blob: f5cb04838a31f70dc6cf801239e33df16800f54c [file] [log] [blame]
/*
* windowsaio engine
*
* IO engine using Windows IO Completion Ports.
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <signal.h>
#include <errno.h>
#include "../fio.h"
typedef BOOL (WINAPI *CANCELIOEX)(HANDLE hFile, LPOVERLAPPED lpOverlapped);
int geterrno_from_win_error (DWORD code, int deferrno);
struct fio_overlapped {
OVERLAPPED o;
struct io_u *io_u;
BOOL io_complete;
};
struct windowsaio_data {
struct io_u **aio_events;
HANDLE iocp;
HANDLE iothread;
HANDLE iocomplete_event;
BOOL iothread_running;
};
struct thread_ctx {
HANDLE iocp;
struct windowsaio_data *wd;
};
static BOOL timeout_expired(DWORD start_count, DWORD end_count);
static int fio_windowsaio_getevents(struct thread_data *td, unsigned int min,
unsigned int max, const struct timespec *t);
static struct io_u *fio_windowsaio_event(struct thread_data *td, int event);
static int fio_windowsaio_queue(struct thread_data *td,
struct io_u *io_u);
static void fio_windowsaio_cleanup(struct thread_data *td);
static DWORD WINAPI IoCompletionRoutine(LPVOID lpParameter);
static int fio_windowsaio_init(struct thread_data *td);
static int fio_windowsaio_open_file(struct thread_data *td, struct fio_file *f);
static int fio_windowsaio_close_file(struct thread_data fio_unused *td, struct fio_file *f);
static int fio_windowsaio_init(struct thread_data *td)
{
struct windowsaio_data *wd;
int rc = 0;
wd = calloc(1, sizeof(struct windowsaio_data));
if (wd == NULL) {
log_err("windowsaio: failed to allocate memory for engine data\n");
rc = 1;
}
if (!rc) {
wd->aio_events = malloc(td->o.iodepth * sizeof(struct io_u*));
if (wd->aio_events == NULL) {
log_err("windowsaio: failed to allocate memory for aio events list\n");
rc = 1;
}
}
if (!rc) {
/* Create an auto-reset event */
wd->iocomplete_event = CreateEvent(NULL, FALSE, FALSE, NULL);
if (wd->iocomplete_event == NULL) {
log_err("windowsaio: failed to create io complete event handle\n");
rc = 1;
}
}
if (rc) {
if (wd != NULL) {
if (wd->aio_events != NULL)
free(wd->aio_events);
free(wd);
}
}
td->io_ops_data = wd;
if (!rc) {
struct thread_ctx *ctx;
struct windowsaio_data *wd;
HANDLE hFile;
hFile = CreateIoCompletionPort(INVALID_HANDLE_VALUE, NULL, 0, 0);
if (hFile == INVALID_HANDLE_VALUE) {
log_err("windowsaio: failed to create io completion port\n");
rc = 1;
}
wd = td->io_ops_data;
wd->iothread_running = TRUE;
wd->iocp = hFile;
if (!rc)
ctx = malloc(sizeof(struct thread_ctx));
if (!rc && ctx == NULL)
{
log_err("windowsaio: failed to allocate memory for thread context structure\n");
CloseHandle(hFile);
rc = 1;
}
if (!rc)
{
DWORD threadid;
ctx->iocp = hFile;
ctx->wd = wd;
wd->iothread = CreateThread(NULL, 0, IoCompletionRoutine, ctx, 0, &threadid);
if (wd->iothread != NULL)
fio_setaffinity(threadid, td->o.cpumask);
else
log_err("windowsaio: failed to create io completion thread\n");
}
if (rc || wd->iothread == NULL)
rc = 1;
}
return rc;
}
static void fio_windowsaio_cleanup(struct thread_data *td)
{
struct windowsaio_data *wd;
wd = td->io_ops_data;
if (wd != NULL) {
wd->iothread_running = FALSE;
WaitForSingleObject(wd->iothread, INFINITE);
CloseHandle(wd->iothread);
CloseHandle(wd->iocomplete_event);
free(wd->aio_events);
free(wd);
td->io_ops_data = NULL;
}
