diff options
Diffstat (limited to 'qemu/block/raw-win32.c')
-rw-r--r-- | qemu/block/raw-win32.c | 731 |
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, §orsPerCluster, - &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); |