S: Supported
F: block/linux-aio.c
F: include/block/raw-aio.h
-F: block/raw-posix.c
-F: block/raw-win32.c
F: block/raw-format.c
+F: block/file-posix.c
+F: block/file-win32.c
F: block/win32-aio.c
qcow2
block-obj-y += quorum.o
block-obj-y += parallels.o blkdebug.o blkverify.o blkreplay.o
block-obj-y += block-backend.o snapshot.o qapi.o
-block-obj-$(CONFIG_WIN32) += raw-win32.o win32-aio.o
-block-obj-$(CONFIG_POSIX) += raw-posix.o
+block-obj-$(CONFIG_WIN32) += file-win32.o win32-aio.o
+block-obj-$(CONFIG_POSIX) += file-posix.o
block-obj-$(CONFIG_LINUX_AIO) += linux-aio.o
block-obj-y += null.o mirror.o commit.o io.o
block-obj-y += throttle-groups.o
--- /dev/null
+/*
+ * Block driver for RAW files (posix)
+ *
+ * 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/error-report.h"
+#include "qemu/timer.h"
+#include "qemu/log.h"
+#include "block/block_int.h"
+#include "qemu/module.h"
+#include "trace.h"
+#include "block/thread-pool.h"
+#include "qemu/iov.h"
+#include "block/raw-aio.h"
+#include "qapi/util.h"
+#include "qapi/qmp/qstring.h"
+
+#if defined(__APPLE__) && (__MACH__)
+#include <paths.h>
+#include <sys/param.h>
+#include <IOKit/IOKitLib.h>
+#include <IOKit/IOBSD.h>
+#include <IOKit/storage/IOMediaBSDClient.h>
+#include <IOKit/storage/IOMedia.h>
+#include <IOKit/storage/IOCDMedia.h>
+//#include <IOKit/storage/IOCDTypes.h>
+#include <IOKit/storage/IODVDMedia.h>
+#include <CoreFoundation/CoreFoundation.h>
+#endif
+
+#ifdef __sun__
+#define _POSIX_PTHREAD_SEMANTICS 1
+#include <sys/dkio.h>
+#endif
+#ifdef __linux__
+#include <sys/ioctl.h>
+#include <sys/param.h>
+#include <linux/cdrom.h>
+#include <linux/fd.h>
+#include <linux/fs.h>
+#include <linux/hdreg.h>
+#include <scsi/sg.h>
+#ifdef __s390__
+#include <asm/dasd.h>
+#endif
+#ifndef FS_NOCOW_FL
+#define FS_NOCOW_FL 0x00800000 /* Do not cow file */
+#endif
+#endif
+#if defined(CONFIG_FALLOCATE_PUNCH_HOLE) || defined(CONFIG_FALLOCATE_ZERO_RANGE)
+#include <linux/falloc.h>
+#endif
+#if defined (__FreeBSD__) || defined(__FreeBSD_kernel__)
+#include <sys/disk.h>
+#include <sys/cdio.h>
+#endif
+
+#ifdef __OpenBSD__
+#include <sys/ioctl.h>
+#include <sys/disklabel.h>
+#include <sys/dkio.h>
+#endif
+
+#ifdef __NetBSD__
+#include <sys/ioctl.h>
+#include <sys/disklabel.h>
+#include <sys/dkio.h>
+#include <sys/disk.h>
+#endif
+
+#ifdef __DragonFly__
+#include <sys/ioctl.h>
+#include <sys/diskslice.h>
+#endif
+
+#ifdef CONFIG_XFS
+#include <xfs/xfs.h>
+#endif
+
+//#define DEBUG_BLOCK
+
+#ifdef DEBUG_BLOCK
+# define DEBUG_BLOCK_PRINT 1
+#else
+# define DEBUG_BLOCK_PRINT 0
+#endif
+#define DPRINTF(fmt, ...) \
+do { \
+ if (DEBUG_BLOCK_PRINT) { \
+ printf(fmt, ## __VA_ARGS__); \
+ } \
+} while (0)
+
+/* OS X does not have O_DSYNC */
+#ifndef O_DSYNC
+#ifdef O_SYNC
+#define O_DSYNC O_SYNC
+#elif defined(O_FSYNC)
+#define O_DSYNC O_FSYNC
+#endif
+#endif
+
+/* Approximate O_DIRECT with O_DSYNC if O_DIRECT isn't available */
+#ifndef O_DIRECT
+#define O_DIRECT O_DSYNC
+#endif
+
+#define FTYPE_FILE 0
+#define FTYPE_CD 1
+
+#define MAX_BLOCKSIZE 4096
+
+typedef struct BDRVRawState {
+ int fd;
+ int type;
+ int open_flags;
+ size_t buf_align;
+
+#ifdef CONFIG_XFS
+ bool is_xfs:1;
+#endif
+ bool has_discard:1;
+ bool has_write_zeroes:1;
+ bool discard_zeroes:1;
+ bool use_linux_aio:1;
+ bool has_fallocate;
+ bool needs_alignment;
+} BDRVRawState;
+
+typedef struct BDRVRawReopenState {
+ int fd;
+ int open_flags;
+} BDRVRawReopenState;
+
+static int fd_open(BlockDriverState *bs);
+static int64_t raw_getlength(BlockDriverState *bs);
+
+typedef struct RawPosixAIOData {
+ BlockDriverState *bs;
+ int aio_fildes;
+ union {
+ struct iovec *aio_iov;
+ void *aio_ioctl_buf;
+ };
+ int aio_niov;
+ uint64_t aio_nbytes;
+#define aio_ioctl_cmd aio_nbytes /* for QEMU_AIO_IOCTL */
+ off_t aio_offset;
+ int aio_type;
+} RawPosixAIOData;
+
+#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
+static int cdrom_reopen(BlockDriverState *bs);
+#endif
+
+#if defined(__NetBSD__)
+static int raw_normalize_devicepath(const char **filename)
+{
+ static char namebuf[PATH_MAX];
+ const char *dp, *fname;
+ struct stat sb;
+
+ fname = *filename;
+ dp = strrchr(fname, '/');
+ if (lstat(fname, &sb) < 0) {
+ fprintf(stderr, "%s: stat failed: %s\n",
+ fname, strerror(errno));
+ return -errno;
+ }
+
+ if (!S_ISBLK(sb.st_mode)) {
+ return 0;
+ }
+
+ if (dp == NULL) {
+ snprintf(namebuf, PATH_MAX, "r%s", fname);
+ } else {
+ snprintf(namebuf, PATH_MAX, "%.*s/r%s",
+ (int)(dp - fname), fname, dp + 1);
+ }
+ fprintf(stderr, "%s is a block device", fname);
+ *filename = namebuf;
+ fprintf(stderr, ", using %s\n", *filename);
+
+ return 0;
+}
+#else
+static int raw_normalize_devicepath(const char **filename)
+{
+ return 0;
+}
+#endif
+
+/*
+ * Get logical block size via ioctl. On success store it in @sector_size_p.
+ */
+static int probe_logical_blocksize(int fd, unsigned int *sector_size_p)
+{
+ unsigned int sector_size;
+ bool success = false;
+
+ errno = ENOTSUP;
+
+ /* Try a few ioctls to get the right size */
+#ifdef BLKSSZGET
+ if (ioctl(fd, BLKSSZGET, §or_size) >= 0) {
+ *sector_size_p = sector_size;
+ success = true;
+ }
+#endif
+#ifdef DKIOCGETBLOCKSIZE
+ if (ioctl(fd, DKIOCGETBLOCKSIZE, §or_size) >= 0) {
+ *sector_size_p = sector_size;
+ success = true;
+ }
+#endif
+#ifdef DIOCGSECTORSIZE
+ if (ioctl(fd, DIOCGSECTORSIZE, §or_size) >= 0) {
+ *sector_size_p = sector_size;
+ success = true;
+ }
+#endif
+
+ return success ? 0 : -errno;
+}
+
+/**
+ * Get physical block size of @fd.
+ * On success, store it in @blk_size and return 0.
+ * On failure, return -errno.
+ */
+static int probe_physical_blocksize(int fd, unsigned int *blk_size)
+{
+#ifdef BLKPBSZGET
+ if (ioctl(fd, BLKPBSZGET, blk_size) < 0) {
+ return -errno;
+ }
+ return 0;
+#else
+ return -ENOTSUP;
+#endif
+}
+
+/* Check if read is allowed with given memory buffer and length.
+ *
+ * This function is used to check O_DIRECT memory buffer and request alignment.
+ */
+static bool raw_is_io_aligned(int fd, void *buf, size_t len)
+{
+ ssize_t ret = pread(fd, buf, len, 0);
+
+ if (ret >= 0) {
+ return true;
+ }
+
+#ifdef __linux__
+ /* The Linux kernel returns EINVAL for misaligned O_DIRECT reads. Ignore
+ * other errors (e.g. real I/O error), which could happen on a failed
+ * drive, since we only care about probing alignment.
+ */
+ if (errno != EINVAL) {
+ return true;
+ }
+#endif
+
+ return false;
+}
+
+static void raw_probe_alignment(BlockDriverState *bs, int fd, Error **errp)
+{
+ BDRVRawState *s = bs->opaque;
+ char *buf;
+ size_t max_align = MAX(MAX_BLOCKSIZE, getpagesize());
+
+ /* For SCSI generic devices the alignment is not really used.
+ With buffered I/O, we don't have any restrictions. */
+ if (bdrv_is_sg(bs) || !s->needs_alignment) {
+ bs->bl.request_alignment = 1;
+ s->buf_align = 1;
+ return;
+ }
+
+ bs->bl.request_alignment = 0;
+ s->buf_align = 0;
+ /* Let's try to use the logical blocksize for the alignment. */
+ if (probe_logical_blocksize(fd, &bs->bl.request_alignment) < 0) {
+ bs->bl.request_alignment = 0;
+ }
+#ifdef CONFIG_XFS
+ if (s->is_xfs) {
+ struct dioattr da;
+ if (xfsctl(NULL, fd, XFS_IOC_DIOINFO, &da) >= 0) {
+ bs->bl.request_alignment = da.d_miniosz;
+ /* The kernel returns wrong information for d_mem */
+ /* s->buf_align = da.d_mem; */
+ }
+ }
+#endif
+
+ /* If we could not get the sizes so far, we can only guess them */
+ if (!s->buf_align) {
+ size_t align;
+ buf = qemu_memalign(max_align, 2 * max_align);
+ for (align = 512; align <= max_align; align <<= 1) {
+ if (raw_is_io_aligned(fd, buf + align, max_align)) {
+ s->buf_align = align;
+ break;
+ }
+ }
+ qemu_vfree(buf);
+ }
+
+ if (!bs->bl.request_alignment) {
+ size_t align;
+ buf = qemu_memalign(s->buf_align, max_align);
+ for (align = 512; align <= max_align; align <<= 1) {
+ if (raw_is_io_aligned(fd, buf, align)) {
+ bs->bl.request_alignment = align;
+ break;
+ }
+ }
+ qemu_vfree(buf);
+ }
+
+ if (!s->buf_align || !bs->bl.request_alignment) {
+ error_setg(errp, "Could not find working O_DIRECT alignment");
+ error_append_hint(errp, "Try cache.direct=off\n");
+ }
+}
+
+static void raw_parse_flags(int bdrv_flags, int *open_flags)
+{
+ assert(open_flags != NULL);
+
+ *open_flags |= O_BINARY;
+ *open_flags &= ~O_ACCMODE;
+ if (bdrv_flags & BDRV_O_RDWR) {
+ *open_flags |= O_RDWR;
+ } else {
+ *open_flags |= O_RDONLY;
+ }
+
+ /* Use O_DSYNC for write-through caching, no flags for write-back caching,
+ * and O_DIRECT for no caching. */
+ if ((bdrv_flags & BDRV_O_NOCACHE)) {
+ *open_flags |= O_DIRECT;
+ }
+}
+
+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",
+ },
+ {
+ .name = "aio",
+ .type = QEMU_OPT_STRING,
+ .help = "host AIO implementation (threads, native)",
+ },
+ { /* end of list */ }
+ },
+};
+
+static int raw_open_common(BlockDriverState *bs, QDict *options,
+ int bdrv_flags, int open_flags, Error **errp)
+{
+ BDRVRawState *s = bs->opaque;
+ QemuOpts *opts;
+ Error *local_err = NULL;
+ const char *filename = NULL;
+ BlockdevAioOptions aio, aio_default;
+ int fd, ret;
+ struct stat st;
+
+ 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");
+
+ ret = raw_normalize_devicepath(&filename);
+ if (ret != 0) {
+ error_setg_errno(errp, -ret, "Could not normalize device path");
+ goto fail;
+ }
+
+ aio_default = (bdrv_flags & BDRV_O_NATIVE_AIO)
+ ? BLOCKDEV_AIO_OPTIONS_NATIVE
+ : BLOCKDEV_AIO_OPTIONS_THREADS;
+ aio = qapi_enum_parse(BlockdevAioOptions_lookup, qemu_opt_get(opts, "aio"),
+ BLOCKDEV_AIO_OPTIONS__MAX, aio_default, &local_err);
+ if (local_err) {
+ error_propagate(errp, local_err);
+ ret = -EINVAL;
+ goto fail;
+ }
+ s->use_linux_aio = (aio == BLOCKDEV_AIO_OPTIONS_NATIVE);
+
+ s->open_flags = open_flags;
+ raw_parse_flags(bdrv_flags, &s->open_flags);
+
+ s->fd = -1;
+ fd = qemu_open(filename, s->open_flags, 0644);
+ if (fd < 0) {
+ ret = -errno;
+ error_setg_errno(errp, errno, "Could not open '%s'", filename);
+ if (ret == -EROFS) {
+ ret = -EACCES;
+ }
+ goto fail;
+ }
+ s->fd = fd;
+
+#ifdef CONFIG_LINUX_AIO
+ /* Currently Linux does AIO only for files opened with O_DIRECT */
+ if (s->use_linux_aio && !(s->open_flags & O_DIRECT)) {
+ error_setg(errp, "aio=native was specified, but it requires "
+ "cache.direct=on, which was not specified.");
+ ret = -EINVAL;
+ goto fail;
+ }
+#else
+ if (s->use_linux_aio) {
+ error_setg(errp, "aio=native was specified, but is not supported "
+ "in this build.");
+ ret = -EINVAL;
+ goto fail;
+ }
+#endif /* !defined(CONFIG_LINUX_AIO) */
+
+ s->has_discard = true;
+ s->has_write_zeroes = true;
+ bs->supported_zero_flags = BDRV_REQ_MAY_UNMAP;
+ if ((bs->open_flags & BDRV_O_NOCACHE) != 0) {
+ s->needs_alignment = true;
+ }
+
+ if (fstat(s->fd, &st) < 0) {
+ ret = -errno;
+ error_setg_errno(errp, errno, "Could not stat file");
+ goto fail;
+ }
+ if (S_ISREG(st.st_mode)) {
+ s->discard_zeroes = true;
+ s->has_fallocate = true;
+ }
+ if (S_ISBLK(st.st_mode)) {
+#ifdef BLKDISCARDZEROES
+ unsigned int arg;
+ if (ioctl(s->fd, BLKDISCARDZEROES, &arg) == 0 && arg) {
+ s->discard_zeroes = true;
+ }
+#endif
+#ifdef __linux__
+ /* On Linux 3.10, BLKDISCARD leaves stale data in the page cache. Do
+ * not rely on the contents of discarded blocks unless using O_DIRECT.
+ * Same for BLKZEROOUT.
+ */
+ if (!(bs->open_flags & BDRV_O_NOCACHE)) {
+ s->discard_zeroes = false;
+ s->has_write_zeroes = false;
+ }
+#endif
+ }
+#ifdef __FreeBSD__
+ if (S_ISCHR(st.st_mode)) {
+ /*
+ * The file is a char device (disk), which on FreeBSD isn't behind
+ * a pager, so force all requests to be aligned. This is needed
+ * so QEMU makes sure all IO operations on the device are aligned
+ * to sector size, or else FreeBSD will reject them with EINVAL.
+ */
+ s->needs_alignment = true;
+ }
+#endif
+
+#ifdef CONFIG_XFS
+ if (platform_test_xfs_fd(s->fd)) {
+ s->is_xfs = true;
+ }
+#endif
+
+ ret = 0;
+fail:
+ if (filename && (bdrv_flags & BDRV_O_TEMPORARY)) {
+ unlink(filename);
+ }
+ qemu_opts_del(opts);
+ return ret;
+}
+
+static int raw_open(BlockDriverState *bs, QDict *options, int flags,
+ Error **errp)
+{
+ BDRVRawState *s = bs->opaque;
+
+ s->type = FTYPE_FILE;
+ return raw_open_common(bs, options, flags, 0, errp);
+}
+
+static int raw_reopen_prepare(BDRVReopenState *state,
+ BlockReopenQueue *queue, Error **errp)
+{
+ BDRVRawState *s;
+ BDRVRawReopenState *rs;
+ int ret = 0;
+ Error *local_err = NULL;
+
+ assert(state != NULL);
+ assert(state->bs != NULL);
+
+ s = state->bs->opaque;
+
+ state->opaque = g_new0(BDRVRawReopenState, 1);
+ rs = state->opaque;
+
+ if (s->type == FTYPE_CD) {
+ rs->open_flags |= O_NONBLOCK;
+ }
+
+ raw_parse_flags(state->flags, &rs->open_flags);
+
+ rs->fd = -1;
+
+ int fcntl_flags = O_APPEND | O_NONBLOCK;
+#ifdef O_NOATIME
+ fcntl_flags |= O_NOATIME;
+#endif
+
+#ifdef O_ASYNC
+ /* Not all operating systems have O_ASYNC, and those that don't
+ * will not let us track the state into rs->open_flags (typically
+ * you achieve the same effect with an ioctl, for example I_SETSIG
+ * on Solaris). But we do not use O_ASYNC, so that's fine.