}
static int fio_windowsaio_open_file(struct thread_data *td, struct fio_file *f)
{
int rc = 0;
DWORD flags = FILE_FLAG_POSIX_SEMANTICS | FILE_FLAG_OVERLAPPED;
DWORD sharemode = FILE_SHARE_READ | FILE_SHARE_WRITE;
DWORD openmode = OPEN_ALWAYS;
DWORD access;
dprint(FD_FILE, "fd open %s\n", f->file_name);
if (f->filetype == FIO_TYPE_PIPE) {
log_err("windowsaio: pipes are not supported\n");
return 1;
}
if (!strcmp(f->file_name, "-")) {
log_err("windowsaio: can't read/write to stdin/out\n");
return 1;
}
if (td->o.odirect)
flags |= FILE_FLAG_NO_BUFFERING;
if (td->o.sync_io)
flags |= FILE_FLAG_WRITE_THROUGH;
/*
* Inform Windows whether we're going to be doing sequential or
* random io so it can tune the Cache Manager
*/
if (td->o.td_ddir == TD_DDIR_READ ||
td->o.td_ddir == TD_DDIR_WRITE)
flags |= FILE_FLAG_SEQUENTIAL_SCAN;
else
flags |= FILE_FLAG_RANDOM_ACCESS;
if (!td_write(td) || read_only)
access = GENERIC_READ;
else
access = (GENERIC_READ | GENERIC_WRITE);
if (td->o.create_on_open)
openmode = OPEN_ALWAYS;
else
openmode = OPEN_EXISTING;
f->hFile = CreateFile(f->file_name, access, sharemode,
NULL, openmode, flags, NULL);
if (f->hFile == INVALID_HANDLE_VALUE) {
log_err("windowsaio: failed to open file \"%s\"\n", f->file_name);
rc = 1;
}
/* Only set up the completion port and thread if we're not just
* querying the device size */
if (!rc && td->io_ops_data != NULL) {
struct windowsaio_data *wd;
wd = td->io_ops_data;
if (CreateIoCompletionPort(f->hFile, wd->iocp, 0, 0) == NULL) {
log_err("windowsaio: failed to create io completion port\n");
rc = 1;
}
}
return rc;
}
static int fio_windowsaio_close_file(struct thread_data fio_unused *td, struct fio_file *f)
{
int rc = 0;
dprint(FD_FILE, "fd close %s\n", f->file_name);
if (f->hFile != INVALID_HANDLE_VALUE) {
if (!CloseHandle(f->hFile)) {
log_info("windowsaio: failed to close file handle for \"%s\"\n", f->file_name);
rc = 1;
}
}
f->hFile = INVALID_HANDLE_VALUE;
return rc;
}
static BOOL timeout_expired(DWORD start_count, DWORD end_count)
{
BOOL expired = FALSE;
DWORD current_time;
current_time = GetTickCount();
if ((end_count > start_count) && current_time >= end_count)
expired = TRUE;
else if (current_time < start_count && current_time > end_count)
expired = TRUE;
return expired;
}
static struct io_u* fio_windowsaio_event(struct thread_data *td, int event)
{
struct windowsaio_data *wd = td->io_ops_data;
return wd->aio_events[event];
}
static int fio_windowsaio_getevents(struct thread_data *td, unsigned int min,
unsigned int max,
const struct timespec *t)
{
struct windowsaio_data *wd = td->io_ops_data;
unsigned int dequeued = 0;
struct io_u *io_u;
int i;
struct fio_overlapped *fov;
DWORD start_count = 0;
DWORD end_count = 0;
DWORD status;
DWORD mswait = 250;
if (t != NULL) {
mswait = (t->tv_sec * 1000) + (t->tv_nsec / 1000000);
start_count = GetTickCount();
end_count = start_count + (t->tv_sec * 1000) + (t->tv_nsec / 1000000);
}
do {
io_u_qiter(&td->io_u_all, io_u, i) {
if (!(io_u->flags & IO_U_F_FLIGHT))
continue;
fov = (struct fio_overlapped*)io_u->engine_data;
if (fov->io_complete) {
fov->io_complete = FALSE;
wd->aio_events[dequeued] = io_u;
dequeued++;
}
}
if (dequeued >= min)
break;
if (dequeued < min) {
status = WaitForSingleObject(wd->iocomplete_event, mswait);
