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/*-
* BSD LICENSE
*
* Copyright (c) Intel Corporation.
* 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 Intel Corporation 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 SPDK_INTERNAL_EVENT_H
#define SPDK_INTERNAL_EVENT_H
#include "spdk/stdinc.h"
#ifdef __cplusplus
extern "C" {
#endif
#include "spdk/event.h"
#include "spdk/json.h"
#include "spdk/thread.h"
#include "spdk/util.h"
struct spdk_event {
uint32_t lcore;
spdk_event_fn fn;
void *arg1;
void *arg2;
};
enum spdk_reactor_state {
SPDK_REACTOR_STATE_UNINITIALIZED = 0,
SPDK_REACTOR_STATE_INITIALIZED = 1,
SPDK_REACTOR_STATE_RUNNING = 2,
SPDK_REACTOR_STATE_EXITING = 3,
SPDK_REACTOR_STATE_SHUTDOWN = 4,
};
struct spdk_lw_thread {
TAILQ_ENTRY(spdk_lw_thread) link;
bool resched;
uint64_t tsc_start;
};
struct spdk_reactor {
/* Lightweight threads running on this reactor */
TAILQ_HEAD(, spdk_lw_thread) threads;
uint32_t thread_count;
/* Logical core number for this reactor. */
uint32_t lcore;
struct {
uint32_t is_valid : 1;
uint32_t reserved : 31;
} flags;
uint64_t tsc_last;
struct spdk_ring *events;
/* The last known rusage values */
struct rusage rusage;
uint64_t last_rusage;
uint64_t busy_tsc;
uint64_t idle_tsc;
} __attribute__((aligned(SPDK_CACHE_LINE_SIZE)));
int spdk_reactors_init(void);
void spdk_reactors_fini(void);
void spdk_reactors_start(void);
void spdk_reactors_stop(void *arg1);
struct spdk_reactor *spdk_reactor_get(uint32_t lcore);
/**
* Allocate and pass an event to each reactor, serially.
*
* The allocated event is processed asynchronously - i.e. spdk_for_each_reactor
* will return prior to `fn` being called on each reactor.
*
* \param fn This is the function that will be called on each reactor.
* \param arg1 Argument will be passed to fn when called.
* \param arg2 Argument will be passed to fn when called.
* \param cpl This will be called on the originating reactor after `fn` has been
* called on each reactor.
*/
void spdk_for_each_reactor(spdk_event_fn fn, void *arg1, void *arg2, spdk_event_fn cpl);
struct spdk_subsystem {
const char *name;
/* User must call spdk_subsystem_init_next() when they are done with their initialization. */
void (*init)(void);
void (*fini)(void);
void (*config)(FILE *fp);
/**
* Write JSON configuration handler.
*
* \param w JSON write context
*/
void (*write_config_json)(struct spdk_json_write_ctx *w);
TAILQ_ENTRY(spdk_subsystem) tailq;
};
struct spdk_subsystem *spdk_subsystem_find(const char *name);
struct spdk_subsystem *spdk_subsystem_get_first(void);
struct spdk_subsystem *spdk_subsystem_get_next(struct spdk_subsystem *cur_subsystem);
struct spdk_subsystem_depend {
const char *name;
const char *depends_on;
TAILQ_ENTRY(spdk_subsystem_depend) tailq;
};
struct spdk_subsystem_depend *spdk_subsystem_get_first_depend(void);
struct spdk_subsystem_depend *spdk_subsystem_get_next_depend(struct spdk_subsystem_depend
*cur_depend);
void spdk_add_subsystem(struct spdk_subsystem *subsystem);
void spdk_add_subsystem_depend(struct spdk_subsystem_depend *depend);
typedef void (*spdk_subsystem_init_fn)(int rc, void *ctx);
void spdk_subsystem_init(spdk_subsystem_init_fn cb_fn, void *cb_arg);
void spdk_subsystem_fini(spdk_msg_fn cb_fn, void *cb_arg);
void spdk_subsystem_init_next(int rc);
void spdk_subsystem_fini_next(void);
void spdk_subsystem_config(FILE *fp);
void spdk_app_json_config_load(const char *json_config_file, const char *rpc_addr,
spdk_subsystem_init_fn cb_fn, void *cb_arg,
bool stop_on_error);
/**
* Save pointed \c subsystem configuration to the JSON write context \c w. In case of
* error \c null is written to the JSON context.
*
* \param w JSON write context
* \param subsystem the subsystem to query
*/
void spdk_subsystem_config_json(struct spdk_json_write_ctx *w, struct spdk_subsystem *subsystem);
void spdk_rpc_initialize(const char *listen_addr);
void spdk_rpc_finish(void);
/**
* \brief Register a new subsystem
*/
#define SPDK_SUBSYSTEM_REGISTER(_name) \
__attribute__((constructor)) static void _name ## _register(void) \
{ \
spdk_add_subsystem(&_name); \
}
/**
* \brief Declare that a subsystem depends on another subsystem.
*/
#define SPDK_SUBSYSTEM_DEPEND(_name, _depends_on) \
static struct spdk_subsystem_depend __subsystem_ ## _name ## _depend_on ## _depends_on = { \
.name = #_name, \
.depends_on = #_depends_on, \
}; \
__attribute__((constructor)) static void _name ## _depend_on ## _depends_on(void) \
{ \
spdk_add_subsystem_depend(&__subsystem_ ## _name ## _depend_on ## _depends_on); \
}
#ifdef __cplusplus
}
#endif
#endif /* SPDK_INTERNAL_EVENT_H */
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