1a2736526SPaolo Bonzini /*
2a2736526SPaolo Bonzini * Block driver for RAW files (win32)
3a2736526SPaolo Bonzini *
4a2736526SPaolo Bonzini * Copyright (c) 2006 Fabrice Bellard
5a2736526SPaolo Bonzini *
6a2736526SPaolo Bonzini * Permission is hereby granted, free of charge, to any person obtaining a copy
7a2736526SPaolo Bonzini * of this software and associated documentation files (the "Software"), to deal
8a2736526SPaolo Bonzini * in the Software without restriction, including without limitation the rights
9a2736526SPaolo Bonzini * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10a2736526SPaolo Bonzini * copies of the Software, and to permit persons to whom the Software is
11a2736526SPaolo Bonzini * furnished to do so, subject to the following conditions:
12a2736526SPaolo Bonzini *
13a2736526SPaolo Bonzini * The above copyright notice and this permission notice shall be included in
14a2736526SPaolo Bonzini * all copies or substantial portions of the Software.
15a2736526SPaolo Bonzini *
16a2736526SPaolo Bonzini * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17a2736526SPaolo Bonzini * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18a2736526SPaolo Bonzini * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19a2736526SPaolo Bonzini * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20a2736526SPaolo Bonzini * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21a2736526SPaolo Bonzini * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
22a2736526SPaolo Bonzini * THE SOFTWARE.
23a2736526SPaolo Bonzini */
240b8fa32fSMarkus Armbruster
2580c71a24SPeter Maydell #include "qemu/osdep.h"
261de7afc9SPaolo Bonzini #include "qemu/timer.h"
27e2c1c34fSMarkus Armbruster #include "block/block-io.h"
28737e150eSPaolo Bonzini #include "block/block_int.h"
29737e150eSPaolo Bonzini #include "block/aio.h"
300187f5c9SPaolo Bonzini #include "block/raw-aio.h"
311de7afc9SPaolo Bonzini #include "qemu/event_notifier.h"
323249dbe6SMichael Tokarev #include "qemu/iov.h"
335df022cfSPeter Maydell #include "qemu/memalign.h"
34a2736526SPaolo Bonzini #include <windows.h>
35a2736526SPaolo Bonzini #include <winioctl.h>
36a2736526SPaolo Bonzini
37a2736526SPaolo Bonzini #define FTYPE_FILE 0
38a2736526SPaolo Bonzini #define FTYPE_CD 1
39a2736526SPaolo Bonzini #define FTYPE_HARDDISK 2
40a2736526SPaolo Bonzini
41a2736526SPaolo Bonzini struct QEMUWin32AIOState {
42a2736526SPaolo Bonzini HANDLE hIOCP;
43a2736526SPaolo Bonzini EventNotifier e;
44a2736526SPaolo Bonzini int count;
459d456654SPaolo Bonzini AioContext *aio_ctx;
46a2736526SPaolo Bonzini };
47a2736526SPaolo Bonzini
48a2736526SPaolo Bonzini typedef struct QEMUWin32AIOCB {
497c84b1b8SMarkus Armbruster BlockAIOCB common;
50a2736526SPaolo Bonzini struct QEMUWin32AIOState *ctx;
51a2736526SPaolo Bonzini int nbytes;
52a2736526SPaolo Bonzini OVERLAPPED ov;
53a2736526SPaolo Bonzini QEMUIOVector *qiov;
54a2736526SPaolo Bonzini void *buf;
55a2736526SPaolo Bonzini bool is_read;
56a2736526SPaolo Bonzini bool is_linear;
57a2736526SPaolo Bonzini } QEMUWin32AIOCB;
58a2736526SPaolo Bonzini
59a2736526SPaolo Bonzini /*
60a2736526SPaolo Bonzini * Completes an AIO request (calls the callback and frees the ACB).
