| /* |
| * Native Windows async IO engine |
| * Copyright (C) 2012 Bruce Cran <bruce@cran.org.uk> |
| */ |
| |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <unistd.h> |
| #include <signal.h> |
| #include <errno.h> |
| #include <windows.h> |
| |
| #include "../fio.h" |
| |
| typedef BOOL (WINAPI *CANCELIOEX)(HANDLE hFile, LPOVERLAPPED lpOverlapped); |
| |
| struct fio_overlapped { |
| OVERLAPPED o; |
| struct io_u *io_u; |
| BOOL io_complete; |
| BOOL io_free; |
| }; |
| |
| struct windowsaio_data { |
| struct fio_overlapped *ovls; |
| struct io_u **aio_events; |
| HANDLE iothread; |
| HANDLE iocomplete_event; |
| CANCELIOEX pCancelIoEx; |
| BOOL iothread_running; |
| }; |
| |
| struct thread_ctx { |
| HANDLE iocp; |
| struct windowsaio_data *wd; |
| }; |
| |
| static int fio_windowsaio_cancel(struct thread_data *td, |
| struct io_u *io_u); |
| 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, 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); |
| |
| int sync_file_range(int fd, off64_t offset, off64_t nbytes, |
| unsigned int flags) |
| { |
| errno = ENOSYS; |
| return -1; |
| } |
| |
| static int fio_windowsaio_init(struct thread_data *td) |
| { |
| struct windowsaio_data *wd; |
| HANDLE hKernel32Dll; |
| int rc = 0; |
| int i; |
| |
| wd = malloc(sizeof(struct windowsaio_data)); |
| if (wd != NULL) |
| ZeroMemory(wd, sizeof(struct windowsaio_data)); |
| else |
| rc = 1; |
| |
| if (!rc) { |
| wd->aio_events = malloc(td->o.iodepth * sizeof(struct io_u*)); |
| if (wd->aio_events == NULL) |
| rc = 1; |
| } |
| |
| if (!rc) { |
| wd->ovls = malloc(td->o.iodepth * sizeof(struct fio_overlapped)); |
| if (wd->ovls == NULL) |
| rc = 1; |
| } |
| |
| if (!rc) { |
| for (i = 0; i < td->o.iodepth; i++) { |
| wd->ovls[i].io_free = TRUE; |
| wd->ovls[i].io_complete = FALSE; |
| |
| wd->ovls[i].o.hEvent = CreateEvent(NULL, TRUE, FALSE, NULL); |
| if (wd->ovls[i].o.hEvent == NULL) { |
| rc = 1; |
| break; |
| } |
| } |
| } |
| |
| if (!rc) { |
| /* Create an auto-reset event */ |
| wd->iocomplete_event = CreateEvent(NULL, FALSE, FALSE, NULL); |
| if (wd->iocomplete_event == NULL) |
| rc = 1; |
| } |
| |
| if (rc) { |
| if (wd != NULL) { |
| if (wd->ovls != NULL) |
| free(wd->ovls); |
| if (wd->aio_events != NULL) |
| free(wd->aio_events); |
| |
| free(wd); |
| } |
| } |
| |
| hKernel32Dll = GetModuleHandle("kernel32.dll"); |
| wd->pCancelIoEx = (CANCELIOEX)GetProcAddress(hKernel32Dll, "CancelIoEx"); |
| td->io_ops->data = wd; |
| |
| return rc; |
| } |
| |
| static void fio_windowsaio_cleanup(struct thread_data *td) |
| { |
| int i; |
| 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); |
| |
| for (i = 0; i < td->o.iodepth; i++) { |
| CloseHandle(wd->ovls[i].o.hEvent); |
| } |
| |
| free(wd->aio_events); |
| free(wd->ovls); |
| free(wd); |
| |
| td->io_ops->data = NULL; |
| } |
| } |
| |
| |
| static int fio_windowsaio_open_file(struct thread_data *td, struct fio_file *f) |
| { |
| int rc = 0; |
| HANDLE hFile; |
| 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("fio: windowsaio doesn't support pipes\n"); |
| return 1; |
| } |
| |
| if (!strcmp(f->file_name, "-")) { |
| log_err("fio: 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) |
| 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 thread_ctx *ctx; |
| struct windowsaio_data *wd; |
| |
| hFile = CreateIoCompletionPort(f->hFile, NULL, 0, 0); |
| |
| wd = td->io_ops->data; |
| wd->iothread_running = TRUE; |
| |
| if (!rc) { |
