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Diffstat (limited to 'qemu/block/raw-win32.c')
-rw-r--r--qemu/block/raw-win32.c731
1 files changed, 0 insertions, 731 deletions
diff --git a/qemu/block/raw-win32.c b/qemu/block/raw-win32.c
deleted file mode 100644
index fd2389153..000000000
--- a/qemu/block/raw-win32.c
+++ /dev/null
@@ -1,731 +0,0 @@
-/*
- * Block driver for RAW files (win32)
- *
- * Copyright (c) 2006 Fabrice Bellard
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
- * THE SOFTWARE.
- */
-#include "qemu/osdep.h"
-#include "qapi/error.h"
-#include "qemu/cutils.h"
-#include "qemu/timer.h"
-#include "block/block_int.h"
-#include "qemu/module.h"
-#include "raw-aio.h"
-#include "trace.h"
-#include "block/thread-pool.h"
-#include "qemu/iov.h"
-#include "qapi/qmp/qstring.h"
-#include <windows.h>
-#include <winioctl.h>
-
-#define FTYPE_FILE 0
-#define FTYPE_CD 1
-#define FTYPE_HARDDISK 2
-
-typedef struct RawWin32AIOData {
- BlockDriverState *bs;
- HANDLE hfile;
- struct iovec *aio_iov;
- int aio_niov;
- size_t aio_nbytes;
- off64_t aio_offset;
- int aio_type;
-} RawWin32AIOData;
-
-typedef struct BDRVRawState {
- HANDLE hfile;
- int type;
- char drive_path[16]; /* format: "d:\" */
- QEMUWin32AIOState *aio;
-} BDRVRawState;
-
-/*
- * Read/writes the data to/from a given linear buffer.
- *
- * Returns the number of bytes handles or -errno in case of an error. Short
- * reads are only returned if the end of the file is reached.
- */
-static size_t handle_aiocb_rw(RawWin32AIOData *aiocb)
-{
- size_t offset = 0;
- int i;
-
- for (i = 0; i < aiocb->aio_niov; i++) {
- OVERLAPPED ov;
- DWORD ret, ret_count, len;
-
- memset(&ov, 0, sizeof(ov));
- ov.Offset = (aiocb->aio_offset + offset);
- ov.OffsetHigh = (aiocb->aio_offset + offset) >> 32;
- len = aiocb->aio_iov[i].iov_len;
- if (aiocb->aio_type & QEMU_AIO_WRITE) {
- ret = WriteFile(aiocb->hfile, aiocb->aio_iov[i].iov_base,
- len, &ret_count, &ov);
- } else {
- ret = ReadFile(aiocb->hfile, aiocb->aio_iov[i].iov_base,
- len, &ret_count, &ov);
- }
- if (!ret) {
- ret_count = 0;
- }
- if (ret_count != len) {
- offset += ret_count;
- break;
- }
- offset += len;
- }
-
- return offset;
-}
-
-static int aio_worker(void *arg)
-{
- RawWin32AIOData *aiocb = arg;
- ssize_t ret = 0;
- size_t count;
-
- switch (aiocb->aio_type & QEMU_AIO_TYPE_MASK) {
- case QEMU_AIO_READ:
- count = handle_aiocb_rw(aiocb);
- if (count < aiocb->aio_nbytes) {
- /* A short read means that we have reached EOF. Pad the buffer
- * with zeros for bytes after EOF. */
- iov_memset(aiocb->aio_iov, aiocb->aio_niov, count,
- 0, aiocb->aio_nbytes - count);
-
- count = aiocb->aio_nbytes;
- }
- if (count == aiocb->aio_nbytes) {
- ret = 0;
- } else {
- ret = -EINVAL;
- }
- break;
- case QEMU_AIO_WRITE:
- count = handle_aiocb_rw(aiocb);
- if (count == aiocb->aio_nbytes) {
- ret = 0;
- } else {
- ret = -EINVAL;
- }
- break;
- case QEMU_AIO_FLUSH:
- if (!FlushFileBuffers(aiocb->hfile)) {