61a2736526SPaolo Bonzini */
win32_aio_process_completion(QEMUWin32AIOState * s,QEMUWin32AIOCB * waiocb,DWORD count)62a2736526SPaolo Bonzini static void win32_aio_process_completion(QEMUWin32AIOState *s,
63a2736526SPaolo Bonzini QEMUWin32AIOCB *waiocb, DWORD count)
64a2736526SPaolo Bonzini {
65a2736526SPaolo Bonzini int ret;
66a2736526SPaolo Bonzini s->count--;
67a2736526SPaolo Bonzini
68a2736526SPaolo Bonzini if (waiocb->ov.Internal != 0) {
69a2736526SPaolo Bonzini ret = -EIO;
70a2736526SPaolo Bonzini } else {
71a2736526SPaolo Bonzini ret = 0;
72a2736526SPaolo Bonzini if (count < waiocb->nbytes) {
73a2736526SPaolo Bonzini /* Short reads mean EOF, pad with zeros. */
74a2736526SPaolo Bonzini if (waiocb->is_read) {
75a2736526SPaolo Bonzini qemu_iovec_memset(waiocb->qiov, count, 0,
76a2736526SPaolo Bonzini waiocb->qiov->size - count);
77a2736526SPaolo Bonzini } else {
78a2736526SPaolo Bonzini ret = -EINVAL;
79a2736526SPaolo Bonzini }
80a2736526SPaolo Bonzini }
81a2736526SPaolo Bonzini }
82a2736526SPaolo Bonzini
83a2736526SPaolo Bonzini if (!waiocb->is_linear) {
84a2736526SPaolo Bonzini if (ret == 0 && waiocb->is_read) {
85a2736526SPaolo Bonzini QEMUIOVector *qiov = waiocb->qiov;
863249dbe6SMichael Tokarev iov_from_buf(qiov->iov, qiov->niov, 0, waiocb->buf, qiov->size);
87a2736526SPaolo Bonzini }
88e8bccad5SKevin Wolf qemu_vfree(waiocb->buf);
89a2736526SPaolo Bonzini }
90a2736526SPaolo Bonzini
91a2736526SPaolo Bonzini waiocb->common.cb(waiocb->common.opaque, ret);
928007429aSFam Zheng qemu_aio_unref(waiocb);
93a2736526SPaolo Bonzini }
94a2736526SPaolo Bonzini
win32_aio_completion_cb(EventNotifier * e)95a2736526SPaolo Bonzini static void win32_aio_completion_cb(EventNotifier *e)
96a2736526SPaolo Bonzini {
97a2736526SPaolo Bonzini QEMUWin32AIOState *s = container_of(e, QEMUWin32AIOState, e);
98a2736526SPaolo Bonzini DWORD count;
99a2736526SPaolo Bonzini ULONG_PTR key;
100a2736526SPaolo Bonzini OVERLAPPED *ov;
101a2736526SPaolo Bonzini
102a2736526SPaolo Bonzini event_notifier_test_and_clear(&s->e);
103a2736526SPaolo Bonzini while (GetQueuedCompletionStatus(s->hIOCP, &count, &key, &ov, 0)) {
104a2736526SPaolo Bonzini QEMUWin32AIOCB *waiocb = container_of(ov, QEMUWin32AIOCB, ov);
105a2736526SPaolo Bonzini
106a2736526SPaolo Bonzini win32_aio_process_completion(s, waiocb, count);
107a2736526SPaolo Bonzini }
108a2736526SPaolo Bonzini }
109a2736526SPaolo Bonzini
110d7331bedSStefan Hajnoczi static const AIOCBInfo win32_aiocb_info = {
111a2736526SPaolo Bonzini .aiocb_size = sizeof(QEMUWin32AIOCB),
112a2736526SPaolo Bonzini };
113a2736526SPaolo Bonzini