if (status != WAIT_OBJECT_0 && dequeued >= min)
break;
}
if (dequeued >= min || (t != NULL && timeout_expired(start_count, end_count)))
break;
} while (1);
return dequeued;
}
static int fio_windowsaio_queue(struct thread_data *td, struct io_u *io_u)
{
struct fio_overlapped *o = io_u->engine_data;
LPOVERLAPPED lpOvl = &o->o;
BOOL success = FALSE;
int rc = FIO_Q_COMPLETED;
fio_ro_check(td, io_u);
lpOvl->Internal = 0;
lpOvl->InternalHigh = 0;
lpOvl->Offset = io_u->offset & 0xFFFFFFFF;
lpOvl->OffsetHigh = io_u->offset >> 32;
switch (io_u->ddir) {
case DDIR_WRITE:
success = WriteFile(io_u->file->hFile, io_u->xfer_buf, io_u->xfer_buflen, NULL, lpOvl);
break;
case DDIR_READ:
success = ReadFile(io_u->file->hFile, io_u->xfer_buf, io_u->xfer_buflen, NULL, lpOvl);
break;
case DDIR_SYNC:
case DDIR_DATASYNC:
case DDIR_SYNC_FILE_RANGE:
success = FlushFileBuffers(io_u->file->hFile);
if (!success) {
log_err("windowsaio: failed to flush file buffers\n");
io_u->error = win_to_posix_error(GetLastError());
}
return FIO_Q_COMPLETED;
break;
case DDIR_TRIM:
log_err("windowsaio: manual TRIM isn't supported on Windows\n");
io_u->error = 1;
io_u->resid = io_u->xfer_buflen;
return FIO_Q_COMPLETED;
break;
default:
assert(0);
break;
}
if (success || GetLastError() == ERROR_IO_PENDING)
rc = FIO_Q_QUEUED;
else {
io_u->error = win_to_posix_error(GetLastError());
io_u->resid = io_u->xfer_buflen;
}
return rc;
}
/* Runs as a thread and waits for queued IO to complete */
static DWORD WINAPI IoCompletionRoutine(LPVOID lpParameter)
{
OVERLAPPED *ovl;
struct fio_overlapped *fov;
struct io_u *io_u;
struct windowsaio_data *wd;
struct thread_ctx *ctx;
ULONG_PTR ulKey = 0;
DWORD bytes;
ctx = (struct thread_ctx*)lpParameter;
wd = ctx->wd;
do {
if (!GetQueuedCompletionStatus(ctx->iocp, &bytes, &ulKey, &ovl, 250) && ovl == NULL)
continue;
fov = CONTAINING_RECORD(ovl, struct fio_overlapped, o);
io_u = fov->io_u;
if (ovl->Internal == ERROR_SUCCESS) {
io_u->resid = io_u->xfer_buflen - ovl->InternalHigh;
io_u->error = 0;
} else {
io_u->resid = io_u->xfer_buflen;
io_u->error = win_to_posix_error(GetLastError());
}
fov->io_complete = TRUE;
SetEvent(wd->iocomplete_event);
} while (ctx->wd->iothread_running);
CloseHandle(ctx->iocp);
free(ctx);
return 0;
}
static void fio_windowsaio_io_u_free(struct thread_data *td, struct io_u *io_u)
{
struct fio_overlapped *o = io_u->engine_data;
if (o) {
io_u->engine_data = NULL;
free(o);
}
}
static int fio_windowsaio_io_u_init(struct thread_data *td, struct io_u *io_u)
{
struct fio_overlapped *o;
o = malloc(sizeof(*o));
o->io_complete = FALSE;
o->io_u = io_u;
o->o.hEvent = NULL;
io_u->engine_data = o;
return 0;
}
static struct ioengine_ops ioengine = {
.name = "windowsaio",
.version = FIO_IOOPS_VERSION,
.init = fio_windowsaio_init,
.queue = fio_windowsaio_queue,
.getevents = fio_windowsaio_getevents,
.event = fio_windowsaio_event,
.cleanup = fio_windowsaio_cleanup,
.open_file = fio_windowsaio_open_file,
.close_file = fio_windowsaio_close_file,
.get_file_size = generic_get_file_size,
.io_u_init = fio_windowsaio_io_u_init,
.io_u_free = fio_windowsaio_io_u_free,
};
static void fio_init fio_windowsaio_register(void)
{
register_ioengine(&ioengine);
}
static void fio_exit fio_windowsaio_unregister(void)
{
unregister_ioengine(&ioengine);
}