/
ioengines.h
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/
ioengines.h
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#ifndef FIO_IOENGINE_H
#define FIO_IOENGINE_H
#include <stddef.h>
#include "compiler/compiler.h"
#include "flist.h"
#include "io_u.h"
#include "zbd_types.h"
#define FIO_IOOPS_VERSION 31
#ifndef CONFIG_DYNAMIC_ENGINES
#define FIO_STATIC static
#else
#define FIO_STATIC
#endif
/*
* io_ops->queue() return values
*/
enum fio_q_status {
FIO_Q_COMPLETED = 0, /* completed sync */
FIO_Q_QUEUED = 1, /* queued, will complete async */
FIO_Q_BUSY = 2, /* no more room, call ->commit() */
};
struct ioengine_ops {
struct flist_head list;
const char *name;
int version;
int flags;
void *dlhandle;
int (*setup)(struct thread_data *);
int (*init)(struct thread_data *);
int (*post_init)(struct thread_data *);
int (*prep)(struct thread_data *, struct io_u *);
enum fio_q_status (*queue)(struct thread_data *, struct io_u *);
int (*commit)(struct thread_data *);
int (*getevents)(struct thread_data *, unsigned int, unsigned int, const struct timespec *);
struct io_u *(*event)(struct thread_data *, int);
char *(*errdetails)(struct io_u *);
int (*cancel)(struct thread_data *, struct io_u *);
void (*cleanup)(struct thread_data *);
int (*open_file)(struct thread_data *, struct fio_file *);
int (*close_file)(struct thread_data *, struct fio_file *);
int (*invalidate)(struct thread_data *, struct fio_file *);
int (*unlink_file)(struct thread_data *, struct fio_file *);
int (*get_file_size)(struct thread_data *, struct fio_file *);
int (*prepopulate_file)(struct thread_data *, struct fio_file *);
void (*terminate)(struct thread_data *);
int (*iomem_alloc)(struct thread_data *, size_t);
void (*iomem_free)(struct thread_data *);
int (*io_u_init)(struct thread_data *, struct io_u *);
void (*io_u_free)(struct thread_data *, struct io_u *);
int (*get_zoned_model)(struct thread_data *td,
struct fio_file *f, enum zbd_zoned_model *);
int (*report_zones)(struct thread_data *, struct fio_file *,
uint64_t, struct zbd_zone *, unsigned int);
int (*reset_wp)(struct thread_data *, struct fio_file *,
uint64_t, uint64_t);
int (*get_max_open_zones)(struct thread_data *, struct fio_file *,
unsigned int *);
int (*finish_zone)(struct thread_data *, struct fio_file *,
uint64_t, uint64_t);
int option_struct_size;
struct fio_option *options;
};
enum fio_ioengine_flags {
FIO_SYNCIO = 1 << 0, /* io engine has synchronous ->queue */
FIO_RAWIO = 1 << 1, /* some sort of direct/raw io */
FIO_DISKLESSIO = 1 << 2, /* no disk involved */
FIO_NOEXTEND = 1 << 3, /* engine can't extend file */
FIO_NODISKUTIL = 1 << 4, /* diskutil can't handle filename */
FIO_UNIDIR = 1 << 5, /* engine is uni-directional */
FIO_NOIO = 1 << 6, /* thread does only pseudo IO */
FIO_PIPEIO = 1 << 7, /* input/output no seekable */
FIO_BARRIER = 1 << 8, /* engine supports barriers */
FIO_MEMALIGN = 1 << 9, /* engine wants aligned memory */
FIO_BIT_BASED = 1 << 10, /* engine uses a bit base (e.g. uses Kbit as opposed to KB) */
FIO_FAKEIO = 1 << 11, /* engine pretends to do IO */
FIO_NOSTATS = 1 << 12, /* don't do IO stats */
FIO_NOFILEHASH = 1 << 13, /* doesn't hash the files for lookup later. */
FIO_ASYNCIO_SYNC_TRIM
= 1 << 14, /* io engine has async ->queue except for trim */
FIO_NO_OFFLOAD = 1 << 15, /* no async offload */
FIO_ASYNCIO_SETS_ISSUE_TIME
= 1 << 16, /* async ioengine with commit function that sets issue_time */
FIO_SKIPPABLE_IOMEM_ALLOC
= 1 << 17, /* skip iomem_alloc & iomem_free if job sets mem/iomem */
FIO_RO_NEEDS_RW_OPEN
= 1 << 18, /* open files in rw mode even if we have a read job; only
affects ioengines using generic_open_file */
};
/*
* External engine defined symbol to fill in the engine ops structure
*/
typedef void (*get_ioengine_t)(struct ioengine_ops **);
/*
* io engine entry points
*/
extern int __must_check td_io_init(struct thread_data *);
extern int __must_check td_io_prep(struct thread_data *, struct io_u *);
extern enum fio_q_status __must_check td_io_queue(struct thread_data *, struct io_u *);
extern int __must_check td_io_getevents(struct thread_data *, unsigned int, unsigned int, const struct timespec *);
extern void td_io_commit(struct thread_data *);
extern int __must_check td_io_open_file(struct thread_data *, struct fio_file *);
extern int td_io_close_file(struct thread_data *, struct fio_file *);
extern int td_io_unlink_file(struct thread_data *, struct fio_file *);
extern int __must_check td_io_get_file_size(struct thread_data *, struct fio_file *);
extern struct ioengine_ops *load_ioengine(struct thread_data *);
extern void register_ioengine(struct ioengine_ops *);
extern void unregister_ioengine(struct ioengine_ops *);
extern void free_ioengine(struct thread_data *);
extern void close_ioengine(struct thread_data *);
extern int fio_show_ioengine_help(const char *engine);
#endif