win32_aio_submit(BlockDriverState * bs,QEMUWin32AIOState * aio,HANDLE hfile,uint64_t offset,uint64_t bytes,QEMUIOVector * qiov,BlockCompletionFunc * cb,void * opaque,int type)1147c84b1b8SMarkus Armbruster BlockAIOCB *win32_aio_submit(BlockDriverState *bs,
115a2736526SPaolo Bonzini QEMUWin32AIOState *aio, HANDLE hfile,
116de7056a3SEric Blake uint64_t offset, uint64_t bytes, QEMUIOVector *qiov,
117097310b5SMarkus Armbruster BlockCompletionFunc *cb, void *opaque, int type)
118a2736526SPaolo Bonzini {
119a2736526SPaolo Bonzini struct QEMUWin32AIOCB *waiocb;
120a2736526SPaolo Bonzini DWORD rc;
121a2736526SPaolo Bonzini
122d7331bedSStefan Hajnoczi waiocb = qemu_aio_get(&win32_aiocb_info, bs, cb, opaque);
123de7056a3SEric Blake waiocb->nbytes = bytes;
124a2736526SPaolo Bonzini waiocb->qiov = qiov;
125a2736526SPaolo Bonzini waiocb->is_read = (type == QEMU_AIO_READ);
126a2736526SPaolo Bonzini
127a2736526SPaolo Bonzini if (qiov->niov > 1) {
1284b6af3d5SKevin Wolf waiocb->buf = qemu_try_blockalign(bs, qiov->size);
1294b6af3d5SKevin Wolf if (waiocb->buf == NULL) {
1304b6af3d5SKevin Wolf goto out;
1314b6af3d5SKevin Wolf }
132a2736526SPaolo Bonzini if (type & QEMU_AIO_WRITE) {
1333249dbe6SMichael Tokarev iov_to_buf(qiov->iov, qiov->niov, 0, waiocb->buf, qiov->size);
134a2736526SPaolo Bonzini }
135a2736526SPaolo Bonzini waiocb->is_linear = false;
136a2736526SPaolo Bonzini } else {
137a2736526SPaolo Bonzini waiocb->buf = qiov->iov[0].iov_base;
138a2736526SPaolo Bonzini waiocb->is_linear = true;
139a2736526SPaolo Bonzini }
140a2736526SPaolo Bonzini
141cee40d2dSStefan Weil memset(&waiocb->ov, 0, sizeof(waiocb->ov));
142cee40d2dSStefan Weil waiocb->ov.Offset = (DWORD)offset;
143cee40d2dSStefan Weil waiocb->ov.OffsetHigh = (DWORD)(offset >> 32);
144cee40d2dSStefan Weil waiocb->ov.hEvent = event_notifier_get_handle(&aio->e);
145cee40d2dSStefan Weil
146a2736526SPaolo Bonzini aio->count++;
147a2736526SPaolo Bonzini
148a2736526SPaolo Bonzini if (type & QEMU_AIO_READ) {
149a2736526SPaolo Bonzini rc = ReadFile(hfile, waiocb->buf, waiocb->nbytes, NULL, &waiocb->ov);
150a2736526SPaolo Bonzini } else {
151a2736526SPaolo Bonzini rc = WriteFile(hfile, waiocb->buf, waiocb->nbytes, NULL, &waiocb->ov);
152a2736526SPaolo Bonzini }
153a2736526SPaolo Bonzini if(rc == 0 && GetLastError() != ERROR_IO_PENDING) {
154a2736526SPaolo Bonzini goto out_dec_count;
155a2736526SPaolo Bonzini }
156a2736526SPaolo Bonzini return &waiocb->common;
157a2736526SPaolo Bonzini
158a2736526SPaolo Bonzini out_dec_count:
159a2736526SPaolo Bonzini aio->count--;
1604b6af3d5SKevin Wolf out:
1618007429aSFam Zheng qemu_aio_unref(waiocb);
162a2736526SPaolo Bonzini return NULL;
163a2736526SPaolo Bonzini }
164a2736526SPaolo Bonzini
win32_aio_attach(QEMUWin32AIOState * aio,HANDLE hfile)165a2736526SPaolo Bonzini int win32_aio_attach(QEMUWin32AIOState *aio, HANDLE hfile)
