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/*
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* Block driver for RAW files (win32)
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*
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* Copyright (c) 2006 Fabrice Bellard
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "qemu-common.h" |
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#ifndef QEMU_IMG
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#include "qemu-timer.h" |
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#include "exec-all.h" |
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#endif
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#include "block_int.h" |
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#include <assert.h> |
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#include <winioctl.h> |
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#define FTYPE_FILE 0 |
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#define FTYPE_CD 1 |
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#define FTYPE_HARDDISK 2 |
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typedef struct BDRVRawState { |
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HANDLE hfile; |
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int type;
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char drive_path[16]; /* format: "d:\" */ |
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} BDRVRawState; |
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|
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typedef struct RawAIOCB { |
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BlockDriverAIOCB common; |
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HANDLE hEvent; |
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OVERLAPPED ov; |
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int count;
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} RawAIOCB; |
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|
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int qemu_ftruncate64(int fd, int64_t length) |
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{ |
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LARGE_INTEGER li; |
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LONG high; |
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HANDLE h; |
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BOOL res; |
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|
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if ((GetVersion() & 0x80000000UL) && (length >> 32) != 0) |
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return -1; |
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h = (HANDLE)_get_osfhandle(fd); |
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/* get current position, ftruncate do not change position */
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li.HighPart = 0;
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li.LowPart = SetFilePointer (h, 0, &li.HighPart, FILE_CURRENT);
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if (li.LowPart == 0xffffffffUL && GetLastError() != NO_ERROR) |
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return -1; |
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|
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high = length >> 32;
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if (!SetFilePointer(h, (DWORD) length, &high, FILE_BEGIN))
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return -1; |
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res = SetEndOfFile(h); |
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|
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/* back to old position */
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SetFilePointer(h, li.LowPart, &li.HighPart, FILE_BEGIN); |
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return res ? 0 : -1; |
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} |
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|
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static int set_sparse(int fd) |
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{ |
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DWORD returned; |
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return (int) DeviceIoControl((HANDLE)_get_osfhandle(fd), FSCTL_SET_SPARSE, |
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NULL, 0, NULL, 0, &returned, NULL); |
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} |
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|
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static int raw_open(BlockDriverState *bs, const char *filename, int flags) |
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{ |
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BDRVRawState *s = bs->opaque; |
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int access_flags, create_flags;
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DWORD overlapped; |
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s->type = FTYPE_FILE; |
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|
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if ((flags & BDRV_O_ACCESS) == O_RDWR) {
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access_flags = GENERIC_READ | GENERIC_WRITE; |
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} else {
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access_flags = GENERIC_READ; |
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} |
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if (flags & BDRV_O_CREAT) {
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create_flags = CREATE_ALWAYS; |
