dict*));
+void flushAllDataAndResetRDB(int flags);
+long long dbTotalServerKeyCount();
+redisDb *initTempDb(void);
+void discardTempDb(redisDb *tempDb, void(callback)(dict*));
+
+
+int selectDb(client *c, int id);
+void signalModifiedKey(client *c, redisDb *db, robj *key);
+void signalFlushedDb(int dbid, int async);
+void scanGenericCommand(client *c, robj *o, unsigned long cursor);
+int parseScanCursorOrReply(client *c, robj *o, unsigned long *cursor);
+int dbAsyncDelete(redisDb *db, robj *key);
+void emptyDbAsync(redisDb *db);
+size_t lazyfreeGetPendingObjectsCount(void);
+size_t lazyfreeGetFreedObjectsCount(void);
+void lazyfreeResetStats(void);
+void freeObjAsync(robj *key, robj *obj, int dbid);
+void freeReplicationBacklogRefMemAsync(list *blocks, rax *index);
+
+/* API to get key arguments from commands */
+#define GET_KEYSPEC_DEFAULT 0
+#define GET_KEYSPEC_INCLUDE_NOT_KEYS (1<<0) /* Consider 'fake' keys as keys */
+#define GET_KEYSPEC_RETURN_PARTIAL (1<<1) /* Return all keys that can be found */
+
+int getKeysFromCommandWithSpecs(struct redisCommand *cmd, robj **argv, int argc, int search_flags, getKeysResult *result);
+keyReference *getKeysPrepareResult(getKeysResult *result, int numkeys);
+int getKeysFromCommand(struct redisCommand *cmd, robj **argv, int argc, getKeysResult *result);
+int doesCommandHaveKeys(struct redisCommand *cmd);
+int getChannelsFromCommand(struct redisCommand *cmd, robj **argv, int argc, getKeysResult *result);
+int doesCommandHaveChannelsWithFlags(struct redisCommand *cmd, int flags);
+void getKeysFreeResult(getKeysResult *result);
+int sintercardGetKeys(struct redisCommand *cmd,robj **argv, int argc, getKeysResult *result);
+int zunionInterDiffGetKeys(struct redisCommand *cmd,robj **argv, int argc, getKeysResult *result);
+int zunionInterDiffStoreGetKeys(struct redisCommand *cmd,robj **argv, int argc, getKeysResult *result);
+int evalGetKeys(struct redisCommand *cmd, robj **argv, int argc, getKeysResult *result);
+int functionGetKeys(struct redisCommand *cmd, robj **argv, int argc, getKeysResult *result);
+int sortGetKeys(struct redisCommand *cmd, robj **argv, int argc, getKeysResult *result);
+int sortROGetKeys(struct redisCommand *cmd, robj **argv, int argc, getKeysResult *result);
+int migrateGetKeys(struct redisCommand *cmd, robj **argv, int argc, getKeysResult *result);
+int georadiusGetKeys(struct redisCommand *cmd, robj **argv, int argc, getKeysResult *result);
+int xreadGetKeys(struct redisCommand *cmd, robj **argv, int argc, getKeysResult *result);
+int lmpopGetKeys(struct redisCommand *cmd, robj **argv, int argc, getKeysResult *result);
+int blmpopGetKeys(struct redisCommand *cmd, robj **argv, int argc, getKeysResult *result);
+int zmpopGetKeys(struct redisCommand *cmd, robj **argv, int argc, getKeysResult *result);
+int bzmpopGetKeys(struct redisCommand *cmd, robj **argv, int argc, getKeysResult *result);
+int setGetKeys(struct redisCommand *cmd, robj **argv, int argc, getKeysResult *result);
+int bitfieldGetKeys(struct redisCommand *cmd, robj **argv, int argc, getKeysResult *result);
+
+unsigned short crc16(const char *buf, int len);
+
+/* Sentinel */
+void initSentinelConfig(void);
+void initSentinel(void);
+void sentinelTimer(void);
+const char *sentinelHandleConfiguration(char **argv, int argc);
+void queueSentinelConfig(sds *argv, int argc, int linenum, sds line);
+void loadSentinelConfigFromQueue(void);
+void sentinelIsRunning(void);
+void sentinelCheckConfigFile(void);
+void sentinelCommand(client *c);
+void sentinelInfoCommand(client *c);
+void sentinelPublishCommand(client *c);