| ctx = malloc(sizeof(struct thread_ctx)); |
| ctx->iocp = hFile; |
| ctx->wd = wd; |
| |
| wd->iothread = CreateThread(NULL, 0, IoCompletionRoutine, ctx, 0, NULL); |
| } |
| |
| if (rc || wd->iothread == NULL) |
| 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)) |
| 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, struct timespec *t) |
| { |
| struct windowsaio_data *wd = td->io_ops->data; |
| struct flist_head *entry; |
| unsigned int dequeued = 0; |
| struct io_u *io_u; |
| 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 { |
| flist_for_each(entry, &td->io_u_busylist) { |
| io_u = flist_entry(entry, struct io_u, list); |
| fov = (struct fio_overlapped*)io_u->engine_data; |
| |
| if (fov->io_complete) { |
| fov->io_complete = FALSE; |
| fov->io_free = TRUE; |
| ResetEvent(fov->o.hEvent); |
| 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) |
| { |
| LPOVERLAPPED lpOvl = NULL; |
| struct windowsaio_data *wd; |
| DWORD iobytes; |
| BOOL success = FALSE; |
| int index; |
| int rc = FIO_Q_COMPLETED; |
| |
| fio_ro_check(td, io_u); |
| |
| wd = td->io_ops->data; |
| |
| for (index = 0; index < td->o.iodepth; index++) { |
| if (wd->ovls[index].io_free) |
| break; |
| } |
| |
| assert(index < td->o.iodepth); |
| |
| wd->ovls[index].io_free = FALSE; |
| wd->ovls[index].io_u = io_u; |
| lpOvl = &wd->ovls[index].o; |
| lpOvl->Internal = STATUS_PENDING; |
| lpOvl->InternalHigh = 0; |
| lpOvl->Offset = io_u->offset & 0xFFFFFFFF; |
| lpOvl->OffsetHigh = io_u->offset >> 32; |
| io_u->engine_data = &wd->ovls[index]; |
| |
| switch (io_u->ddir) { |
| case DDIR_WRITE: |
| success = WriteFile(io_u->file->hFile, io_u->xfer_buf, io_u->xfer_buflen, &iobytes, lpOvl); |
| break; |
| case DDIR_READ: |
| success = ReadFile(io_u->file->hFile, io_u->xfer_buf, io_u->xfer_buflen, &iobytes, lpOvl); |
| break; |
| case DDIR_SYNC: |
| case DDIR_DATASYNC: |
| case DDIR_SYNC_FILE_RANGE: |
| success = FlushFileBuffers(io_u->file->hFile); |
| if (!success) |
| io_u->error = GetLastError(); |
| |
| return FIO_Q_COMPLETED; |
| break; |
| case DDIR_TRIM: |
| log_err("manual TRIM isn't supported on Windows"); |
| 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 = 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)) |
| 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 = ovl->Internal; |
| } |
| |
| fov->io_complete = TRUE; |
| SetEvent(wd->iocomplete_event); |
| } while (ctx->wd->iothread_running); |
| |
| CloseHandle(ctx->iocp); |
| free(ctx); |
| return 0; |
| } |
| |
| static int fio_windowsaio_cancel(struct thread_data *td, |
| struct io_u *io_u) |
| { |
| int rc = 0; |
| |
| struct windowsaio_data *wd = td->io_ops->data; |
| |
| /* If we're running on Vista or newer, we can cancel individual IO requests */ |
| if (wd->pCancelIoEx != NULL) { |
| struct fio_overlapped *ovl = io_u->engine_data; |
| |
| if (!wd->pCancelIoEx(io_u->file->hFile, &ovl->o)) |
| rc = 1; |
| } else |
| rc = 1; |
| |
| return rc; |
| } |
| |
| static struct ioengine_ops ioengine = { |
| .name = "windowsaio", |
| .version = FIO_IOOPS_VERSION, |
| .init = fio_windowsaio_init, |
| .queue = fio_windowsaio_queue, |
| .cancel = fio_windowsaio_cancel, |
| .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 |
| }; |
| |
| static void fio_init fio_posixaio_register(void) |
| { |
| register_ioengine(&ioengine); |
| } |
| |
| static void fio_exit fio_posixaio_unregister(void) |
| { |
| unregister_ioengine(&ioengine); |
| } |