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} else {
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create_flags = OPEN_EXISTING; |
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} |
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#ifdef QEMU_IMG
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overlapped = FILE_ATTRIBUTE_NORMAL; |
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#else
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overlapped = FILE_FLAG_OVERLAPPED; |
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#endif
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if (flags & BDRV_O_DIRECT)
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overlapped |= FILE_FLAG_NO_BUFFERING | FILE_FLAG_WRITE_THROUGH; |
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s->hfile = CreateFile(filename, access_flags, |
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FILE_SHARE_READ, NULL,
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create_flags, overlapped, NULL);
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if (s->hfile == INVALID_HANDLE_VALUE) {
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int err = GetLastError();
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if (err == ERROR_ACCESS_DENIED)
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return -EACCES;
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return -1; |
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} |
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return 0; |
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} |
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|
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static int raw_pread(BlockDriverState *bs, int64_t offset, |
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uint8_t *buf, int count)
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{ |
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BDRVRawState *s = bs->opaque; |
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OVERLAPPED ov; |
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DWORD ret_count; |
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int ret;
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|
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memset(&ov, 0, sizeof(ov)); |
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ov.Offset = offset; |
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ov.OffsetHigh = offset >> 32;
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ret = ReadFile(s->hfile, buf, count, &ret_count, &ov); |
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if (!ret) {
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ret = GetOverlappedResult(s->hfile, &ov, &ret_count, TRUE); |
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if (!ret)
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return -EIO;
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else
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return ret_count;
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} |
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return ret_count;
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} |
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static int raw_pwrite(BlockDriverState *bs, int64_t offset, |
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const uint8_t *buf, int count) |
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{ |
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BDRVRawState *s = bs->opaque; |
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OVERLAPPED ov; |
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DWORD ret_count; |
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int ret;
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|
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memset(&ov, 0, sizeof(ov)); |
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ov.Offset = offset; |
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ov.OffsetHigh = offset >> 32;
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ret = WriteFile(s->hfile, buf, count, &ret_count, &ov); |
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if (!ret) {
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ret = GetOverlappedResult(s->hfile, &ov, &ret_count, TRUE); |
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if (!ret)
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return -EIO;
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else
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return ret_count;
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} |
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return ret_count;
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} |
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#if 0
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#ifndef QEMU_IMG
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static void raw_aio_cb(void *opaque)
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{
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RawAIOCB *acb = opaque;
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BlockDriverState *bs = acb->common.bs;
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BDRVRawState *s = bs->opaque;
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DWORD ret_count;
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int ret;
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ret = GetOverlappedResult(s->hfile, &acb->ov, &ret_count, TRUE);
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if (!ret || ret_count != acb->count) {