+void sentinelRoleCommand(client *c);
+
+/* redis-check-rdb & aof */
+int redis_check_rdb(char *rdbfilename, FILE *fp);
+int redis_check_rdb_main(int argc, char **argv, FILE *fp);
+int redis_check_aof_main(int argc, char **argv);
+
+/* Scripting */
+void scriptingInit(int setup);
+int ldbRemoveChild(pid_t pid);
+void ldbKillForkedSessions(void);
+int ldbPendingChildren(void);
+sds luaCreateFunction(client *c, robj *body);
+void luaLdbLineHook(lua_State *lua, lua_Debug *ar);
+void freeLuaScriptsAsync(dict *lua_scripts);
+void freeFunctionsAsync(functionsLibCtx *lib_ctx);
+int ldbIsEnabled();
+void ldbLog(sds entry);
+void ldbLogRedisReply(char *reply);
+void sha1hex(char *digest, char *script, size_t len);
+unsigned long evalMemory();
+dict* evalScriptsDict();
+unsigned long evalScriptsMemory();
+uint64_t evalGetCommandFlags(client *c, uint64_t orig_flags);
+uint64_t fcallGetCommandFlags(client *c, uint64_t orig_flags);
+int isInsideYieldingLongCommand();
+
+typedef struct luaScript {
+    uint64_t flags;
+    robj *body;
+} luaScript;
+
+/* Blocked clients */
+void processUnblockedClients(void);
+void blockClient(client *c, int btype);
+void unblockClient(client *c);
+void queueClientForReprocessing(client *c);
+void replyToBlockedClientTimedOut(client *c);
+int getTimeoutFromObjectOrReply(client *c, robj *object, mstime_t *timeout, int unit);
+void disconnectAllBlockedClients(void);
+void handleClientsBlockedOnKeys(void);
+void signalKeyAsReady(redisDb *db, robj *key, int type);
+void blockForKeys(client *c, int btype, robj **keys, int numkeys, long count, mstime_t timeout, robj *target, struct blockPos *blockpos, streamID *ids);
+void updateStatsOnUnblock(client *c, long blocked_us, long reply_us, int had_errors);
+void scanDatabaseForDeletedStreams(redisDb *emptied, redisDb *replaced_with);
+
+/* timeout.c -- Blocked clients timeout and connections timeout. */
+void addClientToTimeoutTable(client *c);
+void removeClientFromTimeoutTable(client *c);
+void handleBlockedClientsTimeout(void);
+int clientsCronHandleTimeout(client *c, mstime_t now_ms);
+
+/* expire.c -- Handling of expired keys */
+void activeExpireCycle(int type);
+void expireSlaveKeys(void);
+void rememberSlaveKeyWithExpire(redisDb *db, robj *key);
+void flushSlaveKeysWithExpireList(void);
+size_t getSlaveKeyWithExpireCount(void);
+
+/* evict.c -- maxmemory handling and LRU eviction. */
+void evictionPoolAlloc(void);
+#define LFU_INIT_VAL 5
+unsigned long LFUGetTimeInMinutes(void);
+uint8_t LFULogIncr(uint8_t value);
+unsigned long LFUDecrAndReturn(robj *o);
+#define EVICT_OK 0
+#define EVICT_RUNNING 1
+#define EVICT_FAIL 2
+int performEvictions(void);
+void startEvictionTimeProc(void);
+
+/* Keys hashing / comparison functions for dict.c hash tables. */
+uint64_t dictSdsHash(const void *key);
+uint64_t dictSdsCaseHash(const void *key);
+int dictSdsKeyCompare(dict *d, const void *key1, const void *key2);
+int dictSdsKeyCaseCompare(dict *d, const void *key1, const void *key2);
+void dictSdsDestructor(dict *d, void *val);
+void *dictSdsDup(dict *d, const void *key);
+
+/* Git SHA1 */
+char *redisGitSHA1(void);
+char *redisGitDirty(void);
+uint64_t redisBuildId(void);
+char *redisBuildIdString(void);
+
+/* Commands prototypes */
+void authCommand(client *c);
+void pingCommand(client *c);
+void echoCommand(client *c);
+void commandCommand(client *c);
+void commandCountCommand(client *c);
+void commandListCommand(client *c);
+void commandInfoCommand(client *c);
+void commandGetKeysCommand(client *c);
+void commandGetKeysAndFlagsCommand(client *c);