- return -EIO;
- }
- break;
- default:
- fprintf(stderr, "invalid aio request (0x%x)\n", aiocb->aio_type);
- ret = -EINVAL;
- break;
- }
-
- g_free(aiocb);
- return ret;
-}
-
-static BlockAIOCB *paio_submit(BlockDriverState *bs, HANDLE hfile,
- int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
- BlockCompletionFunc *cb, void *opaque, int type)
-{
- RawWin32AIOData *acb = g_new(RawWin32AIOData, 1);
- ThreadPool *pool;
-
- acb->bs = bs;
- acb->hfile = hfile;
- acb->aio_type = type;
-
- if (qiov) {
- acb->aio_iov = qiov->iov;
- acb->aio_niov = qiov->niov;
- }
- acb->aio_nbytes = nb_sectors * 512;
- acb->aio_offset = sector_num * 512;
-
- trace_paio_submit(acb, opaque, sector_num, nb_sectors, type);
- pool = aio_get_thread_pool(bdrv_get_aio_context(bs));
- return thread_pool_submit_aio(pool, aio_worker, acb, cb, opaque);
-}
-
-int qemu_ftruncate64(int fd, int64_t length)
-{
- LARGE_INTEGER li;
- DWORD dw;
- LONG high;
- HANDLE h;
- BOOL res;
-
- if ((GetVersion() & 0x80000000UL) && (length >> 32) != 0)
- return -1;
-
- h = (HANDLE)_get_osfhandle(fd);
-
- /* get current position, ftruncate do not change position */
- li.HighPart = 0;
- li.LowPart = SetFilePointer (h, 0, &li.HighPart, FILE_CURRENT);
- if (li.LowPart == INVALID_SET_FILE_POINTER && GetLastError() != NO_ERROR) {
- return -1;
- }
-
- high = length >> 32;
- dw = SetFilePointer(h, (DWORD) length, &high, FILE_BEGIN);
- if (dw == INVALID_SET_FILE_POINTER && GetLastError() != NO_ERROR) {
- return -1;
- }
- res = SetEndOfFile(h);
-
- /* back to old position */
- SetFilePointer(h, li.LowPart, &li.HighPart, FILE_BEGIN);
- return res ? 0 : -1;
-}
-
-static int set_sparse(int fd)
-{
- DWORD returned;
- return (int) DeviceIoControl((HANDLE)_get_osfhandle(fd), FSCTL_SET_SPARSE,
- NULL, 0, NULL, 0, &returned, NULL);
-}
-
-static void raw_detach_aio_context(BlockDriverState *bs)
-{
- BDRVRawState *s = bs->opaque;
-
- if (s->aio) {
- win32_aio_detach_aio_context(s->aio, bdrv_get_aio_context(bs));
- }
-}
-
-static void raw_attach_aio_context(BlockDriverState *bs,
- AioContext *new_context)
-{
- BDRVRawState *s = bs->opaque;
-
- if (s->aio) {
- win32_aio_attach_aio_context(s->aio, new_context);
- }
-}
-
-static void raw_probe_alignment(BlockDriverState *bs)
-{
- BDRVRawState *s = bs->opaque;
- DWORD sectorsPerCluster, freeClusters, totalClusters, count;
- DISK_GEOMETRY_EX dg;
- BOOL status;
-
- if (s->type == FTYPE_CD) {
- bs->request_alignment = 2048;
- return;
- }
- if (s->type == FTYPE_HARDDISK) {
- status = DeviceIoControl(s->hfile, IOCTL_DISK_GET_DRIVE_GEOMETRY_EX,
- NULL, 0, &dg, sizeof(dg), &count, NULL);
- if (status != 0) {
- bs->request_alignment = dg.Geometry.BytesPerSector;
- return;
- }
- /* try GetDiskFreeSpace too */
- }
-
- if (s->drive_path[0]) {
- GetDiskFreeSpace(s->drive_path, &sectorsPerCluster,
- &dg.Geometry.BytesPerSector,
- &freeClusters, &totalClusters);
- bs->request_alignment = dg.Geometry.BytesPerSector;
- }
-}
-