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acb->common.cb(acb->common.opaque, -EIO);
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} else {
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acb->common.cb(acb->common.opaque, 0);
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}
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}
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#endif
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static RawAIOCB *raw_aio_setup(BlockDriverState *bs,
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int64_t sector_num, uint8_t *buf, int nb_sectors,
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BlockDriverCompletionFunc *cb, void *opaque)
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{ |
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RawAIOCB *acb; |
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int64_t offset; |
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acb = qemu_aio_get(bs, cb, opaque); |
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if (acb->hEvent) {
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acb->hEvent = CreateEvent(NULL, TRUE, FALSE, NULL); |
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if (!acb->hEvent) {
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qemu_aio_release(acb); |
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return NULL; |
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} |
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} |
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memset(&acb->ov, 0, sizeof(acb->ov)); |
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offset = sector_num * 512;
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acb->ov.Offset = offset; |
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acb->ov.OffsetHigh = offset >> 32;
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acb->ov.hEvent = acb->hEvent; |
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acb->count = nb_sectors * 512;
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#ifndef QEMU_IMG
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qemu_add_wait_object(acb->ov.hEvent, raw_aio_cb, acb); |
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#endif
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return acb;
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} |
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static BlockDriverAIOCB *raw_aio_read(BlockDriverState *bs,
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int64_t sector_num, uint8_t *buf, int nb_sectors,
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BlockDriverCompletionFunc *cb, void *opaque)
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{ |
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BDRVRawState *s = bs->opaque; |
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RawAIOCB *acb; |
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int ret;
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acb = raw_aio_setup(bs, sector_num, buf, nb_sectors, cb, opaque); |
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if (!acb)
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return NULL; |
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ret = ReadFile(s->hfile, buf, acb->count, NULL, &acb->ov);
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if (!ret) {
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qemu_aio_release(acb); |
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return NULL; |
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} |
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#ifdef QEMU_IMG
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qemu_aio_release(acb); |
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#endif
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return (BlockDriverAIOCB *)acb;
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} |
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static BlockDriverAIOCB *raw_aio_write(BlockDriverState *bs,
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int64_t sector_num, uint8_t *buf, int nb_sectors,
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BlockDriverCompletionFunc *cb, void *opaque)
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{ |
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BDRVRawState *s = bs->opaque; |
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RawAIOCB *acb; |
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int ret;
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acb = raw_aio_setup(bs, sector_num, buf, nb_sectors, cb, opaque); |
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if (!acb)
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return NULL; |
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ret = WriteFile(s->hfile, buf, acb->count, NULL, &acb->ov);
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if (!ret) {
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qemu_aio_release(acb); |
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return NULL; |
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} |
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#ifdef QEMU_IMG
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qemu_aio_release(acb); |
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#endif
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return (BlockDriverAIOCB *)acb;
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} |
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static void raw_aio_cancel(BlockDriverAIOCB *blockacb) |
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{ |
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#ifndef QEMU_IMG