+ */
+ assert((s->open_flags & O_ASYNC) == 0);
+#endif
+
+ if ((rs->open_flags & ~fcntl_flags) == (s->open_flags & ~fcntl_flags)) {
+ /* dup the original fd */
+ rs->fd = qemu_dup(s->fd);
+ if (rs->fd >= 0) {
+ ret = fcntl_setfl(rs->fd, rs->open_flags);
+ if (ret) {
+ qemu_close(rs->fd);
+ rs->fd = -1;
+ }
+ }
+ }
+
+ /* If we cannot use fcntl, or fcntl failed, fall back to qemu_open() */
+ if (rs->fd == -1) {
+ const char *normalized_filename = state->bs->filename;
+ ret = raw_normalize_devicepath(&normalized_filename);
+ if (ret < 0) {
+ error_setg_errno(errp, -ret, "Could not normalize device path");
+ } else {
+ assert(!(rs->open_flags & O_CREAT));
+ rs->fd = qemu_open(normalized_filename, rs->open_flags);
+ if (rs->fd == -1) {
+ error_setg_errno(errp, errno, "Could not reopen file");
+ ret = -1;
+ }
+ }
+ }
+
+ /* Fail already reopen_prepare() if we can't get a working O_DIRECT
+ * alignment with the new fd. */
+ if (rs->fd != -1) {
+ raw_probe_alignment(state->bs, rs->fd, &local_err);
+ if (local_err) {
+ qemu_close(rs->fd);
+ rs->fd = -1;
+ error_propagate(errp, local_err);
+ ret = -EINVAL;
+ }
+ }
+
+ return ret;
+}
+
+static void raw_reopen_commit(BDRVReopenState *state)
+{
+ BDRVRawReopenState *rs = state->opaque;
+ BDRVRawState *s = state->bs->opaque;
+
+ s->open_flags = rs->open_flags;
+
+ qemu_close(s->fd);
+ s->fd = rs->fd;
+
+ g_free(state->opaque);
+ state->opaque = NULL;
+}
+
+
+static void raw_reopen_abort(BDRVReopenState *state)
+{
+ BDRVRawReopenState *rs = state->opaque;
+
+ /* nothing to do if NULL, we didn't get far enough */
+ if (rs == NULL) {
+ return;
+ }
+
+ if (rs->fd >= 0) {
+ qemu_close(rs->fd);
+ rs->fd = -1;
+ }
+ g_free(state->opaque);
+ state->opaque = NULL;
+}
+
+static int hdev_get_max_transfer_length(int fd)
+{
+#ifdef BLKSECTGET
+ int max_sectors = 0;
+ if (ioctl(fd, BLKSECTGET, &max_sectors) == 0) {
+ return max_sectors;
+ } else {
+ return -errno;
+ }
+#else
+ return -ENOSYS;
+#endif
+}
+
+static void raw_refresh_limits(BlockDriverState *bs, Error **errp)
+{
+ BDRVRawState *s = bs->opaque;
+ struct stat st;
+
+ if (!fstat(s->fd, &st)) {
+ if (S_ISBLK(st.st_mode)) {
+ int ret = hdev_get_max_transfer_length(s->fd);
+ if (ret > 0 && ret <= BDRV_REQUEST_MAX_SECTORS) {
+ bs->bl.max_transfer = pow2floor(ret << BDRV_SECTOR_BITS);
+ }
+ }
+ }
+
+ raw_probe_alignment(bs, s->fd, errp);
+ bs->bl.min_mem_alignment = s->buf_align;
+ bs->bl.opt_mem_alignment = MAX(s->buf_align, getpagesize());
+}
+
+static int check_for_dasd(int fd)
+{
+#ifdef BIODASDINFO2
+ struct dasd_information2_t info = {0};
+
+ return ioctl(fd, BIODASDINFO2, &info);
+#else
+ return -1;
+#endif
+}
+
+/**
+ * Try to get @bs's logical and physical block size.
+ * On success, store them in @bsz and return zero.
+ * On failure, return negative errno.
+ */
+static int hdev_probe_blocksizes(BlockDriverState *bs, BlockSizes *bsz)
+{
+ BDRVRawState *s = bs->opaque;
+ int ret;
+
+ /* If DASD, get blocksizes */
+ if (check_for_dasd(s->fd) < 0) {
+ return -ENOTSUP;
+ }
+ ret = probe_logical_blocksize(s->fd, &bsz->log);
+ if (ret < 0) {
+ return ret;
+ }
+ return probe_physical_blocksize(s->fd, &bsz->phys);
+}
+
+/**
+ * Try to get @bs's geometry: cyls, heads, sectors.
+ * On success, store them in @geo and return 0.
+ * On failure return -errno.
+ * (Allows block driver to assign default geometry values that guest sees)
+ */
+#ifdef __linux__
+static int hdev_probe_geometry(BlockDriverState *bs, HDGeometry *geo)
+{
+ BDRVRawState *s = bs->opaque;
+ struct hd_geometry ioctl_geo = {0};
+
+ /* If DASD, get its geometry */
+ if (check_for_dasd(s->fd) < 0) {
+ return -ENOTSUP;
+ }
+ if (ioctl(s->fd, HDIO_GETGEO, &ioctl_geo) < 0) {
+ return -errno;
+ }
+ /* HDIO_GETGEO may return success even though geo contains zeros
+ (e.g. certain multipath setups) */
+ if (!ioctl_geo.heads || !ioctl_geo.sectors || !ioctl_geo.cylinders) {
+ return -ENOTSUP;
+ }
+ /* Do not return a geometry for partition */
+ if (ioctl_geo.start != 0) {
+ return -ENOTSUP;
+ }
+ geo->heads = ioctl_geo.heads;
+ geo->sectors = ioctl_geo.sectors;
+ geo->cylinders = ioctl_geo.cylinders;
+
+ return 0;
+}
+#else /* __linux__ */
+static int hdev_probe_geometry(BlockDriverState *bs, HDGeometry *geo)
+{
+ return -ENOTSUP;
+}
+#endif
+
+static ssize_t handle_aiocb_ioctl(RawPosixAIOData *aiocb)
+{
+ int ret;
+
+ ret = ioctl(aiocb->aio_fildes, aiocb->aio_ioctl_cmd, aiocb->aio_ioctl_buf);
+ if (ret == -1) {
+ return -errno;
+ }
+
+ return 0;
+}
+
+static ssize_t handle_aiocb_flush(RawPosixAIOData *aiocb)
+{
+ int ret;
+
+ ret = qemu_fdatasync(aiocb->aio_fildes);
+ if (ret == -1) {
+ return -errno;
+ }
+ return 0;
+}
+
+#ifdef CONFIG_PREADV
+
+static bool preadv_present = true;
+
+static ssize_t
+qemu_preadv(int fd, const struct iovec *iov, int nr_iov, off_t offset)
+{
+ return preadv(fd, iov, nr_iov, offset);
+}
+
+static ssize_t
+qemu_pwritev(int fd, const struct iovec *iov, int nr_iov, off_t offset)
+{
+ return pwritev(fd, iov, nr_iov, offset);
+}
+
+#else
+
+static bool preadv_present = false;
+
+static ssize_t
+qemu_preadv(int fd, const struct iovec *iov, int nr_iov, off_t offset)
+{
+ return -ENOSYS;
+}
+
+static ssize_t
+qemu_pwritev(int fd, const struct iovec *iov, int nr_iov, off_t offset)
+{
+ return -ENOSYS;
+}
+
+#endif
+
+static ssize_t handle_aiocb_rw_vector(RawPosixAIOData *aiocb)
+{
+ ssize_t len;
+
+ do {
+ if (aiocb->aio_type & QEMU_AIO_WRITE)
+ len = qemu_pwritev(aiocb->aio_fildes,
+ aiocb->aio_iov,
+ aiocb->aio_niov,
+ aiocb->aio_offset);
+ else
+ len = qemu_preadv(aiocb->aio_fildes,
+ aiocb->aio_iov,
+ aiocb->aio_niov,
+ aiocb->aio_offset);
+ } while (len == -1 && errno == EINTR);
+
+ if (len == -1) {
+ return -errno;
+ }
+ return len;
+}
+
+/*
+ * 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 ssize_t handle_aiocb_rw_linear(RawPosixAIOData *aiocb, char *buf)
+{
+ ssize_t offset = 0;
+ ssize_t len;
+
+ while (offset < aiocb->aio_nbytes) {
+ if (aiocb->aio_type & QEMU_AIO_WRITE) {
+ len = pwrite(aiocb->aio_fildes,
+ (const char *)buf + offset,
+ aiocb->aio_nbytes - offset,
+ aiocb->aio_offset + offset);
+ } else {
+ len = pread(aiocb->aio_fildes,
+ buf + offset,
+ aiocb->aio_nbytes - offset,
+ aiocb->aio_offset + offset);
+ }
+ if (len == -1 && errno == EINTR) {
+ continue;
+ } else if (len == -1 && errno == EINVAL &&
+ (aiocb->bs->open_flags & BDRV_O_NOCACHE) &&
+ !(aiocb->aio_type & QEMU_AIO_WRITE) &&
+ offset > 0) {
+ /* O_DIRECT pread() may fail with EINVAL when offset is unaligned
+ * after a short read. Assume that O_DIRECT short reads only occur
+ * at EOF. Therefore this is a short read, not an I/O error.
+ */
+ break;
+ } else if (len == -1) {
+ offset = -errno;
+ break;
+ } else if (len == 0) {
+ break;
+ }
+ offset += len;
+ }
+
+ return offset;
+}
+
+static ssize_t handle_aiocb_rw(RawPosixAIOData *aiocb)
+{
+ ssize_t nbytes;
+ char *buf;
+
+ if (!(aiocb->aio_type & QEMU_AIO_MISALIGNED)) {
+ /*
+ * If there is just a single buffer, and it is properly aligned
+ * we can just use plain pread/pwrite without any problems.
+ */
+ if (aiocb->aio_niov == 1) {
+ return handle_aiocb_rw_linear(aiocb, aiocb->aio_iov->iov_base);
+ }
+ /*
+ * We have more than one iovec, and all are properly aligned.
+ *
+ * Try preadv/pwritev first and fall back to linearizing the
+ * buffer if it's not supported.
+ */
+ if (preadv_present) {
+ nbytes = handle_aiocb_rw_vector(aiocb);
+ if (nbytes == aiocb->aio_nbytes ||
+ (nbytes < 0 && nbytes != -ENOSYS)) {
+ return nbytes;
+ }
+ preadv_present = false;
+ }
+
+ /*
+ * XXX(hch): short read/write. no easy way to handle the reminder
+ * using these interfaces. For now retry using plain
+ * pread/pwrite?
+ */
+ }
+
+ /*
+ * Ok, we have to do it the hard way, copy all segments into
+ * a single aligned buffer.
+ */
+ buf = qemu_try_blockalign(aiocb->bs, aiocb->aio_nbytes);
+ if (buf == NULL) {
+ return -ENOMEM;
+ }
+
+ if (aiocb->aio_type & QEMU_AIO_WRITE) {
+ char *p = buf;
+ int i;
+
+ for (i = 0; i < aiocb->aio_niov; ++i) {
+ memcpy(p, aiocb->aio_iov[i].iov_base, aiocb->aio_iov[i].iov_len);
+ p += aiocb->aio_iov[i].iov_len;
+ }
+ assert(p - buf == aiocb->aio_nbytes);
+ }
+
+ nbytes = handle_aiocb_rw_linear(aiocb, buf);
+ if (!(aiocb->aio_type & QEMU_AIO_WRITE)) {
+ char *p = buf;
+ size_t count = aiocb->aio_nbytes, copy;
+ int i;
+
+ for (i = 0; i < aiocb->aio_niov && count; ++i) {
+ copy = count;
+ if (copy > aiocb->aio_iov[i].iov_len) {
+ copy = aiocb->aio_iov[i].iov_len;
+ }
+ memcpy(aiocb->aio_iov[i].iov_base, p, copy);
+ assert(count >= copy);
+ p += copy;
+ count -= copy;
+ }
+ assert(count == 0);
+ }
+ qemu_vfree(buf);
+
+ return nbytes;
+}
+
+#ifdef CONFIG_XFS
+static int xfs_write_zeroes(BDRVRawState *s, int64_t offset, uint64_t bytes)
+{
+ struct xfs_flock64 fl;
+ int err;
+
+ memset(&fl, 0, sizeof(fl));
+ fl.l_whence = SEEK_SET;
+ fl.l_start = offset;
+ fl.l_len = bytes;
+
+ if (xfsctl(NULL, s->fd, XFS_IOC_ZERO_RANGE, &fl) < 0) {
+ err = errno;
+ DPRINTF("cannot write zero range (%s)\n", strerror(errno));
+ return -err;
+ }
+
+ return 0;
+}
+
+static int xfs_discard(BDRVRawState *s, int64_t offset, uint64_t bytes)
+{
+ struct xfs_flock64 fl;
+ int err;
+
+ memset(&fl, 0, sizeof(fl));
+ fl.l_whence = SEEK_SET;
+ fl.l_start = offset;
+ fl.l_len = bytes;
+
+ if (xfsctl(NULL, s->fd, XFS_IOC_UNRESVSP64, &fl) < 0) {
+ err = errno;
+ DPRINTF("cannot punch hole (%s)\n", strerror(errno));
+ return -err;
+ }
+
+ return 0;
+}
+#endif
+
+static int translate_err(int err)
+{
+ if (err == -ENODEV || err == -ENOSYS || err == -EOPNOTSUPP ||
+ err == -ENOTTY) {
+ err = -ENOTSUP;
+ }
+ return err;
+}
+
+#ifdef CONFIG_FALLOCATE
+static int do_fallocate(int fd, int mode, off_t offset, off_t len)
+{
+ do {
+ if (fallocate(fd, mode, offset, len) == 0) {
+ return 0;
+ }
+ } while (errno == EINTR);
+ return translate_err(-errno);
+}
+#endif
+
+static ssize_t handle_aiocb_write_zeroes_block(RawPosixAIOData *aiocb)
+{
+ int ret = -ENOTSUP;
+ BDRVRawState *s = aiocb->bs->opaque;
+
+ if (!s->has_write_zeroes) {
+ return -ENOTSUP;
+ }
+
+#ifdef BLKZEROOUT
+ do {
+ uint64_t range[2] = { aiocb->aio_offset, aiocb->aio_nbytes };
+ if (ioctl(aiocb->aio_fildes, BLKZEROOUT, range) == 0) {
+ return 0;
+ }
+ } while (errno == EINTR);
+
+ ret = translate_err(-errno);
+#endif
+
+ if (ret == -ENOTSUP) {
+ s->has_write_zeroes = false;
+ }
+ return ret;
+}
+
+static ssize_t handle_aiocb_write_zeroes(RawPosixAIOData *aiocb)
+{
+#if defined(CONFIG_FALLOCATE) || defined(CONFIG_XFS)
+ BDRVRawState *s = aiocb->bs->opaque;
+#endif
+
+ if (aiocb->aio_type & QEMU_AIO_BLKDEV) {
+ return handle_aiocb_write_zeroes_block(aiocb);
+ }
+
+#ifdef CONFIG_XFS
+ if (s->is_xfs) {
+ return xfs_write_zeroes(s, aiocb->aio_offset, aiocb->aio_nbytes);
+ }
+#endif
+
+#ifdef CONFIG_FALLOCATE_ZERO_RANGE
+ if (s->has_write_zeroes) {
+ int ret = do_fallocate(s->fd, FALLOC_FL_ZERO_RANGE,
+ aiocb->aio_offset, aiocb->aio_nbytes);
+ if (ret == 0 || ret != -ENOTSUP) {
+ return ret;
+ }
+ s->has_write_zeroes = false;
+ }
+#endif
+
+#ifdef CONFIG_FALLOCATE_PUNCH_HOLE
+ if (s->has_discard && s->has_fallocate) {
+ int ret = do_fallocate(s->fd,
+ FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE,
+ aiocb->aio_offset, aiocb->aio_nbytes);
+ if (ret == 0) {
+ ret = do_fallocate(s->fd, 0, aiocb->aio_offset, aiocb->aio_nbytes);
+ if (ret == 0 || ret != -ENOTSUP) {
+ return ret;
+ }
+ s->has_fallocate = false;
+ } else if (ret != -ENOTSUP) {
+ return ret;
+ } else {
+ s->has_discard = false;
+ }
+ }
+#endif
+
+#ifdef CONFIG_FALLOCATE
+ if (s->has_fallocate && aiocb->aio_offset >= bdrv_getlength(aiocb->bs)) {
+ int ret = do_fallocate(s->fd, 0, aiocb->aio_offset, aiocb->aio_nbytes);
+ if (ret == 0 || ret != -ENOTSUP) {
+ return ret;
+ }
+ s->has_fallocate = false;
+ }
+#endif
+
+ return -ENOTSUP;
+}
+
+static ssize_t handle_aiocb_discard(RawPosixAIOData *aiocb)
+{
+ int ret = -EOPNOTSUPP;
+ BDRVRawState *s = aiocb->bs->opaque;
+
+ if (!s->has_discard) {
+ return -ENOTSUP;
+ }
+
+ if (aiocb->aio_type & QEMU_AIO_BLKDEV) {