-static void raw_parse_flags(int flags, int *access_flags, DWORD *overlapped)
-{
- assert(access_flags != NULL);
- assert(overlapped != NULL);
-
- if (flags & BDRV_O_RDWR) {
- *access_flags = GENERIC_READ | GENERIC_WRITE;
- } else {
- *access_flags = GENERIC_READ;
- }
-
- *overlapped = FILE_ATTRIBUTE_NORMAL;
- if (flags & BDRV_O_NATIVE_AIO) {
- *overlapped |= FILE_FLAG_OVERLAPPED;
- }
- if (flags & BDRV_O_NOCACHE) {
- *overlapped |= FILE_FLAG_NO_BUFFERING;
- }
-}
-
-static void raw_parse_filename(const char *filename, QDict *options,
- Error **errp)
-{
- /* The filename does not have to be prefixed by the protocol name, since
- * "file" is the default protocol; therefore, the return value of this
- * function call can be ignored. */
- strstart(filename, "file:", &filename);
-
- qdict_put_obj(options, "filename", QOBJECT(qstring_from_str(filename)));
-}
-
-static QemuOptsList raw_runtime_opts = {
- .name = "raw",
- .head = QTAILQ_HEAD_INITIALIZER(raw_runtime_opts.head),
- .desc = {
- {
- .name = "filename",
- .type = QEMU_OPT_STRING,
- .help = "File name of the image",
- },
- { /* end of list */ }
- },
-};
-
-static int raw_open(BlockDriverState *bs, QDict *options, int flags,
- Error **errp)
-{
- BDRVRawState *s = bs->opaque;
- int access_flags;
- DWORD overlapped;
- QemuOpts *opts;
- Error *local_err = NULL;
- const char *filename;
- int ret;
-
- s->type = FTYPE_FILE;
-
- opts = qemu_opts_create(&raw_runtime_opts, NULL, 0, &error_abort);
- qemu_opts_absorb_qdict(opts, options, &local_err);
- if (local_err) {
- error_propagate(errp, local_err);
- ret = -EINVAL;
- goto fail;
- }
-
- filename = qemu_opt_get(opts, "filename");
-
- raw_parse_flags(flags, &access_flags, &overlapped);
-
- if (filename[0] && filename[1] == ':') {
- snprintf(s->drive_path, sizeof(s->drive_path), "%c:\\", filename[0]);
- } else if (filename[0] == '\\' && filename[1] == '\\') {
- s->drive_path[0] = 0;
- } else {
- /* Relative path. */
- char buf[MAX_PATH];
- GetCurrentDirectory(MAX_PATH, buf);
- snprintf(s->drive_path, sizeof(s->drive_path), "%c:\\", buf[0]);
- }
-
- s->hfile = CreateFile(filename, access_flags,
- FILE_SHARE_READ, NULL,
- OPEN_EXISTING, overlapped, NULL);
- if (s->hfile == INVALID_HANDLE_VALUE) {
- int err = GetLastError();
-
- if (err == ERROR_ACCESS_DENIED) {
- ret = -EACCES;
- } else {
- ret = -EINVAL;
- }
- goto fail;
- }
-
- if (flags & BDRV_O_NATIVE_AIO) {
- s->aio = win32_aio_init();
- if (s->aio == NULL) {
- CloseHandle(s->hfile);
- error_setg(errp, "Could not initialize AIO");
- ret = -EINVAL;
- goto fail;
- }
-
- ret = win32_aio_attach(s->aio, s->hfile);
- if (ret < 0) {
- win32_aio_cleanup(s->aio);
- CloseHandle(s->hfile);
- error_setg_errno(errp, -ret, "Could not enable AIO");
- goto fail;
- }
-
- win32_aio_attach_aio_context(s->aio, bdrv_get_aio_context(bs));
- }
-
- raw_probe_alignment(bs);
- ret = 0;
-fail:
- qemu_opts_del(opts);
- return ret;
-}
-
-static BlockAIOCB *raw_aio_readv(BlockDriverState *bs,