+void commandHelpCommand(client *c);
+void commandDocsCommand(client *c);
+void setCommand(client *c);
+void setnxCommand(client *c);
+void setexCommand(client *c);
+void psetexCommand(client *c);
+void getCommand(client *c);
+void getexCommand(client *c);
+void getdelCommand(client *c);
+void delCommand(client *c);
+void unlinkCommand(client *c);
+void existsCommand(client *c);
+void setbitCommand(client *c);
+void getbitCommand(client *c);
+void bitfieldCommand(client *c);
+void bitfieldroCommand(client *c);
+void setrangeCommand(client *c);
+void getrangeCommand(client *c);
+void incrCommand(client *c);
+void decrCommand(client *c);
+void incrbyCommand(client *c);
+void decrbyCommand(client *c);
+void incrbyfloatCommand(client *c);
+void selectCommand(client *c);
+void swapdbCommand(client *c);
+void randomkeyCommand(client *c);
+void keysCommand(client *c);
+void scanCommand(client *c);
+void dbsizeCommand(client *c);
+void lastsaveCommand(client *c);
+void saveCommand(client *c);
+void bgsaveCommand(client *c);
+void bgrewriteaofCommand(client *c);
+void shutdownCommand(client *c);
+void slowlogCommand(client *c);
+void moveCommand(client *c);
+void copyCommand(client *c);
+void renameCommand(client *c);
+void renamenxCommand(client *c);
+void lpushCommand(client *c);
+void rpushCommand(client *c);
+void lpushxCommand(client *c);
+void rpushxCommand(client *c);
+void linsertCommand(client *c);
+void lpopCommand(client *c);
+void rpopCommand(client *c);
+void lmpopCommand(client *c);
+void llenCommand(client *c);
+void lindexCommand(client *c);
+void lrangeCommand(client *c);
+void ltrimCommand(client *c);
+void typeCommand(client *c);
+void lsetCommand(client *c);
+void saddCommand(client *c);
+void sremCommand(client *c);
+void smoveCommand(client *c);
+void sismemberCommand(client *c);
+void smismemberCommand(client *c);
+void scardCommand(client *c);
+void spopCommand(client *c);
+void srandmemberCommand(client *c);
+void sinterCommand(client *c);
+void sinterCardCommand(client *c);
+void sinterstoreCommand(client *c);
+void sunionCommand(client *c);
+void sunionstoreCommand(client *c);
+void sdiffCommand(client *c);
+void sdiffstoreCommand(client *c);
+void sscanCommand(client *c);
+void syncCommand(client *c);
+void flushdbCommand(client *c);
+void flushallCommand(client *c);
+void sortCommand(client *c);
+void sortroCommand(client *c);
+void lremCommand(client *c);
+void lposCommand(client *c);
+void rpoplpushCommand(client *c);
+void lmoveCommand(client *c);
+void infoCommand(client *c);
+void mgetCommand(client *c);
+void monitorCommand(client *c);
+void expireCommand(client *c);
+void expireatCommand(client *c);
+void pexpireCommand(client *c);
+void pexpireatCommand(client *c);
+void getsetCommand(client *c);
+void ttlCommand(client *c);
+void touchCommand(client *c);
+void pttlCommand(client *c);
+void expiretimeCommand(client *c);
+void pexpiretimeCommand(client *c);
+void persistCommand(client *c);
+void replicaofCommand(client *c);
+void roleCommand(client *c);
+void debugCommand(client *c);
+void msetCommand(client *c);
+void msetnxCommand(client *c);
+void zaddCommand(client *c);
+void zincrbyCommand(client *c);
+void zrangeCommand(client *c);
+void zrangebyscoreCommand(client *c);
+void zrevrangebyscoreCommand(client *c);
+void zrangebylexCommand(client *c);
+void zrevrangebylexCommand(client *c);
+void zcountCommand(client *c);
+void zlexcountCommand(client *c);
+void zrevrangeCommand(client *c);
+void zcardCommand(client *c);
+void zremCommand(client *c);
+void zscoreCommand(client *c);