+#ifdef BLKDISCARD
+ do {
+ uint64_t range[2] = { aiocb->aio_offset, aiocb->aio_nbytes };
+ if (ioctl(aiocb->aio_fildes, BLKDISCARD, range) == 0) {
+ return 0;
+ }
+ } while (errno == EINTR);
+
+ ret = -errno;
+#endif
+ } else {
+#ifdef CONFIG_XFS
+ if (s->is_xfs) {
+ return xfs_discard(s, aiocb->aio_offset, aiocb->aio_nbytes);
+ }
+#endif
+
+#ifdef CONFIG_FALLOCATE_PUNCH_HOLE
+ ret = do_fallocate(s->fd, FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE,
+ aiocb->aio_offset, aiocb->aio_nbytes);
+#endif
+ }
+
+ ret = translate_err(ret);
+ if (ret == -ENOTSUP) {
+ s->has_discard = false;
+ }
+ return ret;
+}
+
+static int aio_worker(void *arg)
+{
+ RawPosixAIOData *aiocb = arg;
+ ssize_t ret = 0;
+
+ switch (aiocb->aio_type & QEMU_AIO_TYPE_MASK) {
+ case QEMU_AIO_READ:
+ ret = handle_aiocb_rw(aiocb);
+ if (ret >= 0 && ret < aiocb->aio_nbytes) {
+ iov_memset(aiocb->aio_iov, aiocb->aio_niov, ret,
+ 0, aiocb->aio_nbytes - ret);
+
+ ret = aiocb->aio_nbytes;
+ }
+ if (ret == aiocb->aio_nbytes) {
+ ret = 0;
+ } else if (ret >= 0 && ret < aiocb->aio_nbytes) {
+ ret = -EINVAL;
+ }
+ break;
+ case QEMU_AIO_WRITE:
+ ret = handle_aiocb_rw(aiocb);
+ if (ret == aiocb->aio_nbytes) {
+ ret = 0;
+ } else if (ret >= 0 && ret < aiocb->aio_nbytes) {
+ ret = -EINVAL;
+ }
+ break;
+ case QEMU_AIO_FLUSH:
+ ret = handle_aiocb_flush(aiocb);
+ break;
+ case QEMU_AIO_IOCTL:
+ ret = handle_aiocb_ioctl(aiocb);
+ break;
+ case QEMU_AIO_DISCARD:
+ ret = handle_aiocb_discard(aiocb);
+ break;
+ case QEMU_AIO_WRITE_ZEROES:
+ ret = handle_aiocb_write_zeroes(aiocb);
+ break;
+ default:
+ fprintf(stderr, "invalid aio request (0x%x)\n", aiocb->aio_type);
+ ret = -EINVAL;
+ break;
+ }
+
+ g_free(aiocb);
+ return ret;
+}
+
+static int paio_submit_co(BlockDriverState *bs, int fd,
+ int64_t offset, QEMUIOVector *qiov,
+ int count, int type)
+{
+ RawPosixAIOData *acb = g_new(RawPosixAIOData, 1);
+ ThreadPool *pool;
+
+ acb->bs = bs;
+ acb->aio_type = type;
+ acb->aio_fildes = fd;
+
+ acb->aio_nbytes = count;
+ acb->aio_offset = offset;
+
+ if (qiov) {
+ acb->aio_iov = qiov->iov;
+ acb->aio_niov = qiov->niov;
+ assert(qiov->size == count);
+ }
+
+ trace_paio_submit_co(offset, count, type);
+ pool = aio_get_thread_pool(bdrv_get_aio_context(bs));
+ return thread_pool_submit_co(pool, aio_worker, acb);
+}
+
+static BlockAIOCB *paio_submit(BlockDriverState *bs, int fd,
+ int64_t offset, QEMUIOVector *qiov, int count,
+ BlockCompletionFunc *cb, void *opaque, int type)
+{
+ RawPosixAIOData *acb = g_new(RawPosixAIOData, 1);
+ ThreadPool *pool;
+
+ acb->bs = bs;
+ acb->aio_type = type;
+ acb->aio_fildes = fd;
+
+ acb->aio_nbytes = count;
+ acb->aio_offset = offset;
+
+ if (qiov) {
+ acb->aio_iov = qiov->iov;
+ acb->aio_niov = qiov->niov;
+ assert(qiov->size == acb->aio_nbytes);
+ }
+
+ trace_paio_submit(acb, opaque, offset, count, type);
+ pool = aio_get_thread_pool(bdrv_get_aio_context(bs));
+ return thread_pool_submit_aio(pool, aio_worker, acb, cb, opaque);
+}
+
+static int coroutine_fn raw_co_prw(BlockDriverState *bs, uint64_t offset,
+ uint64_t bytes, QEMUIOVector *qiov, int type)
+{
+ BDRVRawState *s = bs->opaque;
+
+ if (fd_open(bs) < 0)
+ return -EIO;
+
+ /*
+ * Check if the underlying device requires requests to be aligned,
+ * and if the request we are trying to submit is aligned or not.
+ * If this is the case tell the low-level driver that it needs
+ * to copy the buffer.
+ */
+ if (s->needs_alignment) {
+ if (!bdrv_qiov_is_aligned(bs, qiov)) {
+ type |= QEMU_AIO_MISALIGNED;
+#ifdef CONFIG_LINUX_AIO
+ } else if (s->use_linux_aio) {
+ LinuxAioState *aio = aio_get_linux_aio(bdrv_get_aio_context(bs));
+ assert(qiov->size == bytes);
+ return laio_co_submit(bs, aio, s->fd, offset, qiov, type);
+#endif
+ }
+ }
+
+ return paio_submit_co(bs, s->fd, offset, qiov, bytes, type);
+}
+
+static int coroutine_fn raw_co_preadv(BlockDriverState *bs, uint64_t offset,
+ uint64_t bytes, QEMUIOVector *qiov,
+ int flags)
+{
+ return raw_co_prw(bs, offset, bytes, qiov, QEMU_AIO_READ);
+}
+
+static int coroutine_fn raw_co_pwritev(BlockDriverState *bs, uint64_t offset,
+ uint64_t bytes, QEMUIOVector *qiov,
+ int flags)
+{
+ assert(flags == 0);
+ return raw_co_prw(bs, offset, bytes, qiov, QEMU_AIO_WRITE);
+}
+
+static void raw_aio_plug(BlockDriverState *bs)
+{
+#ifdef CONFIG_LINUX_AIO
+ BDRVRawState *s = bs->opaque;
+ if (s->use_linux_aio) {
+ LinuxAioState *aio = aio_get_linux_aio(bdrv_get_aio_context(bs));
+ laio_io_plug(bs, aio);
+ }
+#endif
+}
+
+static void raw_aio_unplug(BlockDriverState *bs)
+{
+#ifdef CONFIG_LINUX_AIO
+ BDRVRawState *s = bs->opaque;
+ if (s->use_linux_aio) {
+ LinuxAioState *aio = aio_get_linux_aio(bdrv_get_aio_context(bs));
+ laio_io_unplug(bs, aio);
+ }
+#endif
+}
+
+static BlockAIOCB *raw_aio_flush(BlockDriverState *bs,
+ BlockCompletionFunc *cb, void *opaque)
+{
+ BDRVRawState *s = bs->opaque;
+
+ if (fd_open(bs) < 0)
+ return NULL;
+
+ return paio_submit(bs, s->fd, 0, NULL, 0, cb, opaque, QEMU_AIO_FLUSH);
+}
+
+static void raw_close(BlockDriverState *bs)
+{
+ BDRVRawState *s = bs->opaque;
+
+ if (s->fd >= 0) {
+ qemu_close(s->fd);
+ s->fd = -1;
+ }
+}
+
+static int raw_truncate(BlockDriverState *bs, int64_t offset)
+{
+ BDRVRawState *s = bs->opaque;
+ struct stat st;
+
+ if (fstat(s->fd, &st)) {
+ return -errno;
+ }
+
+ if (S_ISREG(st.st_mode)) {
+ if (ftruncate(s->fd, offset) < 0) {
+ return -errno;
+ }
+ } else if (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode)) {
+ if (offset > raw_getlength(bs)) {
+ return -EINVAL;
+ }
+ } else {
+ return -ENOTSUP;
+ }
+
+ return 0;
+}
+
+#ifdef __OpenBSD__
+static int64_t raw_getlength(BlockDriverState *bs)
+{
+ BDRVRawState *s = bs->opaque;
+ int fd = s->fd;
+ struct stat st;
+
+ if (fstat(fd, &st))
+ return -errno;
+ if (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode)) {
+ struct disklabel dl;
+
+ if (ioctl(fd, DIOCGDINFO, &dl))
+ return -errno;
+ return (uint64_t)dl.d_secsize *
+ dl.d_partitions[DISKPART(st.st_rdev)].p_size;
+ } else
+ return st.st_size;
+}
+#elif defined(__NetBSD__)
+static int64_t raw_getlength(BlockDriverState *bs)
+{
+ BDRVRawState *s = bs->opaque;
+ int fd = s->fd;
+ struct stat st;
+
+ if (fstat(fd, &st))
+ return -errno;
+ if (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode)) {
+ struct dkwedge_info dkw;
+
+ if (ioctl(fd, DIOCGWEDGEINFO, &dkw) != -1) {
+ return dkw.dkw_size * 512;
+ } else {
+ struct disklabel dl;
+
+ if (ioctl(fd, DIOCGDINFO, &dl))
+ return -errno;
+ return (uint64_t)dl.d_secsize *
+ dl.d_partitions[DISKPART(st.st_rdev)].p_size;
+ }
+ } else
+ return st.st_size;
+}
+#elif defined(__sun__)
+static int64_t raw_getlength(BlockDriverState *bs)
+{
+ BDRVRawState *s = bs->opaque;
+ struct dk_minfo minfo;
+ int ret;
+ int64_t size;
+
+ ret = fd_open(bs);
+ if (ret < 0) {
+ return ret;
+ }
+
+ /*
+ * Use the DKIOCGMEDIAINFO ioctl to read the size.
+ */
+ ret = ioctl(s->fd, DKIOCGMEDIAINFO, &minfo);
+ if (ret != -1) {
+ return minfo.dki_lbsize * minfo.dki_capacity;
+ }
+
+ /*
+ * There are reports that lseek on some devices fails, but
+ * irc discussion said that contingency on contingency was overkill.
+ */
+ size = lseek(s->fd, 0, SEEK_END);
+ if (size < 0) {
+ return -errno;
+ }
+ return size;
+}
+#elif defined(CONFIG_BSD)
+static int64_t raw_getlength(BlockDriverState *bs)
+{
+ BDRVRawState *s = bs->opaque;
+ int fd = s->fd;
+ int64_t size;
+ struct stat sb;
+#if defined (__FreeBSD__) || defined(__FreeBSD_kernel__)
+ int reopened = 0;
+#endif
+ int ret;
+
+ ret = fd_open(bs);
+ if (ret < 0)
+ return ret;
+
+#if defined (__FreeBSD__) || defined(__FreeBSD_kernel__)
+again:
+#endif
+ if (!fstat(fd, &sb) && (S_IFCHR & sb.st_mode)) {
+#ifdef DIOCGMEDIASIZE
+ if (ioctl(fd, DIOCGMEDIASIZE, (off_t *)&size))
+#elif defined(DIOCGPART)
+ {
+ struct partinfo pi;
+ if (ioctl(fd, DIOCGPART, &pi) == 0)
+ size = pi.media_size;
+ else
+ size = 0;
+ }
+ if (size == 0)
+#endif
+#if defined(__APPLE__) && defined(__MACH__)
+ {
+ uint64_t sectors = 0;
+ uint32_t sector_size = 0;
+
+ if (ioctl(fd, DKIOCGETBLOCKCOUNT, §ors) == 0
+ && ioctl(fd, DKIOCGETBLOCKSIZE, §or_size) == 0) {
+ size = sectors * sector_size;
+ } else {
+ size = lseek(fd, 0LL, SEEK_END);
+ if (size < 0) {
+ return -errno;
+ }
+ }
+ }
+#else
+ size = lseek(fd, 0LL, SEEK_END);
+ if (size < 0) {
+ return -errno;
+ }
+#endif
+#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
+ switch(s->type) {
+ case FTYPE_CD:
+ /* XXX FreeBSD acd returns UINT_MAX sectors for an empty drive */
+ if (size == 2048LL * (unsigned)-1)
+ size = 0;
+ /* XXX no disc? maybe we need to reopen... */
+ if (size <= 0 && !reopened && cdrom_reopen(bs) >= 0) {
+ reopened = 1;
+ goto again;
+ }
+ }
+#endif
+ } else {
+ size = lseek(fd, 0, SEEK_END);
+ if (size < 0) {
+ return -errno;
+ }
+ }
+ return size;
+}
+#else
+static int64_t raw_getlength(BlockDriverState *bs)
+{
+ BDRVRawState *s = bs->opaque;
+ int ret;
+ int64_t size;
+
+ ret = fd_open(bs);
+ if (ret < 0) {
+ return ret;
+ }
+
+ size = lseek(s->fd, 0, SEEK_END);
+ if (size < 0) {
+ return -errno;
+ }
+ return size;
+}
+#endif
+
+static int64_t raw_get_allocated_file_size(BlockDriverState *bs)
+{
+ struct stat st;
+ BDRVRawState *s = bs->opaque;
+
+ if (fstat(s->fd, &st) < 0) {
+ return -errno;
+ }
+ return (int64_t)st.st_blocks * 512;
+}
+
+static int raw_create(const char *filename, QemuOpts *opts, Error **errp)
+{
+ int fd;
+ int result = 0;
+ int64_t total_size = 0;
+ bool nocow = false;
+ PreallocMode prealloc;
+ char *buf = NULL;
+ Error *local_err = NULL;
+
+ strstart(filename, "file:", &filename);
+
+ /* Read out options */
+ total_size = ROUND_UP(qemu_opt_get_size_del(opts, BLOCK_OPT_SIZE, 0),
+ BDRV_SECTOR_SIZE);
+ nocow = qemu_opt_get_bool(opts, BLOCK_OPT_NOCOW, false);
+ buf = qemu_opt_get_del(opts, BLOCK_OPT_PREALLOC);
+ prealloc = qapi_enum_parse(PreallocMode_lookup, buf,
+ PREALLOC_MODE__MAX, PREALLOC_MODE_OFF,
+ &local_err);
+ g_free(buf);
+ if (local_err) {
+ error_propagate(errp, local_err);
+ result = -EINVAL;
+ goto out;
+ }
+
+ fd = qemu_open(filename, O_RDWR | O_CREAT | O_TRUNC | O_BINARY,
+ 0644);
+ if (fd < 0) {
+ result = -errno;
+ error_setg_errno(errp, -result, "Could not create file");
+ goto out;
+ }
+
+ if (nocow) {
+#ifdef __linux__
+ /* Set NOCOW flag to solve performance issue on fs like btrfs.
+ * This is an optimisation. The FS_IOC_SETFLAGS ioctl return value
+ * will be ignored since any failure of this operation should not
+ * block the left work.
+ */
+ int attr;
+ if (ioctl(fd, FS_IOC_GETFLAGS, &attr) == 0) {
+ attr |= FS_NOCOW_FL;
+ ioctl(fd, FS_IOC_SETFLAGS, &attr);
+ }
+#endif
+ }
+
+ if (ftruncate(fd, total_size) != 0) {
+ result = -errno;
+ error_setg_errno(errp, -result, "Could not resize file");
+ goto out_close;
+ }
+
+ switch (prealloc) {
+#ifdef CONFIG_POSIX_FALLOCATE
+ case PREALLOC_MODE_FALLOC:
+ /* posix_fallocate() doesn't set errno. */
+ result = -posix_fallocate(fd, 0, total_size);
+ if (result != 0) {
+ error_setg_errno(errp, -result,
+ "Could not preallocate data for the new file");
+ }
+ break;
+#endif
+ case PREALLOC_MODE_FULL:
+ {
+ int64_t num = 0, left = total_size;
+ buf = g_malloc0(65536);
+
+ while (left > 0) {
+ num = MIN(left, 65536);
+ result = write(fd, buf, num);
+ if (result < 0) {
+ result = -errno;
+ error_setg_errno(errp, -result,
+ "Could not write to the new file");
+ break;
+ }
+ left -= result;
+ }
+ if (result >= 0) {
+ result = fsync(fd);
+ if (result < 0) {
+ result = -errno;
+ error_setg_errno(errp, -result,
+ "Could not flush new file to disk");
+ }
+ }
+ g_free(buf);
+ break;
+ }
+ case PREALLOC_MODE_OFF:
+ break;
+ default:
+ result = -EINVAL;
+ error_setg(errp, "Unsupported preallocation mode: %s",
+ PreallocMode_lookup[prealloc]);
+ break;
+ }
+
+out_close:
+ if (qemu_close(fd) != 0 && result == 0) {
+ result = -errno;
+ error_setg_errno(errp, -result, "Could not close the new file");
+ }
+out:
+ return result;
+}
+
+/*
+ * Find allocation range in @bs around offset @start.