- int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
- BlockCompletionFunc *cb, void *opaque)
-{
- BDRVRawState *s = bs->opaque;
- if (s->aio) {
- return win32_aio_submit(bs, s->aio, s->hfile, sector_num, qiov,
- nb_sectors, cb, opaque, QEMU_AIO_READ);
- } else {
- return paio_submit(bs, s->hfile, sector_num, qiov, nb_sectors,
- cb, opaque, QEMU_AIO_READ);
- }
-}
-
-static BlockAIOCB *raw_aio_writev(BlockDriverState *bs,
- int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
- BlockCompletionFunc *cb, void *opaque)
-{
- BDRVRawState *s = bs->opaque;
- if (s->aio) {
- return win32_aio_submit(bs, s->aio, s->hfile, sector_num, qiov,
- nb_sectors, cb, opaque, QEMU_AIO_WRITE);
- } else {
- return paio_submit(bs, s->hfile, sector_num, qiov, nb_sectors,
- cb, opaque, QEMU_AIO_WRITE);
- }
-}
-
-static BlockAIOCB *raw_aio_flush(BlockDriverState *bs,
- BlockCompletionFunc *cb, void *opaque)
-{
- BDRVRawState *s = bs->opaque;
- return paio_submit(bs, s->hfile, 0, NULL, 0, cb, opaque, QEMU_AIO_FLUSH);
-}
-
-static void raw_close(BlockDriverState *bs)
-{
- BDRVRawState *s = bs->opaque;
-
- if (s->aio) {
- win32_aio_detach_aio_context(s->aio, bdrv_get_aio_context(bs));
- win32_aio_cleanup(s->aio);
- s->aio = NULL;
- }
-
- CloseHandle(s->hfile);
- if (bs->open_flags & BDRV_O_TEMPORARY) {
- unlink(bs->filename);
- }
-}
-
-static int raw_truncate(BlockDriverState *bs, int64_t offset)
-{
- BDRVRawState *s = bs->opaque;
- LONG low, high;
- DWORD dwPtrLow;
-
- low = offset;
- high = offset >> 32;
-
- /*
- * An error has occurred if the return value is INVALID_SET_FILE_POINTER
- * and GetLastError doesn't return NO_ERROR.
- */
- dwPtrLow = SetFilePointer(s->hfile, low, &high, FILE_BEGIN);
- if (dwPtrLow == INVALID_SET_FILE_POINTER && GetLastError() != NO_ERROR) {
- fprintf(stderr, "SetFilePointer error: %lu\n", GetLastError());
- return -EIO;
- }
- if (SetEndOfFile(s->hfile) == 0) {
- fprintf(stderr, "SetEndOfFile error: %lu\n", GetLastError());
- return -EIO;
- }
- return 0;
-}
-
-static int64_t raw_getlength(BlockDriverState *bs)
-{
- BDRVRawState *s = bs->opaque;
- LARGE_INTEGER l;
- ULARGE_INTEGER available, total, total_free;
- DISK_GEOMETRY_EX dg;
- DWORD count;
- BOOL status;
-
- switch(s->type) {
- case FTYPE_FILE:
- l.LowPart = GetFileSize(s->hfile, (PDWORD)&l.HighPart);
- if (l.LowPart == 0xffffffffUL && GetLastError() != NO_ERROR)
- return -EIO;
- break;
- case FTYPE_CD:
- if (!GetDiskFreeSpaceEx(s->drive_path, &available, &total, &total_free))
- return -EIO;
- l.QuadPart = total.QuadPart;
- break;
- case FTYPE_HARDDISK:
- status = DeviceIoControl(s->hfile, IOCTL_DISK_GET_DRIVE_GEOMETRY_EX,
- NULL, 0, &dg, sizeof(dg), &count, NULL);
- if (status != 0) {
- l = dg.DiskSize;
- }
- break;
- default:
- return -EIO;
- }
- return l.QuadPart;
-}
-
-static int64_t raw_get_allocated_file_size(BlockDriverState *bs)
-{
- typedef DWORD (WINAPI * get_compressed_t)(const char *filename,
- DWORD * high);
- get_compressed_t get_compressed;