166a2736526SPaolo Bonzini {
167a2736526SPaolo Bonzini if (CreateIoCompletionPort(hfile, aio->hIOCP, (ULONG_PTR) 0, 0) == NULL) {
168a2736526SPaolo Bonzini return -EINVAL;
169a2736526SPaolo Bonzini } else {
170a2736526SPaolo Bonzini return 0;
171a2736526SPaolo Bonzini }
172a2736526SPaolo Bonzini }
173a2736526SPaolo Bonzini
win32_aio_detach_aio_context(QEMUWin32AIOState * aio,AioContext * old_context)17485ebd381SStefan Hajnoczi void win32_aio_detach_aio_context(QEMUWin32AIOState *aio,
17585ebd381SStefan Hajnoczi AioContext *old_context)
17685ebd381SStefan Hajnoczi {
177*60f782b6SStefan Hajnoczi aio_set_event_notifier(old_context, &aio->e, NULL, NULL, NULL);
1789d456654SPaolo Bonzini aio->aio_ctx = NULL;
17985ebd381SStefan Hajnoczi }
18085ebd381SStefan Hajnoczi
win32_aio_attach_aio_context(QEMUWin32AIOState * aio,AioContext * new_context)18185ebd381SStefan Hajnoczi void win32_aio_attach_aio_context(QEMUWin32AIOState *aio,
18285ebd381SStefan Hajnoczi AioContext *new_context)
18385ebd381SStefan Hajnoczi {
1849d456654SPaolo Bonzini aio->aio_ctx = new_context;
185*60f782b6SStefan Hajnoczi aio_set_event_notifier(new_context, &aio->e, win32_aio_completion_cb,
186*60f782b6SStefan Hajnoczi NULL, NULL);
18785ebd381SStefan Hajnoczi }
18885ebd381SStefan Hajnoczi
win32_aio_init(void)189a2736526SPaolo Bonzini QEMUWin32AIOState *win32_aio_init(void)
190a2736526SPaolo Bonzini {
191a2736526SPaolo Bonzini QEMUWin32AIOState *s;
192a2736526SPaolo Bonzini
193a2736526SPaolo Bonzini s = g_malloc0(sizeof(*s));
194a2736526SPaolo Bonzini if (event_notifier_init(&s->e, false) < 0) {
195a2736526SPaolo Bonzini goto out_free_state;
196a2736526SPaolo Bonzini }
197a2736526SPaolo Bonzini
198a2736526SPaolo Bonzini s->hIOCP = CreateIoCompletionPort(INVALID_HANDLE_VALUE, NULL, 0, 0);
199a2736526SPaolo Bonzini if (s->hIOCP == NULL) {
200a2736526SPaolo Bonzini goto out_close_efd;
201a2736526SPaolo Bonzini }
202a2736526SPaolo Bonzini
203a2736526SPaolo Bonzini return s;
204a2736526SPaolo Bonzini
205a2736526SPaolo Bonzini out_close_efd:
206a2736526SPaolo Bonzini event_notifier_cleanup(&s->e);
207a2736526SPaolo Bonzini out_free_state:
208a2736526SPaolo Bonzini g_free(s);
209a2736526SPaolo Bonzini return NULL;
210a2736526SPaolo Bonzini }
21199cc5989SStefan Hajnoczi
win32_aio_cleanup(QEMUWin32AIOState * aio)21299cc5989SStefan Hajnoczi void win32_aio_cleanup(QEMUWin32AIOState *aio)
21399cc5989SStefan Hajnoczi {
2149d456654SPaolo Bonzini assert(!aio->aio_ctx);
21599cc5989SStefan Hajnoczi CloseHandle(aio->hIOCP);
21699cc5989SStefan Hajnoczi event_notifier_cleanup(&aio->e);
21799cc5989SStefan Hajnoczi g_free(aio);
21899cc5989SStefan Hajnoczi }
219