pipeline.h File Reference

Redis asynchronous command pipelining. More...

#include <freeradius-devel/server/connection.h>
#include <freeradius-devel/server/request.h>
#include <freeradius-devel/server/trunk.h>
#include <freeradius-devel/redis/io.h>
#include <hiredis/async.h>

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Typedefs
typedef struct fr_redis_cluster_thread_s	fr_redis_cluster_thread_t
typedef void(*	fr_redis_command_set_complete_t) (request_t *request, fr_dlist_head_t *completed, void *rctx)
	Do something meaningful with the replies to the commands previously issued. More...
typedef void(*	fr_redis_command_set_fail_t) (request_t *request, fr_dlist_head_t *completed, void *rctx)
	Write a failure result to the rctx so that the module is aware that the request failed. More...
typedef struct fr_redis_command_set_s	fr_redis_command_set_t
typedef struct fr_redis_command_s	fr_redis_command_t
typedef struct fr_redis_trunk_s	fr_redis_trunk_t

Enumerations
enum	fr_redis_pipeline_status_t {   FR_REDIS_PIPELINE_OK = 0 ,   FR_REDIS_PIPELINE_BAD_CMDS ,   FR_REDIS_PIPELINE_DST_UNAVAILABLE ,   FR_REDIS_PIPELINE_TOO_MANY_REDIRECTS ,   FR_REDIS_PIPELINE_FAIL }

Functions
fr_redis_cluster_thread_t *	fr_redis_cluster_thread_alloc (TALLOC_CTX *ctx, fr_event_list_t *el, fr_trunk_conf_t const *tconf)
	Allocate per-thread, per-cluster instance. More...
redisReply *	fr_redis_command_get_result (fr_redis_command_t *cmd)
fr_redis_pipeline_status_t	fr_redis_command_preformatted_add (fr_redis_command_set_t *cmds, char const *cmd_str, size_t cmd_len)
	Add a preformatted/expanded command to the command set. More...
fr_redis_command_set_t *	fr_redis_command_set_alloc (TALLOC_CTX *ctx, request_t *request, fr_redis_command_set_complete_t complete, fr_redis_command_set_fail_t fail, void *rctx)
	Allocate a new command set. More...
fr_redis_trunk_t *	fr_redis_trunk_alloc (fr_redis_cluster_thread_t *rtcluster, fr_redis_io_conf_t const *conf)
	Allocate a new trunk. More...
fr_redis_pipeline_status_t	redis_command_set_enqueue (fr_redis_trunk_t *rtrunk, fr_redis_command_set_t *cmds)
	Enqueue a command set on a specific trunk. More...

Detailed Description

Redis asynchronous command pipelining.

Id

c7ea3b0460ce9b5043859bdcd3fd7becda4cc42a

Copyright

2019 The FreeRADIUS server project

2019 Network RADIUS SAS (legal.nosp@m.@net.nosp@m.workr.nosp@m.adiu.nosp@m.s.com)

Author

Arran Cudbard-Bell (a.cud.nosp@m.bard.nosp@m.b@fre.nosp@m.erad.nosp@m.ius.o.nosp@m.rg)

Definition in file pipeline.h.

Typedef Documentation

fr_redis_cluster_thread_t

typedef struct fr_redis_cluster_thread_s fr_redis_cluster_thread_t

Definition at line 1 of file pipeline.h.

fr_redis_command_set_complete_t

typedef void(* fr_redis_command_set_complete_t) (request_t *request, fr_dlist_head_t *completed, void *rctx)

Do something meaningful with the replies to the commands previously issued.

Should mark the request as runnable, if there's a request.

Definition at line 58 of file pipeline.h.

fr_redis_command_set_fail_t

typedef void(* fr_redis_command_set_fail_t) (request_t *request, fr_dlist_head_t *completed, void *rctx)

Write a failure result to the rctx so that the module is aware that the request failed.

Should mark the request as runnable, if there's a request.

Definition at line 64 of file pipeline.h.

fr_redis_command_set_t

typedef struct fr_redis_command_set_s fr_redis_command_set_t

Definition at line 1 of file pipeline.h.

fr_redis_command_t

typedef struct fr_redis_command_s fr_redis_command_t

Definition at line 1 of file pipeline.h.

fr_redis_trunk_t

typedef struct fr_redis_trunk_s fr_redis_trunk_t

Definition at line 1 of file pipeline.h.