- struct _stati64 st;
- const char *filename = bs->filename;
- /* WinNT support GetCompressedFileSize to determine allocate size */
- get_compressed =
- (get_compressed_t) GetProcAddress(GetModuleHandle("kernel32"),
- "GetCompressedFileSizeA");
- if (get_compressed) {
- DWORD high, low;
- low = get_compressed(filename, &high);
- if (low != 0xFFFFFFFFlu || GetLastError() == NO_ERROR) {
- return (((int64_t) high) << 32) + low;
- }
- }
-
- if (_stati64(filename, &st) < 0) {
- return -1;
- }
- return st.st_size;
-}
-
-static int raw_create(const char *filename, QemuOpts *opts, Error **errp)
-{
- int fd;
- int64_t total_size = 0;
-
- strstart(filename, "file:", &filename);
-
- /* Read out options */
- total_size = ROUND_UP(qemu_opt_get_size_del(opts, BLOCK_OPT_SIZE, 0),
- BDRV_SECTOR_SIZE);
-
- fd = qemu_open(filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY,
- 0644);
- if (fd < 0) {
- error_setg_errno(errp, errno, "Could not create file");
- return -EIO;
- }
- set_sparse(fd);
- ftruncate(fd, total_size);
- qemu_close(fd);
- return 0;
-}
-
-
-static QemuOptsList raw_create_opts = {
- .name = "raw-create-opts",
- .head = QTAILQ_HEAD_INITIALIZER(raw_create_opts.head),
- .desc = {
- {
- .name = BLOCK_OPT_SIZE,
- .type = QEMU_OPT_SIZE,
- .help = "Virtual disk size"
- },
- { /* end of list */ }
- }
-};
-
-BlockDriver bdrv_file = {
- .format_name = "file",
- .protocol_name = "file",
- .instance_size = sizeof(BDRVRawState),
- .bdrv_needs_filename = true,
- .bdrv_parse_filename = raw_parse_filename,
- .bdrv_file_open = raw_open,
- .bdrv_close = raw_close,
- .bdrv_create = raw_create,
- .bdrv_has_zero_init = bdrv_has_zero_init_1,
-
- .bdrv_aio_readv = raw_aio_readv,
- .bdrv_aio_writev = raw_aio_writev,
- .bdrv_aio_flush = raw_aio_flush,
-
- .bdrv_truncate = raw_truncate,
- .bdrv_getlength = raw_getlength,
- .bdrv_get_allocated_file_size
- = raw_get_allocated_file_size,
-
- .create_opts = &raw_create_opts,
-};
-
-/***********************************************/
-/* host device */
-
-static int find_cdrom(char *cdrom_name, int cdrom_name_size)
-{
- char drives[256], *pdrv = drives;
- UINT type;
-
- memset(drives, 0, sizeof(drives));
- GetLogicalDriveStrings(sizeof(drives), drives);
- while(pdrv[0] != '\0') {
- type = GetDriveType(pdrv);
- switch(type) {
- case DRIVE_CDROM:
- snprintf(cdrom_name, cdrom_name_size, "\\\\.\\%c:", pdrv[0]);
- return 0;
- break;
- }
- pdrv += lstrlen(pdrv) + 1;
- }
- return -1;
-}
-
-static int find_device_type(BlockDriverState *bs, const char *filename)
-{
- BDRVRawState *s = bs->opaque;
- UINT type;
- const char *p;
-
- if (strstart(filename, "\\\\.\\", &p) ||
- strstart(filename, "//./", &p)) {
- if (stristart(p, "PhysicalDrive", NULL))
- return FTYPE_HARDDISK;
- snprintf(s->drive_path, sizeof(s->drive_path), "%c:\\", p[0]);
- type = GetDriveType(s->drive_path);
- switch (type) {
- case DRIVE_REMOVABLE:
- case DRIVE_FIXED:
- return FTYPE_HARDDISK;
- case DRIVE_CDROM:
- return FTYPE_CD;