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RawAIOCB *acb = (RawAIOCB *)blockacb; |
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BlockDriverState *bs = acb->common.bs; |
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BDRVRawState *s = bs->opaque; |
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qemu_del_wait_object(acb->ov.hEvent, raw_aio_cb, acb); |
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/* XXX: if more than one async I/O it is not correct */
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CancelIo(s->hfile); |
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qemu_aio_release(acb); |
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#endif
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} |
270 |
#endif /* #if 0 */ |
271 |
|
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static void raw_flush(BlockDriverState *bs) |
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{ |
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BDRVRawState *s = bs->opaque; |
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FlushFileBuffers(s->hfile); |
276 |
} |
277 |
|
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static void raw_close(BlockDriverState *bs) |
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{ |
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BDRVRawState *s = bs->opaque; |
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CloseHandle(s->hfile); |
282 |
} |
283 |
|
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static int raw_truncate(BlockDriverState *bs, int64_t offset) |
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{ |
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BDRVRawState *s = bs->opaque; |
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DWORD low, high; |
288 |
|
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low = offset; |
290 |
high = offset >> 32;
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if (!SetFilePointer(s->hfile, low, &high, FILE_BEGIN))
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return -EIO;
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if (!SetEndOfFile(s->hfile))
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return -EIO;
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return 0; |
296 |
} |
297 |
|
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static int64_t raw_getlength(BlockDriverState *bs)
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{ |
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BDRVRawState *s = bs->opaque; |
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LARGE_INTEGER l; |
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ULARGE_INTEGER available, total, total_free; |
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DISK_GEOMETRY_EX dg; |
304 |
DWORD count; |
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BOOL status; |
306 |
|
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switch(s->type) {
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case FTYPE_FILE:
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l.LowPart = GetFileSize(s->hfile, &l.HighPart); |
310 |
if (l.LowPart == 0xffffffffUL && GetLastError() != NO_ERROR) |
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return -EIO;
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break;
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case FTYPE_CD:
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if (!GetDiskFreeSpaceEx(s->drive_path, &available, &total, &total_free))
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return -EIO;
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l.QuadPart = total.QuadPart; |
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break;
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case FTYPE_HARDDISK:
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status = DeviceIoControl(s->hfile, IOCTL_DISK_GET_DRIVE_GEOMETRY_EX, |
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NULL, 0, &dg, sizeof(dg), &count, NULL); |
321 |
if (status != 0) { |
322 |
l = dg.DiskSize; |
323 |
} |
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break;
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default:
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return -EIO;
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} |
328 |
return l.QuadPart;
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} |
330 |
|
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static int raw_create(const char *filename, int64_t total_size, |
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const char *backing_file, int flags) |
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{ |
334 |
int fd;
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335 |
|
336 |
if (flags || backing_file)
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return -ENOTSUP;
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338 |
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339 |
fd = open(filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY, |
340 |
0644);
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341 |
if (fd < 0) |
342 |
return -EIO;
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set_sparse(fd); |
344 |
ftruncate(fd, total_size * 512);
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close(fd); |
346 |
return 0; |
347 |
} |
348 |
|
349 |
void qemu_aio_init(void) |
350 |
{ |
351 |
} |
352 |
|
353 |
void qemu_aio_poll(void) |
354 |
{ |
355 |
} |
356 |
|
357 |
void qemu_aio_flush(void) |
358 |
{ |
359 |
} |
360 |
|
361 |
void qemu_aio_wait_start(void) |
362 |
{ |
363 |
} |
364 |
|
365 |
void qemu_aio_wait(void) |
366 |
{ |
367 |