+ * May change underlying file descriptor's file offset.
+ * If @start is not in a hole, store @start in @data, and the
+ * beginning of the next hole in @hole, and return 0.
+ * If @start is in a non-trailing hole, store @start in @hole and the
+ * beginning of the next non-hole in @data, and return 0.
+ * If @start is in a trailing hole or beyond EOF, return -ENXIO.
+ * If we can't find out, return a negative errno other than -ENXIO.
+ */
+static int find_allocation(BlockDriverState *bs, off_t start,
+ off_t *data, off_t *hole)
+{
+#if defined SEEK_HOLE && defined SEEK_DATA
+ BDRVRawState *s = bs->opaque;
+ off_t offs;
+
+ /*
+ * SEEK_DATA cases:
+ * D1. offs == start: start is in data
+ * D2. offs > start: start is in a hole, next data at offs
+ * D3. offs < 0, errno = ENXIO: either start is in a trailing hole
+ * or start is beyond EOF
+ * If the latter happens, the file has been truncated behind
+ * our back since we opened it. All bets are off then.
+ * Treating like a trailing hole is simplest.
+ * D4. offs < 0, errno != ENXIO: we learned nothing
+ */
+ offs = lseek(s->fd, start, SEEK_DATA);
+ if (offs < 0) {
+ return -errno; /* D3 or D4 */
+ }
+ assert(offs >= start);
+
+ if (offs > start) {
+ /* D2: in hole, next data at offs */
+ *hole = start;
+ *data = offs;
+ return 0;
+ }
+
+ /* D1: in data, end not yet known */
+
+ /*
+ * SEEK_HOLE cases:
+ * H1. offs == start: start is in a hole
+ * If this happens here, a hole has been dug behind our back
+ * since the previous lseek().
+ * H2. offs > start: either start is in data, next hole at offs,
+ * or start is in trailing hole, EOF at offs
+ * Linux treats trailing holes like any other hole: offs ==
+ * start. Solaris seeks to EOF instead: offs > start (blech).
+ * If that happens here, a hole has been dug behind our back
+ * since the previous lseek().
+ * H3. offs < 0, errno = ENXIO: start is beyond EOF
+ * If this happens, the file has been truncated behind our
+ * back since we opened it. Treat it like a trailing hole.
+ * H4. offs < 0, errno != ENXIO: we learned nothing
+ * Pretend we know nothing at all, i.e. "forget" about D1.
+ */
+ offs = lseek(s->fd, start, SEEK_HOLE);
+ if (offs < 0) {
+ return -errno; /* D1 and (H3 or H4) */
+ }
+ assert(offs >= start);
+
+ if (offs > start) {
+ /*
+ * D1 and H2: either in data, next hole at offs, or it was in
+ * data but is now in a trailing hole. In the latter case,
+ * all bets are off. Treating it as if it there was data all
+ * the way to EOF is safe, so simply do that.
+ */
+ *data = start;
+ *hole = offs;
+ return 0;
+ }
+
+ /* D1 and H1 */
+ return -EBUSY;
+#else
+ return -ENOTSUP;
+#endif
+}
+
+/*
+ * Returns the allocation status of the specified sectors.
+ *
+ * If 'sector_num' is beyond the end of the disk image the return value is 0
+ * and 'pnum' is set to 0.
+ *
+ * 'pnum' is set to the number of sectors (including and immediately following
+ * the specified sector) that are known to be in the same
+ * allocated/unallocated state.
+ *
+ * 'nb_sectors' is the max value 'pnum' should be set to. If nb_sectors goes
+ * beyond the end of the disk image it will be clamped.
+ */
+static int64_t coroutine_fn raw_co_get_block_status(BlockDriverState *bs,
+ int64_t sector_num,
+ int nb_sectors, int *pnum,
+ BlockDriverState **file)
+{
+ off_t start, data = 0, hole = 0;
+ int64_t total_size;
+ int ret;
+
+ ret = fd_open(bs);
+ if (ret < 0) {
+ return ret;
+ }
+
+ start = sector_num * BDRV_SECTOR_SIZE;
+ total_size = bdrv_getlength(bs);
+ if (total_size < 0) {
+ return total_size;
+ } else if (start >= total_size) {
+ *pnum = 0;
+ return 0;
+ } else if (start + nb_sectors * BDRV_SECTOR_SIZE > total_size) {
+ nb_sectors = DIV_ROUND_UP(total_size - start, BDRV_SECTOR_SIZE);
+ }
+
+ ret = find_allocation(bs, start, &data, &hole);
+ if (ret == -ENXIO) {
+ /* Trailing hole */
+ *pnum = nb_sectors;
+ ret = BDRV_BLOCK_ZERO;
+ } else if (ret < 0) {
+ /* No info available, so pretend there are no holes */
+ *pnum = nb_sectors;
+ ret = BDRV_BLOCK_DATA;
+ } else if (data == start) {
+ /* On a data extent, compute sectors to the end of the extent,
+ * possibly including a partial sector at EOF. */
+ *pnum = MIN(nb_sectors, DIV_ROUND_UP(hole - start, BDRV_SECTOR_SIZE));
+ ret = BDRV_BLOCK_DATA;
+ } else {
+ /* On a hole, compute sectors to the beginning of the next extent. */
+ assert(hole == start);
+ *pnum = MIN(nb_sectors, (data - start) / BDRV_SECTOR_SIZE);
+ ret = BDRV_BLOCK_ZERO;
+ }
+ *file = bs;
+ return ret | BDRV_BLOCK_OFFSET_VALID | start;
+}
+
+static coroutine_fn BlockAIOCB *raw_aio_pdiscard(BlockDriverState *bs,
+ int64_t offset, int count,
+ BlockCompletionFunc *cb, void *opaque)
+{
+ BDRVRawState *s = bs->opaque;
+
+ return paio_submit(bs, s->fd, offset, NULL, count,
+ cb, opaque, QEMU_AIO_DISCARD);
+}
+
+static int coroutine_fn raw_co_pwrite_zeroes(
+ BlockDriverState *bs, int64_t offset,
+ int count, BdrvRequestFlags flags)
+{
+ BDRVRawState *s = bs->opaque;
+
+ if (!(flags & BDRV_REQ_MAY_UNMAP)) {
+ return paio_submit_co(bs, s->fd, offset, NULL, count,
+ QEMU_AIO_WRITE_ZEROES);
+ } else if (s->discard_zeroes) {
+ return paio_submit_co(bs, s->fd, offset, NULL, count,
+ QEMU_AIO_DISCARD);
+ }
+ return -ENOTSUP;
+}
+
+static int raw_get_info(BlockDriverState *bs, BlockDriverInfo *bdi)
+{
+ BDRVRawState *s = bs->opaque;
+
+ bdi->unallocated_blocks_are_zero = s->discard_zeroes;
+ bdi->can_write_zeroes_with_unmap = s->discard_zeroes;
+ 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"
+ },
+ {
+ .name = BLOCK_OPT_NOCOW,
+ .type = QEMU_OPT_BOOL,
+ .help = "Turn off copy-on-write (valid only on btrfs)"
+ },
+ {
+ .name = BLOCK_OPT_PREALLOC,
+ .type = QEMU_OPT_STRING,
+ .help = "Preallocation mode (allowed values: off, falloc, full)"
+ },
+ { /* end of list */ }
+ }
+};
+
+BlockDriver bdrv_file = {
+ .format_name = "file",
+ .protocol_name = "file",
+ .instance_size = sizeof(BDRVRawState),
+ .bdrv_needs_filename = true,
+ .bdrv_probe = NULL, /* no probe for protocols */
+ .bdrv_parse_filename = raw_parse_filename,
+ .bdrv_file_open = raw_open,
+ .bdrv_reopen_prepare = raw_reopen_prepare,
+ .bdrv_reopen_commit = raw_reopen_commit,
+ .bdrv_reopen_abort = raw_reopen_abort,
+ .bdrv_close = raw_close,
+ .bdrv_create = raw_create,
+ .bdrv_has_zero_init = bdrv_has_zero_init_1,
+ .bdrv_co_get_block_status = raw_co_get_block_status,
+ .bdrv_co_pwrite_zeroes = raw_co_pwrite_zeroes,
+
+ .bdrv_co_preadv = raw_co_preadv,
+ .bdrv_co_pwritev = raw_co_pwritev,
+ .bdrv_aio_flush = raw_aio_flush,
+ .bdrv_aio_pdiscard = raw_aio_pdiscard,
+ .bdrv_refresh_limits = raw_refresh_limits,
+ .bdrv_io_plug = raw_aio_plug,
+ .bdrv_io_unplug = raw_aio_unplug,
+
+ .bdrv_truncate = raw_truncate,
+ .bdrv_getlength = raw_getlength,
+ .bdrv_get_info = raw_get_info,
+ .bdrv_get_allocated_file_size
+ = raw_get_allocated_file_size,
+
+ .create_opts = &raw_create_opts,
+};
+
+/***********************************************/
+/* host device */
+
+#if defined(__APPLE__) && defined(__MACH__)
+static kern_return_t GetBSDPath(io_iterator_t mediaIterator, char *bsdPath,
+ CFIndex maxPathSize, int flags);
+static char *FindEjectableOpticalMedia(io_iterator_t *mediaIterator)
+{
+ kern_return_t kernResult = KERN_FAILURE;
+ mach_port_t masterPort;
+ CFMutableDictionaryRef classesToMatch;
+ const char *matching_array[] = {kIODVDMediaClass, kIOCDMediaClass};
+ char *mediaType = NULL;
+
+ kernResult = IOMasterPort( MACH_PORT_NULL, &masterPort );
+ if ( KERN_SUCCESS != kernResult ) {
+ printf( "IOMasterPort returned %d\n", kernResult );
+ }
+
+ int index;
+ for (index = 0; index < ARRAY_SIZE(matching_array); index++) {
+ classesToMatch = IOServiceMatching(matching_array[index]);
+ if (classesToMatch == NULL) {
+ error_report("IOServiceMatching returned NULL for %s",
+ matching_array[index]);
+ continue;
+ }
+ CFDictionarySetValue(classesToMatch, CFSTR(kIOMediaEjectableKey),
+ kCFBooleanTrue);
+ kernResult = IOServiceGetMatchingServices(masterPort, classesToMatch,
+ mediaIterator);
+ if (kernResult != KERN_SUCCESS) {
+ error_report("Note: IOServiceGetMatchingServices returned %d",
+ kernResult);
+ continue;
+ }
+
+ /* If a match was found, leave the loop */
+ if (*mediaIterator != 0) {
+ DPRINTF("Matching using %s\n", matching_array[index]);
+ mediaType = g_strdup(matching_array[index]);
+ break;
+ }
+ }
+ return mediaType;
+}
+
+kern_return_t GetBSDPath(io_iterator_t mediaIterator, char *bsdPath,
+ CFIndex maxPathSize, int flags)
+{
+ io_object_t nextMedia;
+ kern_return_t kernResult = KERN_FAILURE;
+ *bsdPath = '\0';
+ nextMedia = IOIteratorNext( mediaIterator );
+ if ( nextMedia )
+ {
+ CFTypeRef bsdPathAsCFString;
+ bsdPathAsCFString = IORegistryEntryCreateCFProperty( nextMedia, CFSTR( kIOBSDNameKey ), kCFAllocatorDefault, 0 );
+ if ( bsdPathAsCFString ) {
+ size_t devPathLength;
+ strcpy( bsdPath, _PATH_DEV );
+ if (flags & BDRV_O_NOCACHE) {
+ strcat(bsdPath, "r");
+ }
+ devPathLength = strlen( bsdPath );
+ if ( CFStringGetCString( bsdPathAsCFString, bsdPath + devPathLength, maxPathSize - devPathLength, kCFStringEncodingASCII ) ) {
+ kernResult = KERN_SUCCESS;
+ }
+ CFRelease( bsdPathAsCFString );
+ }
+ IOObjectRelease( nextMedia );
+ }
+
+ return kernResult;
+}
+
+/* Sets up a real cdrom for use in QEMU */
+static bool setup_cdrom(char *bsd_path, Error **errp)
+{
+ int index, num_of_test_partitions = 2, fd;
+ char test_partition[MAXPATHLEN];
+ bool partition_found = false;
+
+ /* look for a working partition */
+ for (index = 0; index < num_of_test_partitions; index++) {
+ snprintf(test_partition, sizeof(test_partition), "%ss%d", bsd_path,
+ index);
+ fd = qemu_open(test_partition, O_RDONLY | O_BINARY | O_LARGEFILE);
+ if (fd >= 0) {
+ partition_found = true;
+ qemu_close(fd);
+ break;
+ }
+ }
+
+ /* if a working partition on the device was not found */
+ if (partition_found == false) {
+ error_setg(errp, "Failed to find a working partition on disc");
+ } else {
+ DPRINTF("Using %s as optical disc\n", test_partition);
+ pstrcpy(bsd_path, MAXPATHLEN, test_partition);
+ }
+ return partition_found;
+}
+
+/* Prints directions on mounting and unmounting a device */
+static void print_unmounting_directions(const char *file_name)
+{
+ error_report("If device %s is mounted on the desktop, unmount"
+ " it first before using it in QEMU", file_name);
+ error_report("Command to unmount device: diskutil unmountDisk %s",
+ file_name);
+ error_report("Command to mount device: diskutil mountDisk %s", file_name);
+}
+
+#endif /* defined(__APPLE__) && defined(__MACH__) */
+
+static int hdev_probe_device(const char *filename)
+{
+ struct stat st;
+
+ /* allow a dedicated CD-ROM driver to match with a higher priority */
+ if (strstart(filename, "/dev/cdrom", NULL))
+ return 50;
+
+ if (stat(filename, &st) >= 0 &&
+ (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode))) {
+ return 100;
+ }
+
+ return 0;
+}
+
+static int check_hdev_writable(BDRVRawState *s)
+{
+#if defined(BLKROGET)
+ /* Linux block devices can be configured "read-only" using blockdev(8).
+ * This is independent of device node permissions and therefore open(2)
+ * with O_RDWR succeeds. Actual writes fail with EPERM.
+ *
+ * bdrv_open() is supposed to fail if the disk is read-only. Explicitly
+ * check for read-only block devices so that Linux block devices behave
+ * properly.