Enumeration Type Documentation

fr_redis_pipeline_status_t

enum fr_redis_pipeline_status_t

Enumerator
FR_REDIS_PIPELINE_OK	No failure.
FR_REDIS_PIPELINE_BAD_CMDS	Malformed command set.
FR_REDIS_PIPELINE_DST_UNAVAILABLE	Cluster or host is down.
FR_REDIS_PIPELINE_TOO_MANY_REDIRECTS	Redirected too many times.
FR_REDIS_PIPELINE_FAIL	Generic failure.

Definition at line 41 of file pipeline.h.

Function Documentation

fr_redis_cluster_thread_alloc()

fr_redis_cluster_thread_t* fr_redis_cluster_thread_alloc	(	TALLOC_CTX *	ctx,
		fr_event_list_t *	el,
		fr_trunk_conf_t const *	tconf
	)

Allocate per-thread, per-cluster instance.

This structure represents all the connections for a given thread for a given cluster. The structures holds the trunk connections to talk to each cluster member.

Definition at line 647 of file pipeline.c.

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fr_redis_command_get_result()

redisReply* fr_redis_command_get_result

(

fr_redis_command_t *

cmd

)

Definition at line 270 of file pipeline.c.

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fr_redis_command_preformatted_add()

fr_redis_pipeline_status_t fr_redis_command_preformatted_add	(	fr_redis_command_set_t *	cmds,
		char const *	cmd_str,
		size_t	cmd_len
	)

Add a preformatted/expanded command to the command set.

The command must either be entirely static, or parented by the command set.

Note

Caller should disallow "SUBSCRIBE" et al, if they're not appropriate. As subscribing to a stream where we're not expecting it would break things, badly.

Parameters

[in]	cmds	Command set to add command to.
[in]	cmd_str	A fully expanded/formatted command to send to redis. Must be static, or have the same lifetime as the command set (allocated with the command set as the parent).
[in]	cmd_len	Length of the command.

Returns

• FR_REDIS_PIPELINE_BAD_CMDS if a bad command sequence is enqueued.
• FR_REDIS_PIPELINE_OK if command was enqueued successfully.

Definition at line 292 of file pipeline.c.

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fr_redis_command_set_alloc()

fr_redis_command_set_t* fr_redis_command_set_alloc	(	TALLOC_CTX *	ctx,
		request_t *	request,
		fr_redis_command_set_complete_t	complete,
		fr_redis_command_set_fail_t	fail,
		void *	rctx
	)

Allocate a new command set.

This is a set of commands that the calling module wants to execute on the redis server in sequence.

Control will be returned to the caller via the registered complete and fail functions.

Parameters

[in]	ctx	to bind the command set's lifetime to.
[in]	request	to pass to places that need it.
[in]	complete	Function to call when all commands have been processed.
[in]	fail	Function to call if the command set was not executed or was partially executed.
[in]	rctx	Resume context to pass to complete and fail functions.

Returns

A new or refurbished command set.

Definition at line 206 of file pipeline.c.

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fr_redis_trunk_alloc()

fr_redis_trunk_t* fr_redis_trunk_alloc	(	fr_redis_cluster_thread_t *	cluster_thread,
		fr_redis_io_conf_t const *	io_conf
	)

Allocate a new trunk.

Parameters

[in]	cluster_thread	to allocate the trunk for.
[in]	io_conf	Describing the connection to a single REDIS host.

Returns

• On success, a new fr_redis_trunk_t which can be used for pipelining commands.
• NULL on failure.

Definition at line 615 of file pipeline.c.

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redis_command_set_enqueue()

fr_redis_pipeline_status_t redis_command_set_enqueue	(	fr_redis_trunk_t *	rtrunk,
		fr_redis_command_set_t *	cmds
	)

Enqueue a command set on a specific trunk.

The command set may be passed around several trunks before it is complete. This is to allow it to follow MOVED and ASK responses.

Parameters

[in]	rtrunk	to enqueue command set on.
[in]	cmds	Command set to enqueue.

Returns

• FR_REDIS_PIPELINE_OK if commands were immediately enqueued or placed in the backlog.
• FR_REDIS_PIPELINE_DST_UNAVAILABLE if the REDIS host is unreachable.
• FR_REDIS_PIPELINE_FAIL any other general error.

Definition at line 392 of file pipeline.c.

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