- default:
- return FTYPE_FILE;
- }
- } else {
- return FTYPE_FILE;
- }
-}
-
-static int hdev_probe_device(const char *filename)
-{
- if (strstart(filename, "/dev/cdrom", NULL))
- return 100;
- if (is_windows_drive(filename))
- return 100;
- return 0;
-}
-
-static void hdev_parse_filename(const char *filename, QDict *options,
- Error **errp)
-{
- /* The prefix is optional, just as for "file". */
- strstart(filename, "host_device:", &filename);
-
- qdict_put_obj(options, "filename", QOBJECT(qstring_from_str(filename)));
-}
-
-static int hdev_open(BlockDriverState *bs, QDict *options, int flags,
- Error **errp)
-{
- BDRVRawState *s = bs->opaque;
- int access_flags, create_flags;
- int ret = 0;
- DWORD overlapped;
- char device_name[64];
-
- Error *local_err = NULL;
- const char *filename;
-
- QemuOpts *opts = qemu_opts_create(&raw_runtime_opts, NULL, 0,
- &error_abort);
- qemu_opts_absorb_qdict(opts, options, &local_err);
- if (local_err) {
- error_propagate(errp, local_err);
- ret = -EINVAL;
- goto done;
- }
-
- filename = qemu_opt_get(opts, "filename");
-
- if (strstart(filename, "/dev/cdrom", NULL)) {
- if (find_cdrom(device_name, sizeof(device_name)) < 0) {
- error_setg(errp, "Could not open CD-ROM drive");
- ret = -ENOENT;
- goto done;
- }
- filename = device_name;
- } else {
- /* transform drive letters into device name */
- if (((filename[0] >= 'a' && filename[0] <= 'z') ||
- (filename[0] >= 'A' && filename[0] <= 'Z')) &&
- filename[1] == ':' && filename[2] == '\0') {
- snprintf(device_name, sizeof(device_name), "\\\\.\\%c:", filename[0]);
- filename = device_name;
- }
- }
- s->type = find_device_type(bs, filename);
-
- raw_parse_flags(flags, &access_flags, &overlapped);
-
- create_flags = OPEN_EXISTING;
-
- s->hfile = CreateFile(filename, access_flags,
- FILE_SHARE_READ, NULL,
- create_flags, overlapped, NULL);
- if (s->hfile == INVALID_HANDLE_VALUE) {
- int err = GetLastError();
-
- if (err == ERROR_ACCESS_DENIED) {
- ret = -EACCES;
- } else {
- ret = -EINVAL;
- }
- error_setg_errno(errp, -ret, "Could not open device");
- goto done;
- }
-
-done:
- qemu_opts_del(opts);
- return ret;
-}
-
-static BlockDriver bdrv_host_device = {
- .format_name = "host_device",
- .protocol_name = "host_device",
- .instance_size = sizeof(BDRVRawState),
- .bdrv_needs_filename = true,
- .bdrv_parse_filename = hdev_parse_filename,
- .bdrv_probe_device = hdev_probe_device,
- .bdrv_file_open = hdev_open,
- .bdrv_close = raw_close,
-
- .bdrv_aio_readv = raw_aio_readv,
- .bdrv_aio_writev = raw_aio_writev,
- .bdrv_aio_flush = raw_aio_flush,
-
- .bdrv_detach_aio_context = raw_detach_aio_context,
- .bdrv_attach_aio_context = raw_attach_aio_context,
-
- .bdrv_getlength = raw_getlength,
- .has_variable_length = true,
-
- .bdrv_get_allocated_file_size
- = raw_get_allocated_file_size,
-};
-
-static void bdrv_file_init(void)
-{
- bdrv_register(&bdrv_file);
- bdrv_register(&bdrv_host_device);
-}
-
-block_init(bdrv_file_init);