+ */
+ struct stat st;
+ int readonly = 0;
+
+ if (fstat(s->fd, &st)) {
+ return -errno;
+ }
+
+ if (!S_ISBLK(st.st_mode)) {
+ return 0;
+ }
+
+ if (ioctl(s->fd, BLKROGET, &readonly) < 0) {
+ return -errno;
+ }
+
+ if (readonly) {
+ return -EACCES;
+ }
+#endif /* defined(BLKROGET) */
+ 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 bool hdev_is_sg(BlockDriverState *bs)
+{
+
+#if defined(__linux__)
+
+ BDRVRawState *s = bs->opaque;
+ struct stat st;
+ struct sg_scsi_id scsiid;
+ int sg_version;
+ int ret;
+
+ if (stat(bs->filename, &st) < 0 || !S_ISCHR(st.st_mode)) {
+ return false;
+ }
+
+ ret = ioctl(s->fd, SG_GET_VERSION_NUM, &sg_version);
+ if (ret < 0) {
+ return false;
+ }
+
+ ret = ioctl(s->fd, SG_GET_SCSI_ID, &scsiid);
+ if (ret >= 0) {
+ DPRINTF("SG device found: type=%d, version=%d\n",
+ scsiid.scsi_type, sg_version);
+ return true;
+ }
+
+#endif
+
+ return false;
+}
+
+static int hdev_open(BlockDriverState *bs, QDict *options, int flags,
+ Error **errp)
+{
+ BDRVRawState *s = bs->opaque;
+ Error *local_err = NULL;
+ int ret;
+
+#if defined(__APPLE__) && defined(__MACH__)
+ const char *filename = qdict_get_str(options, "filename");
+ char bsd_path[MAXPATHLEN] = "";
+ bool error_occurred = false;
+
+ /* If using a real cdrom */
+ if (strcmp(filename, "/dev/cdrom") == 0) {
+ char *mediaType = NULL;
+ kern_return_t ret_val;
+ io_iterator_t mediaIterator = 0;
+
+ mediaType = FindEjectableOpticalMedia(&mediaIterator);
+ if (mediaType == NULL) {
+ error_setg(errp, "Please make sure your CD/DVD is in the optical"
+ " drive");
+ error_occurred = true;
+ goto hdev_open_Mac_error;
+ }
+
+ ret_val = GetBSDPath(mediaIterator, bsd_path, sizeof(bsd_path), flags);
+ if (ret_val != KERN_SUCCESS) {
+ error_setg(errp, "Could not get BSD path for optical drive");
+ error_occurred = true;
+ goto hdev_open_Mac_error;
+ }
+
+ /* If a real optical drive was not found */
+ if (bsd_path[0] == '\0') {
+ error_setg(errp, "Failed to obtain bsd path for optical drive");
+ error_occurred = true;
+ goto hdev_open_Mac_error;
+ }
+
+ /* If using a cdrom disc and finding a partition on the disc failed */
+ if (strncmp(mediaType, kIOCDMediaClass, 9) == 0 &&
+ setup_cdrom(bsd_path, errp) == false) {
+ print_unmounting_directions(bsd_path);
+ error_occurred = true;
+ goto hdev_open_Mac_error;
+ }
+
+ qdict_put(options, "filename", qstring_from_str(bsd_path));
+
+hdev_open_Mac_error:
+ g_free(mediaType);
+ if (mediaIterator) {
+ IOObjectRelease(mediaIterator);
+ }
+ if (error_occurred) {
+ return -ENOENT;
+ }
+ }
+#endif /* defined(__APPLE__) && defined(__MACH__) */
+
+ s->type = FTYPE_FILE;
+
+ ret = raw_open_common(bs, options, flags, 0, &local_err);
+ if (ret < 0) {
+ error_propagate(errp, local_err);
+#if defined(__APPLE__) && defined(__MACH__)
+ if (*bsd_path) {
+ filename = bsd_path;
+ }
+ /* if a physical device experienced an error while being opened */
+ if (strncmp(filename, "/dev/", 5) == 0) {
+ print_unmounting_directions(filename);
+ }
+#endif /* defined(__APPLE__) && defined(__MACH__) */
+ return ret;
+ }
+
+ /* Since this does ioctl the device must be already opened */
+ bs->sg = hdev_is_sg(bs);
+
+ if (flags & BDRV_O_RDWR) {
+ ret = check_hdev_writable(s);
+ if (ret < 0) {
+ raw_close(bs);
+ error_setg_errno(errp, -ret, "The device is not writable");
+ return ret;
+ }
+ }
+
+ return ret;
+}
+
+#if defined(__linux__)
+
+static BlockAIOCB *hdev_aio_ioctl(BlockDriverState *bs,
+ unsigned long int req, void *buf,
+ BlockCompletionFunc *cb, void *opaque)
+{
+ BDRVRawState *s = bs->opaque;
+ RawPosixAIOData *acb;
+ ThreadPool *pool;
+
+ if (fd_open(bs) < 0)
+ return NULL;
+
+ acb = g_new(RawPosixAIOData, 1);
+ acb->bs = bs;
+ acb->aio_type = QEMU_AIO_IOCTL;
+ acb->aio_fildes = s->fd;
+ acb->aio_offset = 0;
+ acb->aio_ioctl_buf = buf;
+ acb->aio_ioctl_cmd = req;
+ pool = aio_get_thread_pool(bdrv_get_aio_context(bs));
+ return thread_pool_submit_aio(pool, aio_worker, acb, cb, opaque);
+}
+#endif /* linux */
+
+static int fd_open(BlockDriverState *bs)
+{
+ BDRVRawState *s = bs->opaque;
+
+ /* this is just to ensure s->fd is sane (its called by io ops) */
+ if (s->fd >= 0)
+ return 0;
+ return -EIO;
+}
+
+static coroutine_fn BlockAIOCB *hdev_aio_pdiscard(BlockDriverState *bs,
+ int64_t offset, int count,
+ BlockCompletionFunc *cb, void *opaque)
+{
+ BDRVRawState *s = bs->opaque;
+
+ if (fd_open(bs) < 0) {
+ return NULL;
+ }
+ return paio_submit(bs, s->fd, offset, NULL, count,
+ cb, opaque, QEMU_AIO_DISCARD|QEMU_AIO_BLKDEV);
+}
+
+static coroutine_fn int hdev_co_pwrite_zeroes(BlockDriverState *bs,
+ int64_t offset, int count, BdrvRequestFlags flags)
+{
+ BDRVRawState *s = bs->opaque;
+ int rc;
+
+ rc = fd_open(bs);
+ if (rc < 0) {
+ return rc;
+ }
+ if (!(flags & BDRV_REQ_MAY_UNMAP)) {
+ return paio_submit_co(bs, s->fd, offset, NULL, count,
+ QEMU_AIO_WRITE_ZEROES|QEMU_AIO_BLKDEV);
+ } else if (s->discard_zeroes) {
+ return paio_submit_co(bs, s->fd, offset, NULL, count,
+ QEMU_AIO_DISCARD|QEMU_AIO_BLKDEV);
+ }
+ return -ENOTSUP;
+}
+
+static int hdev_create(const char *filename, QemuOpts *opts,
+ Error **errp)
+{
+ int fd;
+ int ret = 0;
+ struct stat stat_buf;
+ int64_t total_size = 0;
+ bool has_prefix;
+
+ /* This function is used by both protocol block drivers and therefore either
+ * of these prefixes may be given.
+ * The return value has to be stored somewhere, otherwise this is an error
+ * due to -Werror=unused-value. */
+ has_prefix =
+ strstart(filename, "host_device:", &filename) ||
+ strstart(filename, "host_cdrom:" , &filename);
+
+ (void)has_prefix;
+
+ ret = raw_normalize_devicepath(&filename);
+ if (ret < 0) {
+ error_setg_errno(errp, -ret, "Could not normalize device path");
+ return ret;
+ }
+
+ /* 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_BINARY);
+ if (fd < 0) {
+ ret = -errno;
+ error_setg_errno(errp, -ret, "Could not open device");
+ return ret;
+ }
+
+ if (fstat(fd, &stat_buf) < 0) {
+ ret = -errno;
+ error_setg_errno(errp, -ret, "Could not stat device");
+ } else if (!S_ISBLK(stat_buf.st_mode) && !S_ISCHR(stat_buf.st_mode)) {
+ error_setg(errp,
+ "The given file is neither a block nor a character device");
+ ret = -ENODEV;
+ } else if (lseek(fd, 0, SEEK_END) < total_size) {
+ error_setg(errp, "Device is too small");
+ ret = -ENOSPC;
+ }
+
+ qemu_close(fd);
+ return ret;
+}
+
+static BlockDriver bdrv_host_device = {
+ .format_name = "host_device",
+ .protocol_name = "host_device",
+ .instance_size = sizeof(BDRVRawState),
+ .bdrv_needs_filename = true,
+ .bdrv_probe_device = hdev_probe_device,
+ .bdrv_parse_filename = hdev_parse_filename,
+ .bdrv_file_open = hdev_open,
+ .bdrv_close = raw_close,
+ .bdrv_reopen_prepare = raw_reopen_prepare,
+ .bdrv_reopen_commit = raw_reopen_commit,
+ .bdrv_reopen_abort = raw_reopen_abort,
+ .bdrv_create = hdev_create,
+ .create_opts = &raw_create_opts,
+ .bdrv_co_pwrite_zeroes = hdev_co_pwrite_zeroes,
+
+ .bdrv_co_preadv = raw_co_preadv,
+ .bdrv_co_pwritev = raw_co_pwritev,
+ .bdrv_aio_flush = raw_aio_flush,
+ .bdrv_aio_pdiscard = hdev_aio_pdiscard,
+ .bdrv_refresh_limits = raw_refresh_limits,
+ .bdrv_io_plug = raw_aio_plug,
+ .bdrv_io_unplug = raw_aio_unplug,
+
+ .bdrv_truncate = raw_truncate,
+ .bdrv_getlength = raw_getlength,
+ .bdrv_get_info = raw_get_info,
+ .bdrv_get_allocated_file_size
+ = raw_get_allocated_file_size,
+ .bdrv_probe_blocksizes = hdev_probe_blocksizes,
+ .bdrv_probe_geometry = hdev_probe_geometry,
+
+ /* generic scsi device */
+#ifdef __linux__
+ .bdrv_aio_ioctl = hdev_aio_ioctl,
+#endif
+};
+
+#if defined(__linux__) || defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
+static void cdrom_parse_filename(const char *filename, QDict *options,
+ Error **errp)
+{
+ /* The prefix is optional, just as for "file". */
+ strstart(filename, "host_cdrom:", &filename);
+
+ qdict_put_obj(options, "filename", QOBJECT(qstring_from_str(filename)));
+}
+#endif
+
+#ifdef __linux__
+static int cdrom_open(BlockDriverState *bs, QDict *options, int flags,
+ Error **errp)
+{
+ BDRVRawState *s = bs->opaque;
+
+ s->type = FTYPE_CD;
+
+ /* open will not fail even if no CD is inserted, so add O_NONBLOCK */
+ return raw_open_common(bs, options, flags, O_NONBLOCK, errp);
+}
+
+static int cdrom_probe_device(const char *filename)
+{
+ int fd, ret;
+ int prio = 0;
+ struct stat st;
+
+ fd = qemu_open(filename, O_RDONLY | O_NONBLOCK);
+ if (fd < 0) {
+ goto out;
+ }
+ ret = fstat(fd, &st);
+ if (ret == -1 || !S_ISBLK(st.st_mode)) {
+ goto outc;
+ }
+
+ /* Attempt to detect via a CDROM specific ioctl */
+ ret = ioctl(fd, CDROM_DRIVE_STATUS, CDSL_CURRENT);
+ if (ret >= 0)
+ prio = 100;
+
+outc:
+ qemu_close(fd);
+out:
+ return prio;
+}
+
+static bool cdrom_is_inserted(BlockDriverState *bs)
+{
+ BDRVRawState *s = bs->opaque;
+ int ret;
+
+ ret = ioctl(s->fd, CDROM_DRIVE_STATUS, CDSL_CURRENT);
+ return ret == CDS_DISC_OK;
+}
+
+static void cdrom_eject(BlockDriverState *bs, bool eject_flag)
+{
+ BDRVRawState *s = bs->opaque;
+
+ if (eject_flag) {
+ if (ioctl(s->fd, CDROMEJECT, NULL) < 0)
+ perror("CDROMEJECT");
+ } else {
+ if (ioctl(s->fd, CDROMCLOSETRAY, NULL) < 0)
+ perror("CDROMEJECT");
+ }
+}
+
+static void cdrom_lock_medium(BlockDriverState *bs, bool locked)
+{
+ BDRVRawState *s = bs->opaque;
+
+ if (ioctl(s->fd, CDROM_LOCKDOOR, locked) < 0) {
+ /*
+ * Note: an error can happen if the distribution automatically
+ * mounts the CD-ROM
+ */
+ /* perror("CDROM_LOCKDOOR"); */
+ }
+}
+
+static BlockDriver bdrv_host_cdrom = {
+ .format_name = "host_cdrom",
+ .protocol_name = "host_cdrom",
+ .instance_size = sizeof(BDRVRawState),
+ .bdrv_needs_filename = true,
+ .bdrv_probe_device = cdrom_probe_device,
+ .bdrv_parse_filename = cdrom_parse_filename,
+ .bdrv_file_open = cdrom_open,
+ .bdrv_close = raw_close,
+ .bdrv_reopen_prepare = raw_reopen_prepare,
+ .bdrv_reopen_commit = raw_reopen_commit,
+ .bdrv_reopen_abort = raw_reopen_abort,
+ .bdrv_create = hdev_create,
+ .create_opts = &raw_create_opts,
+
+
+ .bdrv_co_preadv = raw_co_preadv,
+ .bdrv_co_pwritev = raw_co_pwritev,
+ .bdrv_aio_flush = raw_aio_flush,
+ .bdrv_refresh_limits = raw_refresh_limits,
+ .bdrv_io_plug = raw_aio_plug,
+ .bdrv_io_unplug = raw_aio_unplug,
+
+ .bdrv_truncate = raw_truncate,
+ .bdrv_getlength = raw_getlength,
+ .has_variable_length = true,
+ .bdrv_get_allocated_file_size
+ = raw_get_allocated_file_size,
+
+ /* removable device support */
+ .bdrv_is_inserted = cdrom_is_inserted,
+ .bdrv_eject = cdrom_eject,
+ .bdrv_lock_medium = cdrom_lock_medium,
+
+ /* generic scsi device */
+ .bdrv_aio_ioctl = hdev_aio_ioctl,
+};
+#endif /* __linux__ */
+
+#if defined (__FreeBSD__) || defined(__FreeBSD_kernel__)
+static int cdrom_open(BlockDriverState *bs, QDict *options, int flags,
+ Error **errp)
+{
+ BDRVRawState *s = bs->opaque;
+ Error *local_err = NULL;
+ int ret;
+
+ s->type = FTYPE_CD;
+
+ ret = raw_open_common(bs, options, flags, 0, &local_err);
+ if (ret) {
+ error_propagate(errp, local_err);
+ return ret;
+ }
+
+ /* make sure the door isn't locked at this time */
+ ioctl(s->fd, CDIOCALLOW);
+ return 0;
+}
+
+static int cdrom_probe_device(const char *filename)
+{
+ if (strstart(filename, "/dev/cd", NULL) ||
+ strstart(filename, "/dev/acd", NULL))
+ return 100;
+ return 0;
+}
+
+static int cdrom_reopen(BlockDriverState *bs)
+{
+ BDRVRawState *s = bs->opaque;
+ int fd;
+
+ /*
+ * Force reread of possibly changed/newly loaded disc,
+ * FreeBSD seems to not notice sometimes...
+ */
+ if (s->fd >= 0)
+ qemu_close(s->fd);
+ fd = qemu_open(bs->filename, s->open_flags, 0644);
+ if (fd < 0) {
+ s->fd = -1;
+ return -EIO;
+ }
+ s->fd = fd;
+
+ /* make sure the door isn't locked at this time */
+ ioctl(s->fd, CDIOCALLOW);
+ return 0;
+}
+
+static bool cdrom_is_inserted(BlockDriverState *bs)
+{
+ return raw_getlength(bs) > 0;
+}
+
+static void cdrom_eject(BlockDriverState *bs, bool eject_flag)
+{
+ BDRVRawState *s = bs->opaque;
+
+ if (s->fd < 0)
+ return;
+
+ (void) ioctl(s->fd, CDIOCALLOW);
+
+ if (eject_flag) {
+ if (ioctl(s->fd, CDIOCEJECT) < 0)
+ perror("CDIOCEJECT");
+ } else {
+ if (ioctl(s->fd, CDIOCCLOSE) < 0)
+ perror("CDIOCCLOSE");
+ }
+
+ cdrom_reopen(bs);
+}
+
+static void cdrom_lock_medium(BlockDriverState *bs, bool locked)
+{
+ BDRVRawState *s = bs->opaque;
+
+ if (s->fd < 0)
+ return;
+ if (ioctl(s->fd, (locked ? CDIOCPREVENT : CDIOCALLOW)) < 0) {
+ /*
+ * Note: an error can happen if the distribution automatically
+ * mounts the CD-ROM
+ */
+ /* perror("CDROM_LOCKDOOR"); */
+ }
+}
+
+static BlockDriver bdrv_host_cdrom = {
+ .format_name = "host_cdrom",
+ .protocol_name = "host_cdrom",
+ .instance_size = sizeof(BDRVRawState),
+ .bdrv_needs_filename = true,
+ .bdrv_probe_device = cdrom_probe_device,
+ .bdrv_parse_filename = cdrom_parse_filename,
+ .bdrv_file_open = cdrom_open,
+ .bdrv_close = raw_close,
+ .bdrv_reopen_prepare = raw_reopen_prepare,
+ .bdrv_reopen_commit = raw_reopen_commit,
+ .bdrv_reopen_abort = raw_reopen_abort,
+ .bdrv_create = hdev_create,
+ .create_opts = &raw_create_opts,
+
+ .bdrv_co_preadv = raw_co_preadv,
+ .bdrv_co_pwritev = raw_co_pwritev,
+ .bdrv_aio_flush = raw_aio_flush,
+ .bdrv_refresh_limits = raw_refresh_limits,
+ .bdrv_io_plug = raw_aio_plug,
+ .bdrv_io_unplug = raw_aio_unplug,
+
+ .bdrv_truncate = raw_truncate,
+ .bdrv_getlength = raw_getlength,
+ .has_variable_length = true,
+ .bdrv_get_allocated_file_size
+ = raw_get_allocated_file_size,
+
+ /* removable device support */
+ .bdrv_is_inserted = cdrom_is_inserted,
+ .bdrv_eject = cdrom_eject,
+ .bdrv_lock_medium = cdrom_lock_medium,
+};
+#endif /* __FreeBSD__ */
+
+static void bdrv_file_init(void)
+{
+ /*
+ * Register all the drivers. Note that order is important, the driver
+ * registered last will get probed first.