+void zmscoreCommand(client *c);
+void zremrangebyscoreCommand(client *c);
+void zremrangebylexCommand(client *c);
+void zpopminCommand(client *c);
+void zpopmaxCommand(client *c);
+void zmpopCommand(client *c);
+void bzpopminCommand(client *c);
+void bzpopmaxCommand(client *c);
+void bzmpopCommand(client *c);
+void zrandmemberCommand(client *c);
+void multiCommand(client *c);
+void execCommand(client *c);
+void discardCommand(client *c);
+void blpopCommand(client *c);
+void brpopCommand(client *c);
+void blmpopCommand(client *c);
+void brpoplpushCommand(client *c);
+void blmoveCommand(client *c);
+void appendCommand(client *c);
+void strlenCommand(client *c);
+void zrankCommand(client *c);
+void zrevrankCommand(client *c);
+void hsetCommand(client *c);
+void hsetnxCommand(client *c);
+void hgetCommand(client *c);
+void hmgetCommand(client *c);
+void hdelCommand(client *c);
+void hlenCommand(client *c);
+void hstrlenCommand(client *c);
+void zremrangebyrankCommand(client *c);
+void zunionstoreCommand(client *c);
+void zinterstoreCommand(client *c);
+void zdiffstoreCommand(client *c);
+void zunionCommand(client *c);
+void zinterCommand(client *c);
+void zinterCardCommand(client *c);
+void zrangestoreCommand(client *c);
+void zdiffCommand(client *c);
+void zscanCommand(client *c);
+void hkeysCommand(client *c);
+void hvalsCommand(client *c);
+void hgetallCommand(client *c);
+void hexistsCommand(client *c);
+void hscanCommand(client *c);
+void hrandfieldCommand(client *c);
+void configSetCommand(client *c);
+void configGetCommand(client *c);
+void configResetStatCommand(client *c);
+void configRewriteCommand(client *c);
+void configHelpCommand(client *c);
+void hincrbyCommand(client *c);
+void hincrbyfloatCommand(client *c);
+void subscribeCommand(client *c);
+void unsubscribeCommand(client *c);
+void psubscribeCommand(client *c);
+void punsubscribeCommand(client *c);
+void publishCommand(client *c);
+void pubsubCommand(client *c);
+void spublishCommand(client *c);
+void ssubscribeCommand(client *c);
+void sunsubscribeCommand(client *c);
+void watchCommand(client *c);
+void unwatchCommand(client *c);
+void clusterCommand(client *c);
+void restoreCommand(client *c);
+void migrateCommand(client *c);
+void askingCommand(client *c);
+void readonlyCommand(client *c);
+void readwriteCommand(client *c);
+int verifyDumpPayload(unsigned char *p, size_t len, uint16_t *rdbver_ptr);
+void dumpCommand(client *c);
+void objectCommand(client *c);
+void memoryCommand(client *c);
+void clientCommand(client *c);
+void helloCommand(client *c);
+void evalCommand(client *c);
+void evalRoCommand(client *c);
+void evalShaCommand(client *c);
+void evalShaRoCommand(client *c);
+void scriptCommand(client *c);
+void fcallCommand(client *c);
+void fcallroCommand(client *c);
+void functionLoadCommand(client *c);
+void functionDeleteCommand(client *c);
+void functionKillCommand(client *c);
+void functionStatsCommand(client *c);
+void functionListCommand(client *c);
+void functionHelpCommand(client *c);
+void functionFlushCommand(client *c);
+void functionRestoreCommand(client *c);
+void functionDumpCommand(client *c);
+void timeCommand(client *c);
+void bitopCommand(client *c);
+void bitcountCommand(client *c);
+void bitposCommand(client *c);
+void replconfCommand(client *c);
+void waitCommand(client *c);
+void georadiusbymemberCommand(client *c);
+void georadiusbymemberroCommand(client *c);
+void georadiusCommand(client *c);
+void georadiusroCommand(client *c);
+void geoaddCommand(client *c);
+void geohashCommand(client *c);