#ifndef QEMU_IMG
|
368 |
qemu_bh_poll(); |
369 |
#endif
|
370 |
} |
371 |
|
372 |
void qemu_aio_wait_end(void) |
373 |
{ |
374 |
} |
375 |
|
376 |
BlockDriver bdrv_raw = { |
377 |
"raw",
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sizeof(BDRVRawState),
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NULL, /* no probe for protocols */ |
380 |
raw_open, |
381 |
NULL,
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382 |
NULL,
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383 |
raw_close, |
384 |
raw_create, |
385 |
raw_flush, |
386 |
|
387 |
#if 0
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388 |
.bdrv_aio_read = raw_aio_read,
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389 |
.bdrv_aio_write = raw_aio_write,
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390 |
.bdrv_aio_cancel = raw_aio_cancel,
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.aiocb_size = sizeof(RawAIOCB);
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#endif
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.protocol_name = "file",
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394 |
.bdrv_pread = raw_pread, |
395 |
.bdrv_pwrite = raw_pwrite, |
396 |
.bdrv_truncate = raw_truncate, |
397 |
.bdrv_getlength = raw_getlength, |
398 |
}; |
399 |
|
400 |
/***********************************************/
|
401 |
/* host device */
|
402 |
|
403 |
static int find_cdrom(char *cdrom_name, int cdrom_name_size) |
404 |
{ |
405 |
char drives[256], *pdrv = drives; |
406 |
UINT type; |
407 |
|
408 |
memset(drives, 0, sizeof(drives)); |
409 |
GetLogicalDriveStrings(sizeof(drives), drives);
|
410 |
while(pdrv[0] != '\0') { |
411 |
type = GetDriveType(pdrv); |
412 |
switch(type) {
|
413 |
case DRIVE_CDROM:
|
414 |
snprintf(cdrom_name, cdrom_name_size, "\\\\.\\%c:", pdrv[0]); |
415 |
return 0; |
416 |
break;
|
417 |
} |
418 |
pdrv += lstrlen(pdrv) + 1;
|
419 |
} |
420 |
return -1; |
421 |
} |
422 |
|
423 |
static int find_device_type(BlockDriverState *bs, const char *filename) |
424 |
{ |
425 |
BDRVRawState *s = bs->opaque; |
426 |
UINT type; |
427 |
const char *p; |
428 |
|
429 |
if (strstart(filename, "\\\\.\\", &p) || |
430 |
strstart(filename, "//./", &p)) {
|
431 |
if (stristart(p, "PhysicalDrive", NULL)) |
432 |
return FTYPE_HARDDISK;
|
433 |
snprintf(s->drive_path, sizeof(s->drive_path), "%c:\\", p[0]); |
434 |
type = GetDriveType(s->drive_path); |
435 |
if (type == DRIVE_CDROM)
|
436 |
return FTYPE_CD;
|
437 |
else
|
438 |
return FTYPE_FILE;
|
439 |
} else {
|
440 |
return FTYPE_FILE;
|
441 |
} |
442 |
} |
443 |
|
444 |
static int hdev_open(BlockDriverState *bs, const char *filename, int flags) |
445 |
{ |
446 |
BDRVRawState *s = bs->opaque; |
447 |
int access_flags, create_flags;
|
448 |
DWORD overlapped; |
449 |
char device_name[64]; |
450 |
|
451 |
if (strstart(filename, "/dev/cdrom", NULL)) { |
452 |
if (find_cdrom(device_name, sizeof(device_name)) < 0) |
453 |
return -ENOENT;
|
454 |
filename = device_name; |
455 |
} else {
|
456 |
/* transform drive letters into device name */
|
457 |
if (((filename[0] >= 'a' && filename[0] <= 'z') || |
458 |
(filename[0] >= 'A' && filename[0] <= 'Z')) && |
459 |
filename[1] == ':' && filename[2] == '\0') { |
460 |
snprintf(device_name, sizeof(device_name), "\\\\.\\%c:", filename[0]); |
461 |
filename = device_name; |
462 |
} |
463 |
} |
464 |
s->type = find_device_type(bs, filename); |
465 |
|
466 |
if ((flags & BDRV_O_ACCESS) == O_RDWR) {
|
467 |
access_flags = GENERIC_READ | GENERIC_WRITE; |
468 |
} else {
|
469 |
access_flags = GENERIC_READ; |
470 |
} |
471 |
create_flags = OPEN_EXISTING; |
472 |
|
473 |
#ifdef QEMU_IMG
|
474 |
overlapped = FILE_ATTRIBUTE_NORMAL; |
475 |
#else
|
476 |
overlapped = FILE_FLAG_OVERLAPPED; |
477 |
#endif
|
478 |
if (flags & BDRV_O_DIRECT)
|
479 |
overlapped |= FILE_FLAG_NO_BUFFERING | FILE_FLAG_WRITE_THROUGH; |
480 |
s->hfile = CreateFile(filename, access_flags, |
481 |
FILE_SHARE_READ, NULL,
|
482 |
create_flags, overlapped, NULL);
|
483 |
if (s->hfile == INVALID_HANDLE_VALUE) {
|
484 |
int err = GetLastError();
|
485 |
|
486 |
if (err == ERROR_ACCESS_DENIED)
|
487 |
return -EACCES;
|
488 |
return -1; |
489 |
} |
490 |
return 0; |
491 |
} |
492 |
|
493 |
#if 0
|
494 |
/***********************************************/
|
495 |
/* removable device additional commands */
|
496 |
|
497 |
static int raw_is_inserted(BlockDriverState *bs)
|
498 |
{
|
499 |
return 1;
|
500 |
}
|
501 |
|
502 |
static int raw_media_changed(BlockDriverState *bs)
|
503 |
{
|
504 |
return -ENOTSUP;
|
505 |
}
|
506 |
|
507 |
static int raw_eject(BlockDriverState *bs, int eject_flag)
|
508 |
{
|
509 |
DWORD ret_count;
|
510 |
|
511 |
if (s->type == FTYPE_FILE)
|
512 |
return -ENOTSUP;
|
513 |
if (eject_flag) {
|
514 |
DeviceIoControl(s->hfile, IOCTL_STORAGE_EJECT_MEDIA,
|
515 |
NULL, 0, NULL, 0, &lpBytesReturned, NULL);
|
516 |
} else {
|
517 |
DeviceIoControl(s->hfile, IOCTL_STORAGE_LOAD_MEDIA,
|
518 |
NULL, 0, NULL, 0, &lpBytesReturned, NULL);
|
519 |
}
|
520 |
}
|
521 |
|
522 |
static int raw_set_locked(BlockDriverState *bs, int locked)
|
523 |
{
|
524 |
return -ENOTSUP;
|
525 |
}
|
526 |
#endif
|
527 |
|
528 |
BlockDriver bdrv_host_device = { |
529 |
"host_device",
|
530 |
sizeof(BDRVRawState),
|
531 |
NULL, /* no probe for protocols */ |
532 |
hdev_open, |
533 |
NULL,
|
534 |
NULL,
|
535 |
raw_close, |
536 |
NULL,
|
537 |
raw_flush, |
538 |
|
539 |
#if 0
|
540 |
.bdrv_aio_read = raw_aio_read,
|
541 |
.bdrv_aio_write = raw_aio_write,
|
542 |
.bdrv_aio_cancel = raw_aio_cancel,
|
543 |
.aiocb_size = sizeof(RawAIOCB);
|
544 |
#endif
|
545 |
.bdrv_pread = raw_pread, |
546 |
.bdrv_pwrite = raw_pwrite, |
547 |
.bdrv_getlength = raw_getlength, |
548 |
}; |