+ */
+ bdrv_register(&bdrv_file);
+ bdrv_register(&bdrv_host_device);
+#ifdef __linux__
+ bdrv_register(&bdrv_host_cdrom);
+#endif
+#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
+ bdrv_register(&bdrv_host_cdrom);
+#endif
+}
+
+block_init(bdrv_file_init);
--- /dev/null
+/*
+ * 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 "block/raw-aio.h"
+#include "trace.h"
+#include "block/thread-pool.h"
+#include "qemu/iov.h"
+#include "qapi/qmp/qstring.h"
+#include "qapi/util.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 offset, QEMUIOVector *qiov, int count,
+ 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;
+ assert(qiov->size == count);
+ }
+ acb->aio_nbytes = count;
+ acb->aio_offset = offset;
+
+ trace_paio_submit(acb, opaque, offset, count, 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, Error **errp)
+{
+ BDRVRawState *s = bs->opaque;
+ DWORD sectorsPerCluster, freeClusters, totalClusters, count;
+ DISK_GEOMETRY_EX dg;
+ BOOL status;
+
+ if (s->type == FTYPE_CD) {
+ bs->bl.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->bl.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->bl.request_alignment = dg.Geometry.BytesPerSector;
+ }
+}
+
+static void raw_parse_flags(int flags, bool use_aio, 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 (use_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",
+ },
+ {
+ .name = "aio",
+ .type = QEMU_OPT_STRING,
+ .help = "host AIO implementation (threads, native)",
+ },
+ { /* end of list */ }
+ },
+};
+
+static bool get_aio_option(QemuOpts *opts, int flags, Error **errp)
+{
+ BlockdevAioOptions aio, aio_default;
+
+ aio_default = (flags & BDRV_O_NATIVE_AIO) ? BLOCKDEV_AIO_OPTIONS_NATIVE
+ : BLOCKDEV_AIO_OPTIONS_THREADS;
+ aio = qapi_enum_parse(BlockdevAioOptions_lookup, qemu_opt_get(opts, "aio"),
+ BLOCKDEV_AIO_OPTIONS__MAX, aio_default, errp);
+
+ switch (aio) {
+ case BLOCKDEV_AIO_OPTIONS_NATIVE:
+ return true;
+ case BLOCKDEV_AIO_OPTIONS_THREADS:
+ return false;
+ default:
+ error_setg(errp, "Invalid AIO option");
+ }
+ return false;
+}
+
+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;
+ bool use_aio;
+ 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");
+
+ use_aio = get_aio_option(opts, flags, &local_err);
+ if (local_err) {
+ error_propagate(errp, local_err);
+ ret = -EINVAL;
+ goto fail;
+ }
+
+ raw_parse_flags(flags, use_aio, &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();
+
+ error_setg_win32(errp, err, "Could not open '%s'", filename);
+ if (err == ERROR_ACCESS_DENIED) {
+ ret = -EACCES;
+ } else {
+ ret = -EINVAL;
+ }
+ goto fail;
+ }
+
+ if (use_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));
+ }
+
+ 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 << BDRV_SECTOR_BITS, qiov,
+ nb_sectors << BDRV_SECTOR_BITS,
+ 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 << BDRV_SECTOR_BITS, qiov,
+ nb_sectors << BDRV_SECTOR_BITS,
+ 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_refresh_limits = raw_probe_alignment,
+ .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;
+ bool use_aio;
+
+ 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");
+
+ use_aio = get_aio_option(opts, flags, &local_err);
+ if (!local_err && use_aio) {
+ error_setg(&local_err, "AIO is not supported on Windows host devices");
+ }
+ if (local_err) {
+ error_propagate(errp, local_err);
+ ret = -EINVAL;
+ goto done;
+ }
+
+ 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, use_aio, &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);
* If @start is in a trailing hole or beyond EOF, return -ENXIO.
* If we can't find out, return a negative errno other than -ENXIO.
*
- * (Shamefully copied from raw-posix.c, only miniscule adaptions.)
+ * (Shamefully copied from file-posix.c, only miniscule adaptions.)
*/
static int find_allocation(BlockDriverState *bs, off_t start,
off_t *data, off_t *hole)
* 'nb_sectors' is the max value 'pnum' should be set to. If nb_sectors goes
* beyond the end of the disk image it will be clamped.
*
- * (Based on raw_co_get_block_status() from raw-posix.c.)
+ * (Based on raw_co_get_block_status() from file-posix.c.)
*/
static int64_t coroutine_fn qemu_gluster_co_get_block_status(
BlockDriverState *bs, int64_t sector_num, int nb_sectors, int *pnum,
+++ /dev/null
-/*
- * Block driver for RAW files (posix)
- *
- * 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/error-report.h"
-#include "qemu/timer.h"
-#include "qemu/log.h"
-#include "block/block_int.h"
-#include "qemu/module.h"
-#include "trace.h"
-#include "block/thread-pool.h"
-#include "qemu/iov.h"
-#include "block/raw-aio.h"
-#include "qapi/util.h"
-#include "qapi/qmp/qstring.h"
-
-#if defined(__APPLE__) && (__MACH__)
-#include <paths.h>
-#include <sys/param.h>
-#include <IOKit/IOKitLib.h>
-#include <IOKit/IOBSD.h>
-#include <IOKit/storage/IOMediaBSDClient.h>
-#include <IOKit/storage/IOMedia.h>
-#include <IOKit/storage/IOCDMedia.h>
-//#include <IOKit/storage/IOCDTypes.h>
-#include <IOKit/storage/IODVDMedia.h>
-#include <CoreFoundation/CoreFoundation.h>
-#endif
-
-#ifdef __sun__
-#define _POSIX_PTHREAD_SEMANTICS 1
-#include <sys/dkio.h>
-#endif
-#ifdef __linux__
-#include <sys/ioctl.h>
-#include <sys/param.h>
-#include <linux/cdrom.h>
-#include <linux/fd.h>
-#include <linux/fs.h>
-#include <linux/hdreg.h>
-#include <scsi/sg.h>
-#ifdef __s390__
-#include <asm/dasd.h>
-#endif
-#ifndef FS_NOCOW_FL
-#define FS_NOCOW_FL 0x00800000 /* Do not cow file */
-#endif
-#endif
-#if defined(CONFIG_FALLOCATE_PUNCH_HOLE) || defined(CONFIG_FALLOCATE_ZERO_RANGE)
-#include <linux/falloc.h>
-#endif
-#if defined (__FreeBSD__) || defined(__FreeBSD_kernel__)
-#include <sys/disk.h>
-#include <sys/cdio.h>
-#endif
-
-#ifdef __OpenBSD__
-#include <sys/ioctl.h>
-#include <sys/disklabel.h>
-#include <sys/dkio.h>
-#endif
-
-#ifdef __NetBSD__
-#include <sys/ioctl.h>
-#include <sys/disklabel.h>
-#include <sys/dkio.h>
-#include <sys/disk.h>
-#endif
-
-#ifdef __DragonFly__
-#include <sys/ioctl.h>
-#include <sys/diskslice.h>
-#endif
-
-#ifdef CONFIG_XFS
-#include <xfs/xfs.h>
-#endif
-
-//#define DEBUG_BLOCK
-
-#ifdef DEBUG_BLOCK
-# define DEBUG_BLOCK_PRINT 1
-#else
-# define DEBUG_BLOCK_PRINT 0
-#endif
-#define DPRINTF(fmt, ...) \
-do { \
- if (DEBUG_BLOCK_PRINT) { \
- printf(fmt, ## __VA_ARGS__); \
- } \
-} while (0)
-
-/* OS X does not have O_DSYNC */
-#ifndef O_DSYNC
-#ifdef O_SYNC
-#define O_DSYNC O_SYNC
-#elif defined(O_FSYNC)
-#define O_DSYNC O_FSYNC
-#endif
-#endif
-
-/* Approximate O_DIRECT with O_DSYNC if O_DIRECT isn't available */
-#ifndef O_DIRECT
-#define O_DIRECT O_DSYNC
-#endif
-
-#define FTYPE_FILE 0
-#define FTYPE_CD 1
-
-#define MAX_BLOCKSIZE 4096
-
-typedef struct BDRVRawState {
- int fd;
- int type;
- int open_flags;
- size_t buf_align;
-
-#ifdef CONFIG_XFS
- bool is_xfs:1;
-#endif
- bool has_discard:1;
- bool has_write_zeroes:1;
- bool discard_zeroes:1;
- bool use_linux_aio:1;
- bool has_fallocate;
- bool needs_alignment;
-} BDRVRawState;
-
-typedef struct BDRVRawReopenState {
- int fd;
- int open_flags;
-} BDRVRawReopenState;
-
-static int fd_open(BlockDriverState *bs);
-static int64_t raw_getlength(BlockDriverState *bs);
-
-typedef struct RawPosixAIOData {
- BlockDriverState *bs;
- int aio_fildes;
- union {
- struct iovec *aio_iov;
- void *aio_ioctl_buf;
- };
- int aio_niov;
- uint64_t aio_nbytes;
-#define aio_ioctl_cmd aio_nbytes /* for QEMU_AIO_IOCTL */
- off_t aio_offset;
- int aio_type;
-} RawPosixAIOData;
-
-#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
-static int cdrom_reopen(BlockDriverState *bs);
-#endif
-
-#if defined(__NetBSD__)
-static int raw_normalize_devicepath(const char **filename)
-{
- static char namebuf[PATH_MAX];
- const char *dp, *fname;
- struct stat sb;
-
- fname = *filename;
- dp = strrchr(fname, '/');
- if (lstat(fname, &sb) < 0) {
- fprintf(stderr, "%s: stat failed: %s\n",
- fname, strerror(errno));
- return -errno;
- }
-
- if (!S_ISBLK(sb.st_mode)) {
- return 0;
- }
-
- if (dp == NULL) {
- snprintf(namebuf, PATH_MAX, "r%s", fname);
- } else {
- snprintf(namebuf, PATH_MAX, "%.*s/r%s",
- (int)(dp - fname), fname, dp + 1);
- }
- fprintf(stderr, "%s is a block device", fname);
- *filename = namebuf;
- fprintf(stderr, ", using %s\n", *filename);
-
- return 0;
-}
-#else
-static int raw_normalize_devicepath(const char **filename)
-{
- return 0;
-}
-#endif
-
-/*
- * Get logical block size via ioctl. On success store it in @sector_size_p.
- */
-static int probe_logical_blocksize(int fd, unsigned int *sector_size_p)
-{
- unsigned int sector_size;
- bool success = false;
-
- errno = ENOTSUP;
-
- /* Try a few ioctls to get the right size */
-#ifdef BLKSSZGET
- if (ioctl(fd, BLKSSZGET, §or_size) >= 0) {
- *sector_size_p = sector_size;
- success = true;
- }
-#endif
-#ifdef DKIOCGETBLOCKSIZE
- if (ioctl(fd, DKIOCGETBLOCKSIZE, §or_size) >= 0) {
- *sector_size_p = sector_size;
- success = true;
- }
-#endif
-#ifdef DIOCGSECTORSIZE
- if (ioctl(fd, DIOCGSECTORSIZE, §or_size) >= 0) {
- *sector_size_p = sector_size;
- success = true;
- }
-#endif
-
- return success ? 0 : -errno;
-}
-
-/**
- * Get physical block size of @fd.
- * On success, store it in @blk_size and return 0.
- * On failure, return -errno.
- */
-static int probe_physical_blocksize(int fd, unsigned int *blk_size)
-{
-#ifdef BLKPBSZGET
- if (ioctl(fd, BLKPBSZGET, blk_size) < 0) {
- return -errno;
- }
- return 0;
-#else
- return -ENOTSUP;
-#endif
-}
-
-/* Check if read is allowed with given memory buffer and length.
- *
- * This function is used to check O_DIRECT memory buffer and request alignment.
- */
-static bool raw_is_io_aligned(int fd, void *buf, size_t len)
-{
- ssize_t ret = pread(fd, buf, len, 0);
-
- if (ret >= 0) {
- return true;
- }
-
-#ifdef __linux__
- /* The Linux kernel returns EINVAL for misaligned O_DIRECT reads. Ignore
- * other errors (e.g. real I/O error), which could happen on a failed
- * drive, since we only care about probing alignment.
- */
- if (errno != EINVAL) {
- return true;
- }
-#endif
-
- return false;
-}
-
-static void raw_probe_alignment(BlockDriverState *bs, int fd, Error **errp)
-{
- BDRVRawState *s = bs->opaque;
- char *buf;
- size_t max_align = MAX(MAX_BLOCKSIZE, getpagesize());
-
- /* For SCSI generic devices the alignment is not really used.
- With buffered I/O, we don't have any restrictions. */
- if (bdrv_is_sg(bs) || !s->needs_alignment) {
- bs->bl.request_alignment = 1;
- s->buf_align = 1;
- return;
- }
-
- bs->bl.request_alignment = 0;
- s->buf_align = 0;
- /* Let's try to use the logical blocksize for the alignment. */
- if (probe_logical_blocksize(fd, &bs->bl.request_alignment) < 0) {
- bs->bl.request_alignment = 0;
- }
-#ifdef CONFIG_XFS
- if (s->is_xfs) {
- struct dioattr da;
- if (xfsctl(NULL, fd, XFS_IOC_DIOINFO, &da) >= 0) {
- bs->bl.request_alignment = da.d_miniosz;
- /* The kernel returns wrong information for d_mem */
- /* s->buf_align = da.d_mem; */
- }
- }
-#endif
-
- /* If we could not get the sizes so far, we can only guess them */
- if (!s->buf_align) {
- size_t align;
- buf = qemu_memalign(max_align, 2 * max_align);
- for (align = 512; align <= max_align; align <<= 1) {
- if (raw_is_io_aligned(fd, buf + align, max_align)) {
- s->buf_align = align;
- break;
- }
- }
- qemu_vfree(buf);
- }
-
- if (!bs->bl.request_alignment) {
- size_t align;
- buf = qemu_memalign(s->buf_align, max_align);
- for (align = 512; align <= max_align; align <<= 1) {
- if (raw_is_io_aligned(fd, buf, align)) {
- bs->bl.request_alignment = align;
- break;
- }
- }
- qemu_vfree(buf);
- }
-
- if (!s->buf_align || !bs->bl.request_alignment) {
- error_setg(errp, "Could not find working O_DIRECT alignment");
- error_append_hint(errp, "Try cache.direct=off\n");
- }
-}
-
-static void raw_parse_flags(int bdrv_flags, int *open_flags)
-{
- assert(open_flags != NULL);
-
- *open_flags |= O_BINARY;
- *open_flags &= ~O_ACCMODE;
- if (bdrv_flags & BDRV_O_RDWR) {
- *open_flags |= O_RDWR;
- } else {
- *open_flags |= O_RDONLY;
- }
-
- /* Use O_DSYNC for write-through caching, no flags for write-back caching,
- * and O_DIRECT for no caching. */
- if ((bdrv_flags & BDRV_O_NOCACHE)) {
- *open_flags |= O_DIRECT;
- }
-}
-
-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",
- },
- {
- .name = "aio",
- .type = QEMU_OPT_STRING,
- .help = "host AIO implementation (threads, native)",
- },
- { /* end of list */ }
- },
-};
-
-static int raw_open_common(BlockDriverState *bs, QDict *options,
- int bdrv_flags, int open_flags, Error **errp)
-{
- BDRVRawState *s = bs->opaque;
- QemuOpts *opts;
- Error *local_err = NULL;
- const char *filename = NULL;
- BlockdevAioOptions aio, aio_default;
- int fd, ret;
- struct stat st;
-
- 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");
-
- ret = raw_normalize_devicepath(&filename);
- if (ret != 0) {
- error_setg_errno(errp, -ret, "Could not normalize device path");
- goto fail;
- }
-
- aio_default = (bdrv_flags & BDRV_O_NATIVE_AIO)
- ? BLOCKDEV_AIO_OPTIONS_NATIVE
- : BLOCKDEV_AIO_OPTIONS_THREADS;
- aio = qapi_enum_parse(BlockdevAioOptions_lookup, qemu_opt_get(opts, "aio"),
- BLOCKDEV_AIO_OPTIONS__MAX, aio_default, &local_err);
- if (local_err) {
- error_propagate(errp, local_err);
- ret = -EINVAL;
- goto fail;
- }
- s->use_linux_aio = (aio == BLOCKDEV_AIO_OPTIONS_NATIVE);
-
- s->open_flags = open_flags;
- raw_parse_flags(bdrv_flags, &s->open_flags);
-
- s->fd = -1;
- fd = qemu_open(filename, s->open_flags, 0644);
- if (fd < 0) {
- ret = -errno;
- error_setg_errno(errp, errno, "Could not open '%s'", filename);
- if (ret == -EROFS) {
- ret = -EACCES;
- }
- goto fail;
- }
- s->fd = fd;
-
-#ifdef CONFIG_LINUX_AIO
- /* Currently Linux does AIO only for files opened with O_DIRECT */
- if (s->use_linux_aio && !(s->open_flags & O_DIRECT)) {
- error_setg(errp, "aio=native was specified, but it requires "
- "cache.direct=on, which was not specified.");
- ret = -EINVAL;
- goto fail;
- }
-#else
- if (s->use_linux_aio) {
- error_setg(errp, "aio=native was specified, but is not supported "
- "in this build.");
- ret = -EINVAL;
- goto fail;
- }
-#endif /* !defined(CONFIG_LINUX_AIO) */
-
- s->has_discard = true;
- s->has_write_zeroes = true;
- bs->supported_zero_flags = BDRV_REQ_MAY_UNMAP;
- if ((bs->open_flags & BDRV_O_NOCACHE) != 0) {
- s->needs_alignment = true;
- }
-
- if (fstat(s->fd, &st) < 0) {
- ret = -errno;
- error_setg_errno(errp, errno, "Could not stat file");
- goto fail;
- }
- if (S_ISREG(st.st_mode)) {
- s->discard_zeroes = true;
- s->has_fallocate = true;
- }
- if (S_ISBLK(st.st_mode)) {
-#ifdef BLKDISCARDZEROES
- unsigned int arg;
- if (ioctl(s->fd, BLKDISCARDZEROES, &arg) == 0 && arg) {
- s->discard_zeroes = true;
- }
-#endif
-#ifdef __linux__
- /* On Linux 3.10, BLKDISCARD leaves stale data in the page cache. Do
- * not rely on the contents of discarded blocks unless using O_DIRECT.