+void geoposCommand(client *c);
+void geodistCommand(client *c);
+void geosearchCommand(client *c);
+void geosearchstoreCommand(client *c);
+void pfselftestCommand(client *c);
+void pfaddCommand(client *c);
+void pfcountCommand(client *c);
+void pfmergeCommand(client *c);
+void pfdebugCommand(client *c);
+void latencyCommand(client *c);
+void moduleCommand(client *c);
+void securityWarningCommand(client *c);
+void xaddCommand(client *c);
+void xrangeCommand(client *c);
+void xrevrangeCommand(client *c);
+void xlenCommand(client *c);
+void xreadCommand(client *c);
+void xgroupCommand(client *c);
+void xsetidCommand(client *c);
+void xackCommand(client *c);
+void xpendingCommand(client *c);
+void xclaimCommand(client *c);
+void xautoclaimCommand(client *c);
+void xinfoCommand(client *c);
+void xdelCommand(client *c);
+void xtrimCommand(client *c);
+void lolwutCommand(client *c);
+void aclCommand(client *c);
+void lcsCommand(client *c);
+void quitCommand(client *c);
+void resetCommand(client *c);
+void failoverCommand(client *c);
+
+#if defined(__GNUC__)
+void *calloc(size_t count, size_t size) __attribute__ ((deprecated));
+void free(void *ptr) __attribute__ ((deprecated));
+void *malloc(size_t size) __attribute__ ((deprecated));
+void *realloc(void *ptr, size_t size) __attribute__ ((deprecated));
+#endif
+
+/* Debugging stuff */
+void _serverAssertWithInfo(const client *c, const robj *o, const char *estr, const char *file, int line);
+void _serverAssert(const char *estr, const char *file, int line);
+#ifdef __GNUC__
+void _serverPanic(const char *file, int line, const char *msg, ...)
+    __attribute__ ((format (printf, 3, 4)));
+#else
+void _serverPanic(const char *file, int line, const char *msg, ...);
+#endif
+void serverLogObjectDebugInfo(const robj *o);
+void sigsegvHandler(int sig, siginfo_t *info, void *secret);
+const char *getSafeInfoString(const char *s, size_t len, char **tmp);
+dict *genInfoSectionDict(robj **argv, int argc, char **defaults, int *out_all, int *out_everything);
+void releaseInfoSectionDict(dict *sec);
+sds genRedisInfoString(dict *section_dict, int all_sections, int everything);
+sds genModulesInfoString(sds info);
+void applyWatchdogPeriod();
+void watchdogScheduleSignal(int period);
+void serverLogHexDump(int level, char *descr, void *value, size_t len);
+int memtest_preserving_test(unsigned long *m, size_t bytes, int passes);
+void mixDigest(unsigned char *digest, const void *ptr, size_t len);
+void xorDigest(unsigned char *digest, const void *ptr, size_t len);
+sds catSubCommandFullname(const char *parent_name, const char *sub_name);
+void commandAddSubcommand(struct redisCommand *parent, struct redisCommand *subcommand, const char *declared_name);
+void debugDelay(int usec);
+void killIOThreads(void);
+void killThreads(void);
+void makeThreadKillable(void);
+void swapMainDbWithTempDb(redisDb *tempDb);
+
+/* Use macro for checking log level to avoid evaluating arguments in cases log
+ * should be ignored due to low level. */
+#define serverLog(level, ...) do {\
+        if (((level)&0xff) < server.verbosity) break;\
+        _serverLog(level, __VA_ARGS__);\
+    } while(0)
+
+/* TLS stuff */
+void tlsInit(void);
+void tlsCleanup(void);
+int tlsConfigure(redisTLSContextConfig *ctx_config);
+int isTlsConfigured(void);
+
+#define redisDebug(fmt, ...) \
+    printf("DEBUG %s:%d > " fmt "\n", __FILE__, __LINE__, __VA_ARGS__)
+#define redisDebugMark() \
+    printf("-- MARK %s:%d --\n", __FILE__, __LINE__)
+
+int iAmMaster(void);
+
+#define STRINGIFY_(x) #x
+#define STRINGIFY(x) STRINGIFY_(x)
+
+#endif