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/*
* Copyright (c) 2009-2021, Redis Ltd.
* 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 __SCRIPT_H_
#define __SCRIPT_H_
/*
* Script.c unit provides an API for functions and eval
* to interact with Redis. Interaction includes mostly
* executing commands, but also functionalities like calling
* Redis back on long scripts or check if the script was killed.
*
* The interaction is done using a scriptRunCtx object that
* need to be created by the user and initialized using scriptPrepareForRun.
*
* Detailed list of functionalities expose by the unit:
* 1. Calling commands (including all the validation checks such as
* acl, cluster, read only run, ...)
* 2. Set Resp
* 3. Set Replication method (AOF/REPLICATION/NONE)
* 4. Call Redis back to on long running scripts to allow Redis reply
* to clients and perform script kill
*/
/*
* scriptInterrupt function will return one of those value,
*
* - SCRIPT_KILL - kill the current running script.
* - SCRIPT_CONTINUE - keep running the current script.
*/
#define SCRIPT_KILL 1
#define SCRIPT_CONTINUE 2
/* runCtx flags */
#define SCRIPT_WRITE_DIRTY (1ULL<<0) /* indicate that the current script already performed a write command */
#define SCRIPT_TIMEDOUT (1ULL<<3) /* indicate that the current script timedout */
#define SCRIPT_KILLED (1ULL<<4) /* indicate that the current script was marked to be killed */
#define SCRIPT_READ_ONLY (1ULL<<5) /* indicate that the current script should only perform read commands */
#define SCRIPT_ALLOW_OOM (1ULL<<6) /* indicate to allow any command even if OOM reached */
#define SCRIPT_EVAL_MODE (1ULL<<7) /* Indicate that the current script called from legacy Lua */
#define SCRIPT_ALLOW_CROSS_SLOT (1ULL<<8) /* Indicate that the current script may access keys from multiple slots */
typedef struct scriptRunCtx scriptRunCtx;
struct scriptRunCtx {
const char *funcname;
client *c;
client *original_client;
int flags;
int repl_flags;
monotime start_time;
mstime_t snapshot_time;
};
/* Scripts flags */
#define SCRIPT_FLAG_NO_WRITES (1ULL<<0)
#define SCRIPT_FLAG_ALLOW_OOM (1ULL<<1)
#define SCRIPT_FLAG_ALLOW_STALE (1ULL<<2)
#define SCRIPT_FLAG_NO_CLUSTER (1ULL<<3)
#define SCRIPT_FLAG_EVAL_COMPAT_MODE (1ULL<<4) /* EVAL Script backwards compatible behavior, no shebang provided */
#define SCRIPT_FLAG_ALLOW_CROSS_SLOT (1ULL<<5)
/* Defines a script flags */
typedef struct scriptFlag {
uint64_t flag;
const char *str;
} scriptFlag;
extern scriptFlag scripts_flags_def[];
uint64_t scriptFlagsToCmdFlags(uint64_t cmd_flags, uint64_t script_flags);
int scriptPrepareForRun(scriptRunCtx *r_ctx, client *engine_client, client *caller, const char *funcname, uint64_t script_flags, int ro);
void scriptResetRun(scriptRunCtx *r_ctx);
int scriptSetResp(scriptRunCtx *r_ctx, int resp);
int scriptSetRepl(scriptRunCtx *r_ctx, int repl);
void scriptCall(scriptRunCtx *r_ctx, sds *err);
int scriptInterrupt(scriptRunCtx *r_ctx);
void scriptKill(client *c, int is_eval);
int scriptIsRunning();
const char* scriptCurrFunction();
int scriptIsEval();
int scriptIsTimedout();
client* scriptGetClient();
client* scriptGetCaller();
mstime_t scriptTimeSnapshot();
long long scriptRunDuration();
#endif /* __SCRIPT_H_ */
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