- * Same for BLKZEROOUT.
- */
- if (!(bs->open_flags & BDRV_O_NOCACHE)) {
- s->discard_zeroes = false;
- s->has_write_zeroes = false;
- }
-#endif
- }
-#ifdef __FreeBSD__
- if (S_ISCHR(st.st_mode)) {
- /*
- * The file is a char device (disk), which on FreeBSD isn't behind
- * a pager, so force all requests to be aligned. This is needed
- * so QEMU makes sure all IO operations on the device are aligned
- * to sector size, or else FreeBSD will reject them with EINVAL.
- */
- s->needs_alignment = true;
- }
-#endif
-
-#ifdef CONFIG_XFS
- if (platform_test_xfs_fd(s->fd)) {
- s->is_xfs = true;
- }
-#endif
-
- ret = 0;
-fail:
- if (filename && (bdrv_flags & BDRV_O_TEMPORARY)) {
- unlink(filename);
- }
- qemu_opts_del(opts);
- return ret;
-}
-
-static int raw_open(BlockDriverState *bs, QDict *options, int flags,
- Error **errp)
-{
- BDRVRawState *s = bs->opaque;
-
- s->type = FTYPE_FILE;
- return raw_open_common(bs, options, flags, 0, errp);
-}
-
-static int raw_reopen_prepare(BDRVReopenState *state,
- BlockReopenQueue *queue, Error **errp)
-{
- BDRVRawState *s;
- BDRVRawReopenState *rs;
- int ret = 0;
- Error *local_err = NULL;
-
- assert(state != NULL);
- assert(state->bs != NULL);
-
- s = state->bs->opaque;
-
- state->opaque = g_new0(BDRVRawReopenState, 1);
- rs = state->opaque;
-
- if (s->type == FTYPE_CD) {
- rs->open_flags |= O_NONBLOCK;
- }
-
- raw_parse_flags(state->flags, &rs->open_flags);
-
- rs->fd = -1;
-
- int fcntl_flags = O_APPEND | O_NONBLOCK;
-#ifdef O_NOATIME
- fcntl_flags |= O_NOATIME;
-#endif
-
-#ifdef O_ASYNC
- /* Not all operating systems have O_ASYNC, and those that don't
- * will not let us track the state into rs->open_flags (typically
- * you achieve the same effect with an ioctl, for example I_SETSIG
- * on Solaris). But we do not use O_ASYNC, so that's fine.
- */
- assert((s->open_flags & O_ASYNC) == 0);
-#endif
-
- if ((rs->open_flags & ~fcntl_flags) == (s->open_flags & ~fcntl_flags)) {
- /* dup the original fd */
- rs->fd = qemu_dup(s->fd);
- if (rs->fd >= 0) {
- ret = fcntl_setfl(rs->fd, rs->open_flags);
- if (ret) {
- qemu_close(rs->fd);
- rs->fd = -1;
- }
- }
- }
-
- /* If we cannot use fcntl, or fcntl failed, fall back to qemu_open() */
- if (rs->fd == -1) {
- const char *normalized_filename = state->bs->filename;
- ret = raw_normalize_devicepath(&normalized_filename);
- if (ret < 0) {
- error_setg_errno(errp, -ret, "Could not normalize device path");
- } else {
- assert(!(rs->open_flags & O_CREAT));
- rs->fd = qemu_open(normalized_filename, rs->open_flags);
- if (rs->fd == -1) {
- error_setg_errno(errp, errno, "Could not reopen file");
- ret = -1;
- }
- }
- }
-
- /* Fail already reopen_prepare() if we can't get a working O_DIRECT
- * alignment with the new fd. */
- if (rs->fd != -1) {
- raw_probe_alignment(state->bs, rs->fd, &local_err);
- if (local_err) {
- qemu_close(rs->fd);
- rs->fd = -1;
- error_propagate(errp, local_err);
- ret = -EINVAL;
- }
- }
-
- return ret;
-}
-
-static void raw_reopen_commit(BDRVReopenState *state)
-{
- BDRVRawReopenState *rs = state->opaque;
- BDRVRawState *s = state->bs->opaque;
-
- s->open_flags = rs->open_flags;
-
- qemu_close(s->fd);
- s->fd = rs->fd;
-
- g_free(state->opaque);
- state->opaque = NULL;
-}
-
-
-static void raw_reopen_abort(BDRVReopenState *state)
-{
- BDRVRawReopenState *rs = state->opaque;
-
- /* nothing to do if NULL, we didn't get far enough */
- if (rs == NULL) {
- return;
- }
-
- if (rs->fd >= 0) {
- qemu_close(rs->fd);
- rs->fd = -1;
- }
- g_free(state->opaque);
- state->opaque = NULL;
-}
-
-static int hdev_get_max_transfer_length(int fd)
-{
-#ifdef BLKSECTGET
- int max_sectors = 0;
- if (ioctl(fd, BLKSECTGET, &max_sectors) == 0) {
- return max_sectors;
- } else {
- return -errno;
- }
-#else
- return -ENOSYS;
-#endif
-}
-
-static void raw_refresh_limits(BlockDriverState *bs, Error **errp)
-{
- BDRVRawState *s = bs->opaque;
- struct stat st;
-
- if (!fstat(s->fd, &st)) {
- if (S_ISBLK(st.st_mode)) {
- int ret = hdev_get_max_transfer_length(s->fd);
- if (ret > 0 && ret <= BDRV_REQUEST_MAX_SECTORS) {
- bs->bl.max_transfer = pow2floor(ret << BDRV_SECTOR_BITS);
- }
- }
- }
-
- raw_probe_alignment(bs, s->fd, errp);
- bs->bl.min_mem_alignment = s->buf_align;
- bs->bl.opt_mem_alignment = MAX(s->buf_align, getpagesize());
-}
-
-static int check_for_dasd(int fd)
-{
-#ifdef BIODASDINFO2
- struct dasd_information2_t info = {0};
-
- return ioctl(fd, BIODASDINFO2, &info);
-#else
- return -1;
-#endif
-}
-
-/**
- * Try to get @bs's logical and physical block size.
- * On success, store them in @bsz and return zero.
- * On failure, return negative errno.
- */
-static int hdev_probe_blocksizes(BlockDriverState *bs, BlockSizes *bsz)
-{
- BDRVRawState *s = bs->opaque;
- int ret;
-
- /* If DASD, get blocksizes */
- if (check_for_dasd(s->fd) < 0) {
- return -ENOTSUP;
- }
- ret = probe_logical_blocksize(s->fd, &bsz->log);
- if (ret < 0) {
- return ret;
- }
- return probe_physical_blocksize(s->fd, &bsz->phys);
-}
-
-/**
- * Try to get @bs's geometry: cyls, heads, sectors.
- * On success, store them in @geo and return 0.
- * On failure return -errno.
- * (Allows block driver to assign default geometry values that guest sees)
- */
-#ifdef __linux__
-static int hdev_probe_geometry(BlockDriverState *bs, HDGeometry *geo)
-{
- BDRVRawState *s = bs->opaque;
- struct hd_geometry ioctl_geo = {0};
-
- /* If DASD, get its geometry */
- if (check_for_dasd(s->fd) < 0) {
- return -ENOTSUP;
- }
- if (ioctl(s->fd, HDIO_GETGEO, &ioctl_geo) < 0) {
- return -errno;
- }
- /* HDIO_GETGEO may return success even though geo contains zeros
- (e.g. certain multipath setups) */
- if (!ioctl_geo.heads || !ioctl_geo.sectors || !ioctl_geo.cylinders) {
- return -ENOTSUP;
- }
- /* Do not return a geometry for partition */
- if (ioctl_geo.start != 0) {
- return -ENOTSUP;
- }
- geo->heads = ioctl_geo.heads;
- geo->sectors = ioctl_geo.sectors;
- geo->cylinders = ioctl_geo.cylinders;
-
- return 0;
-}
-#else /* __linux__ */
-static int hdev_probe_geometry(BlockDriverState *bs, HDGeometry *geo)
-{
- return -ENOTSUP;
-}
-#endif
-
-static ssize_t handle_aiocb_ioctl(RawPosixAIOData *aiocb)
-{
- int ret;
-
- ret = ioctl(aiocb->aio_fildes, aiocb->aio_ioctl_cmd, aiocb->aio_ioctl_buf);
- if (ret == -1) {
- return -errno;
- }
-
- return 0;
-}
-
-static ssize_t handle_aiocb_flush(RawPosixAIOData *aiocb)
-{
- int ret;
-
- ret = qemu_fdatasync(aiocb->aio_fildes);
- if (ret == -1) {
- return -errno;
- }
- return 0;
-}
-
-#ifdef CONFIG_PREADV
-
-static bool preadv_present = true;
-
-static ssize_t
-qemu_preadv(int fd, const struct iovec *iov, int nr_iov, off_t offset)
-{
- return preadv(fd, iov, nr_iov, offset);
-}
-
-static ssize_t
-qemu_pwritev(int fd, const struct iovec *iov, int nr_iov, off_t offset)
-{
- return pwritev(fd, iov, nr_iov, offset);
-}
-
-#else
-
-static bool preadv_present = false;
-
-static ssize_t
-qemu_preadv(int fd, const struct iovec *iov, int nr_iov, off_t offset)
-{
- return -ENOSYS;
-}
-
-static ssize_t
-qemu_pwritev(int fd, const struct iovec *iov, int nr_iov, off_t offset)
-{
- return -ENOSYS;
-}
-
-#endif
-
-static ssize_t handle_aiocb_rw_vector(RawPosixAIOData *aiocb)
-{
- ssize_t len;
-
- do {
- if (aiocb->aio_type & QEMU_AIO_WRITE)
- len = qemu_pwritev(aiocb->aio_fildes,
- aiocb->aio_iov,
- aiocb->aio_niov,
- aiocb->aio_offset);
- else
- len = qemu_preadv(aiocb->aio_fildes,
- aiocb->aio_iov,
- aiocb->aio_niov,
- aiocb->aio_offset);
- } while (len == -1 && errno == EINTR);
-
- if (len == -1) {
- return -errno;
- }
- return len;
-}
-
-/*
- * 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 ssize_t handle_aiocb_rw_linear(RawPosixAIOData *aiocb, char *buf)
-{
- ssize_t offset = 0;
- ssize_t len;
-
- while (offset < aiocb->aio_nbytes) {
- if (aiocb->aio_type & QEMU_AIO_WRITE) {
- len = pwrite(aiocb->aio_fildes,
- (const char *)buf + offset,
- aiocb->aio_nbytes - offset,
- aiocb->aio_offset + offset);
- } else {
- len = pread(aiocb->aio_fildes,
- buf + offset,
- aiocb->aio_nbytes - offset,
- aiocb->aio_offset + offset);
- }
- if (len == -1 && errno == EINTR) {
- continue;
- } else if (len == -1 && errno == EINVAL &&
- (aiocb->bs->open_flags & BDRV_O_NOCACHE) &&
- !(aiocb->aio_type & QEMU_AIO_WRITE) &&
- offset > 0) {
- /* O_DIRECT pread() may fail with EINVAL when offset is unaligned
- * after a short read. Assume that O_DIRECT short reads only occur
- * at EOF. Therefore this is a short read, not an I/O error.
- */
- break;
- } else if (len == -1) {
- offset = -errno;
- break;
- } else if (len == 0) {
- break;
- }
- offset += len;
- }
-
- return offset;
-}
-
-static ssize_t handle_aiocb_rw(RawPosixAIOData *aiocb)
-{
- ssize_t nbytes;
- char *buf;
-
- if (!(aiocb->aio_type & QEMU_AIO_MISALIGNED)) {
- /*
- * If there is just a single buffer, and it is properly aligned
- * we can just use plain pread/pwrite without any problems.
- */
- if (aiocb->aio_niov == 1) {
- return handle_aiocb_rw_linear(aiocb, aiocb->aio_iov->iov_base);
- }
- /*
- * We have more than one iovec, and all are properly aligned.
- *
- * Try preadv/pwritev first and fall back to linearizing the
- * buffer if it's not supported.
- */
- if (preadv_present) {
- nbytes = handle_aiocb_rw_vector(aiocb);
- if (nbytes == aiocb->aio_nbytes ||
- (nbytes < 0 && nbytes != -ENOSYS)) {
- return nbytes;
- }
- preadv_present = false;
- }
-
- /*
- * XXX(hch): short read/write. no easy way to handle the reminder
- * using these interfaces. For now retry using plain
- * pread/pwrite?
- */
- }
-
- /*
- * Ok, we have to do it the hard way, copy all segments into
- * a single aligned buffer.
- */
- buf = qemu_try_blockalign(aiocb->bs, aiocb->aio_nbytes);
- if (buf == NULL) {
- return -ENOMEM;
- }
-
- if (aiocb->aio_type & QEMU_AIO_WRITE) {
- char *p = buf;
- int i;
-
- for (i = 0; i < aiocb->aio_niov; ++i) {
- memcpy(p, aiocb->aio_iov[i].iov_base, aiocb->aio_iov[i].iov_len);
- p += aiocb->aio_iov[i].iov_len;
- }
- assert(p - buf == aiocb->aio_nbytes);
- }
-
- nbytes = handle_aiocb_rw_linear(aiocb, buf);
- if (!(aiocb->aio_type & QEMU_AIO_WRITE)) {
- char *p = buf;
- size_t count = aiocb->aio_nbytes, copy;
- int i;
-
- for (i = 0; i < aiocb->aio_niov && count; ++i) {
- copy = count;
- if (copy > aiocb->aio_iov[i].iov_len) {
- copy = aiocb->aio_iov[i].iov_len;
- }
- memcpy(aiocb->aio_iov[i].iov_base, p, copy);
- assert(count >= copy);
- p += copy;
- count -= copy;
- }
- assert(count == 0);
- }
- qemu_vfree(buf);
-
- return nbytes;
-}
-
-#ifdef CONFIG_XFS
-static int xfs_write_zeroes(BDRVRawState *s, int64_t offset, uint64_t bytes)
-{
- struct xfs_flock64 fl;
- int err;
-
- memset(&fl, 0, sizeof(fl));
- fl.l_whence = SEEK_SET;
- fl.l_start = offset;
- fl.l_len = bytes;
-
- if (xfsctl(NULL, s->fd, XFS_IOC_ZERO_RANGE, &fl) < 0) {
- err = errno;
- DPRINTF("cannot write zero range (%s)\n", strerror(errno));
- return -err;
- }
-
- return 0;
-}
-
-static int xfs_discard(BDRVRawState *s, int64_t offset, uint64_t bytes)
-{
- struct xfs_flock64 fl;
- int err;
-
- memset(&fl, 0, sizeof(fl));
- fl.l_whence = SEEK_SET;
- fl.l_start = offset;
- fl.l_len = bytes;
-
- if (xfsctl(NULL, s->fd, XFS_IOC_UNRESVSP64, &fl) < 0) {
- err = errno;
- DPRINTF("cannot punch hole (%s)\n", strerror(errno));
- return -err;
- }
-
- return 0;
-}
-#endif
-
-static int translate_err(int err)
-{
- if (err == -ENODEV || err == -ENOSYS || err == -EOPNOTSUPP ||
- err == -ENOTTY) {
- err = -ENOTSUP;
- }
- return err;
-}
-
-#ifdef CONFIG_FALLOCATE
-static int do_fallocate(int fd, int mode, off_t offset, off_t len)
-{
- do {
- if (fallocate(fd, mode, offset, len) == 0) {
- return 0;
- }
- } while (errno == EINTR);
- return translate_err(-errno);
-}
-#endif
-
-static ssize_t handle_aiocb_write_zeroes_block(RawPosixAIOData *aiocb)
-{
- int ret = -ENOTSUP;
- BDRVRawState *s = aiocb->bs->opaque;
-
- if (!s->has_write_zeroes) {
- return -ENOTSUP;
- }
-
-#ifdef BLKZEROOUT
- do {
- uint64_t range[2] = { aiocb->aio_offset, aiocb->aio_nbytes };
- if (ioctl(aiocb->aio_fildes, BLKZEROOUT, range) == 0) {
- return 0;
- }
- } while (errno == EINTR);
-
- ret = translate_err(-errno);
-#endif
-
- if (ret == -ENOTSUP) {
- s->has_write_zeroes = false;
- }
- return ret;
-}
-
-static ssize_t handle_aiocb_write_zeroes(RawPosixAIOData *aiocb)
-{
-#if defined(CONFIG_FALLOCATE) || defined(CONFIG_XFS)
- BDRVRawState *s = aiocb->bs->opaque;
-#endif
-
- if (aiocb->aio_type & QEMU_AIO_BLKDEV) {
- return handle_aiocb_write_zeroes_block(aiocb);
- }
-
-#ifdef CONFIG_XFS
- if (s->is_xfs) {
- return xfs_write_zeroes(s, aiocb->aio_offset, aiocb->aio_nbytes);
- }
-#endif
-
-#ifdef CONFIG_FALLOCATE_ZERO_RANGE
- if (s->has_write_zeroes) {
- int ret = do_fallocate(s->fd, FALLOC_FL_ZERO_RANGE,
- aiocb->aio_offset, aiocb->aio_nbytes);
- if (ret == 0 || ret != -ENOTSUP) {
- return ret;
- }
- s->has_write_zeroes = false;
- }
-#endif
-
-#ifdef CONFIG_FALLOCATE_PUNCH_HOLE
- if (s->has_discard && s->has_fallocate) {
- int ret = do_fallocate(s->fd,
- FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE,
- aiocb->aio_offset, aiocb->aio_nbytes);
- if (ret == 0) {
- ret = do_fallocate(s->fd, 0, aiocb->aio_offset, aiocb->aio_nbytes);
- if (ret == 0 || ret != -ENOTSUP) {
- return ret;
- }
- s->has_fallocate = false;
- } else if (ret != -ENOTSUP) {
- return ret;
- } else {
- s->has_discard = false;
- }
- }
-#endif
-
-#ifdef CONFIG_FALLOCATE
- if (s->has_fallocate && aiocb->aio_offset >= bdrv_getlength(aiocb->bs)) {
- int ret = do_fallocate(s->fd, 0, aiocb->aio_offset, aiocb->aio_nbytes);
- if (ret == 0 || ret != -ENOTSUP) {
- return ret;
- }
- s->has_fallocate = false;
- }
-#endif
-
- return -ENOTSUP;
-}
-
-static ssize_t handle_aiocb_discard(RawPosixAIOData *aiocb)
-{
- int ret = -EOPNOTSUPP;
- BDRVRawState *s = aiocb->bs->opaque;
-
- if (!s->has_discard) {
- return -ENOTSUP;
- }
-
- if (aiocb->aio_type & QEMU_AIO_BLKDEV) {
-#ifdef BLKDISCARD
- do {
- uint64_t range[2] = { aiocb->aio_offset, aiocb->aio_nbytes };
- if (ioctl(aiocb->aio_fildes, BLKDISCARD, range) == 0) {
- return 0;
- }
- } while (errno == EINTR);
-
- ret = -errno;
-#endif
- } else {
-#ifdef CONFIG_XFS
- if (s->is_xfs) {
- return xfs_discard(s, aiocb->aio_offset, aiocb->aio_nbytes);
- }
-#endif
-
-#ifdef CONFIG_FALLOCATE_PUNCH_HOLE
- ret = do_fallocate(s->fd, FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE,
- aiocb->aio_offset, aiocb->aio_nbytes);
-#endif
- }
-
- ret = translate_err(ret);
- if (ret == -ENOTSUP) {
- s->has_discard = false;
- }
- return ret;
-}
-
-static int aio_worker(void *arg)
-{
- RawPosixAIOData *aiocb = arg;
- ssize_t ret = 0;
-
- switch (aiocb->aio_type & QEMU_AIO_TYPE_MASK) {
- case QEMU_AIO_READ:
- ret = handle_aiocb_rw(aiocb);
- if (ret >= 0 && ret < aiocb->aio_nbytes) {
- iov_memset(aiocb->aio_iov, aiocb->aio_niov, ret,
- 0, aiocb->aio_nbytes - ret);
-
- ret = aiocb->aio_nbytes;
- }
- if (ret == aiocb->aio_nbytes) {
- ret = 0;
- } else if (ret >= 0 && ret < aiocb->aio_nbytes) {
- ret = -EINVAL;
- }
- break;
- case QEMU_AIO_WRITE:
- ret = handle_aiocb_rw(aiocb);
- if (ret == aiocb->aio_nbytes) {
- ret = 0;
- } else if (ret >= 0 && ret < aiocb->aio_nbytes) {
- ret = -EINVAL;
- }
- break;
- case QEMU_AIO_FLUSH:
- ret = handle_aiocb_flush(aiocb);
- break;
- case QEMU_AIO_IOCTL:
- ret = handle_aiocb_ioctl(aiocb);
- break;
- case QEMU_AIO_DISCARD:
- ret = handle_aiocb_discard(aiocb);
- break;
- case QEMU_AIO_WRITE_ZEROES:
- ret = handle_aiocb_write_zeroes(aiocb);
- break;
- default:
- fprintf(stderr, "invalid aio request (0x%x)\n", aiocb->aio_type);
- ret = -EINVAL;
- break;
- }
-
- g_free(aiocb);
- return ret;
-}
-
-static int paio_submit_co(BlockDriverState *bs, int fd,
- int64_t offset, QEMUIOVector *qiov,
- int count, int type)
-{
- RawPosixAIOData *acb = g_new(RawPosixAIOData, 1);
- ThreadPool *pool;
-
- acb->bs = bs;
- acb->aio_type = type;
- acb->aio_fildes = fd;
-
- acb->aio_nbytes = count;
- acb->aio_offset = offset;
-
- if (qiov) {
- acb->aio_iov = qiov->iov;
- acb->aio_niov = qiov->niov;
- assert(qiov->size == count);
- }
-
- trace_paio_submit_co(offset, count, type);
- pool = aio_get_thread_pool(bdrv_get_aio_context(bs));
- return thread_pool_submit_co(pool, aio_worker, acb);
-}
-
-static BlockAIOCB *paio_submit(BlockDriverState *bs, int fd,
- int64_t offset, QEMUIOVector *qiov, int count,
- BlockCompletionFunc *cb, void *opaque, int type)
-{
- RawPosixAIOData *acb = g_new(RawPosixAIOData, 1);
- ThreadPool *pool;
-
- acb->bs = bs;
- acb->aio_type = type;
- acb->aio_fildes = fd;
-
- acb->aio_nbytes = count;
- acb->aio_offset = offset;
-
- if (qiov) {
- acb->aio_iov = qiov->iov;
- acb->aio_niov = qiov->niov;
- assert(qiov->size == acb->aio_nbytes);
- }
-
- trace_paio_submit(acb, opaque, offset, count, type);
- pool = aio_get_thread_pool(bdrv_get_aio_context(bs));
- return thread_pool_submit_aio(pool, aio_worker, acb, cb, opaque);
-}
-
-static int coroutine_fn raw_co_prw(BlockDriverState *bs, uint64_t offset,
- uint64_t bytes, QEMUIOVector *qiov, int type)
-{
- BDRVRawState *s = bs->opaque;
-
- if (fd_open(bs) < 0)
- return -EIO;
-
- /*
- * Check if the underlying device requires requests to be aligned,
- * and if the request we are trying to submit is aligned or not.
- * If this is the case tell the low-level driver that it needs
- * to copy the buffer.
- */
- if (s->needs_alignment) {
- if (!bdrv_qiov_is_aligned(bs, qiov)) {
- type |= QEMU_AIO_MISALIGNED;
-#ifdef CONFIG_LINUX_AIO
- } else if (s->use_linux_aio) {
- LinuxAioState *aio = aio_get_linux_aio(bdrv_get_aio_context(bs));
- assert(qiov->size == bytes);
- return laio_co_submit(bs, aio, s->fd, offset, qiov, type);
-#endif
- }
- }
-
- return paio_submit_co(bs, s->fd, offset, qiov, bytes, type);
-}
-
-static int coroutine_fn raw_co_preadv(BlockDriverState *bs, uint64_t offset,
- uint64_t bytes, QEMUIOVector *qiov,
- int flags)
-{
- return raw_co_prw(bs, offset, bytes, qiov, QEMU_AIO_READ);
-}
-
-static int coroutine_fn raw_co_pwritev(BlockDriverState *bs, uint64_t offset,
- uint64_t bytes, QEMUIOVector *qiov,
- int flags)
-{
- assert(flags == 0);
- return raw_co_prw(bs, offset, bytes, qiov, QEMU_AIO_WRITE);
-}
-
-static void raw_aio_plug(BlockDriverState *bs)
-{
-#ifdef CONFIG_LINUX_AIO
- BDRVRawState *s = bs->opaque;
- if (s->use_linux_aio) {
- LinuxAioState *aio = aio_get_linux_aio(bdrv_get_aio_context(bs));
- laio_io_plug(bs, aio);
- }
-#endif
-}
-
-static void raw_aio_unplug(BlockDriverState *bs)
-{
-#ifdef CONFIG_LINUX_AIO
- BDRVRawState *s = bs->opaque;
- if (s->use_linux_aio) {
- LinuxAioState *aio = aio_get_linux_aio(bdrv_get_aio_context(bs));
- laio_io_unplug(bs, aio);
- }
-#endif
-}
-
-static BlockAIOCB *raw_aio_flush(BlockDriverState *bs,
- BlockCompletionFunc *cb, void *opaque)
-{
- BDRVRawState *s = bs->opaque;
-
- if (fd_open(bs) < 0)
- return NULL;
-
- return paio_submit(bs, s->fd, 0, NULL, 0, cb, opaque, QEMU_AIO_FLUSH);
-}
-
-static void raw_close(BlockDriverState *bs)
-{
- BDRVRawState *s = bs->opaque;
-
- if (s->fd >= 0) {
- qemu_close(s->fd);
- s->fd = -1;
- }
-}
-
-static int raw_truncate(BlockDriverState *bs, int64_t offset)
-{
- BDRVRawState *s = bs->opaque;
- struct stat st;
-
- if (fstat(s->fd, &st)) {
- return -errno;
- }
-
- if (S_ISREG(st.st_mode)) {
- if (ftruncate(s->fd, offset) < 0) {
- return -errno;
- }
- } else if (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode)) {
- if (offset > raw_getlength(bs)) {
- return -EINVAL;
- }
- } else {
- return -ENOTSUP;
- }
-
- return 0;
-}
-
-#ifdef __OpenBSD__
-static int64_t raw_getlength(BlockDriverState *bs)
-{
- BDRVRawState *s = bs->opaque;
- int fd = s->fd;
- struct stat st;
-
- if (fstat(fd, &st))
- return -errno;
- if (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode)) {
- struct disklabel dl;
-
- if (ioctl(fd, DIOCGDINFO, &dl))
- return -errno;
- return (uint64_t)dl.d_secsize *
- dl.d_partitions[DISKPART(st.st_rdev)].p_size;
- } else
- return st.st_size;
-}
-#elif defined(__NetBSD__)
-static int64_t raw_getlength(BlockDriverState *bs)
-{
- BDRVRawState *s = bs->opaque;
- int fd = s->fd;
- struct stat st;
-
- if (fstat(fd, &st))
- return -errno;
- if (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode)) {
- struct dkwedge_info dkw;
-
- if (ioctl(fd, DIOCGWEDGEINFO, &dkw) != -1) {
- return dkw.dkw_size * 512;
- } else {
- struct disklabel dl;
-
- if (ioctl(fd, DIOCGDINFO, &dl))
- return -errno;
- return (uint64_t)dl.d_secsize *
- dl.d_partitions[DISKPART(st.st_rdev)].p_size;
- }
- } else
- return st.st_size;
-}
-#elif defined(__sun__)
-static int64_t raw_getlength(BlockDriverState *bs)
-{
- BDRVRawState *s = bs->opaque;
- struct dk_minfo minfo;
- int ret;
- int64_t size;
-
- ret = fd_open(bs);
- if (ret < 0) {
- return ret;
- }
-
- /*
- * Use the DKIOCGMEDIAINFO ioctl to read the size.
- */
- ret = ioctl(s->fd, DKIOCGMEDIAINFO, &minfo);
- if (ret != -1) {
- return minfo.dki_lbsize * minfo.dki_capacity;
- }
-
- /*
- * There are reports that lseek on some devices fails, but
- * irc discussion said that contingency on contingency was overkill.
- */
- size = lseek(s->fd, 0, SEEK_END);
- if (size < 0) {
- return -errno;
- }
- return size;
-}
-#elif defined(CONFIG_BSD)
-static int64_t raw_getlength(BlockDriverState *bs)
-{
- BDRVRawState *s = bs->opaque;
- int fd = s->fd;
- int64_t size;
- struct stat sb;
-#if defined (__FreeBSD__) || defined(__FreeBSD_kernel__)
- int reopened = 0;
-#endif
- int ret;
-
- ret = fd_open(bs);
- if (ret < 0)
- return ret;
-
-#if defined (__FreeBSD__) || defined(__FreeBSD_kernel__)
-again:
-#endif
- if (!fstat(fd, &sb) && (S_IFCHR & sb.st_mode)) {
-#ifdef DIOCGMEDIASIZE
- if (ioctl(fd, DIOCGMEDIASIZE, (off_t *)&size))
-#elif defined(DIOCGPART)
- {
- struct partinfo pi;
- if (ioctl(fd, DIOCGPART, &pi) == 0)
- size = pi.media_size;
- else
- size = 0;
- }
- if (size == 0)
-#endif
-#if defined(__APPLE__) && defined(__MACH__)
- {
- uint64_t sectors = 0;
- uint32_t sector_size = 0;
-
- if (ioctl(fd, DKIOCGETBLOCKCOUNT, §ors) == 0
- && ioctl(fd, DKIOCGETBLOCKSIZE, §or_size) == 0) {
- size = sectors * sector_size;
- } else {
- size = lseek(fd, 0LL, SEEK_END);
- if (size < 0) {
- return -errno;
- }
- }
- }
-#else
- size = lseek(fd, 0LL, SEEK_END);
- if (size < 0) {
- return -errno;
- }
-#endif
-#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
- switch(s->type) {
- case FTYPE_CD:
- /* XXX FreeBSD acd returns UINT_MAX sectors for an empty drive */
- if (size == 2048LL * (unsigned)-1)
- size = 0;
- /* XXX no disc? maybe we need to reopen... */
- if (size <= 0 && !reopened && cdrom_reopen(bs) >= 0) {
- reopened = 1;
- goto again;
- }
- }
-#endif
- } else {
- size = lseek(fd, 0, SEEK_END);
- if (size < 0) {
- return -errno;
- }
- }
- return size;
-}
-#else
-static int64_t raw_getlength(BlockDriverState *bs)
-{
- BDRVRawState *s = bs->opaque;
- int ret;
- int64_t size;
-
- ret = fd_open(bs);
- if (ret < 0) {
- return ret;
- }
-
- size = lseek(s->fd, 0, SEEK_END);
- if (size < 0) {
- return -errno;
- }
- return size;
-}
-#endif
-
-static int64_t raw_get_allocated_file_size(BlockDriverState *bs)
-{
- struct stat st;
- BDRVRawState *s = bs->opaque;
-
- if (fstat(s->fd, &st) < 0) {
- return -errno;
- }
- return (int64_t)st.st_blocks * 512;
-}
-
-static int raw_create(const char *filename, QemuOpts *opts, Error **errp)
-{
- int fd;
- int result = 0;
- int64_t total_size = 0;
- bool nocow = false;
- PreallocMode prealloc;
- char *buf = NULL;
- Error *local_err = NULL;
-
- strstart(filename, "file:", &filename);
-
- /* Read out options */
- total_size = ROUND_UP(qemu_opt_get_size_del(opts, BLOCK_OPT_SIZE, 0),
- BDRV_SECTOR_SIZE);
- nocow = qemu_opt_get_bool(opts, BLOCK_OPT_NOCOW, false);
- buf = qemu_opt_get_del(opts, BLOCK_OPT_PREALLOC);
- prealloc = qapi_enum_parse(PreallocMode_lookup, buf,
- PREALLOC_MODE__MAX, PREALLOC_MODE_OFF,
- &local_err);
- g_free(buf);
- if (local_err) {
- error_propagate(errp, local_err);
- result = -EINVAL;
- goto out;
- }
-
- fd = qemu_open(filename, O_RDWR | O_CREAT | O_TRUNC | O_BINARY,
- 0644);
- if (fd < 0) {
- result = -errno;
- error_setg_errno(errp, -result, "Could not create file");
- goto out;
- }
-
- if (nocow) {
-#ifdef __linux__
- /* Set NOCOW flag to solve performance issue on fs like btrfs.
- * This is an optimisation. The FS_IOC_SETFLAGS ioctl return value
- * will be ignored since any failure of this operation should not
- * block the left work.
- */
- int attr;
- if (ioctl(fd, FS_IOC_GETFLAGS, &attr) == 0) {
- attr |= FS_NOCOW_FL;
- ioctl(fd, FS_IOC_SETFLAGS, &attr);
- }
-#endif
- }
-
- if (ftruncate(fd, total_size) != 0) {
- result = -errno;
- error_setg_errno(errp, -result, "Could not resize file");
- goto out_close;
- }
-
- switch (prealloc) {
-#ifdef CONFIG_POSIX_FALLOCATE
- case PREALLOC_MODE_FALLOC:
- /* posix_fallocate() doesn't set errno. */
- result = -posix_fallocate(fd, 0, total_size);
- if (result != 0) {
- error_setg_errno(errp, -result,
- "Could not preallocate data for the new file");
- }
- break;
-#endif
- case PREALLOC_MODE_FULL:
- {
- int64_t num = 0, left = total_size;
- buf = g_malloc0(65536);
-
- while (left > 0) {
- num = MIN(left, 65536);
- result = write(fd, buf, num);
- if (result < 0) {
- result = -errno;
- error_setg_errno(errp, -result,
- "Could not write to the new file");
- break;
- }
- left -= result;
- }
- if (result >= 0) {
- result = fsync(fd);
- if (result < 0) {
- result = -errno;
- error_setg_errno(errp, -result,
- "Could not flush new file to disk");
- }
- }
- g_free(buf);
- break;
- }
- case PREALLOC_MODE_OFF:
- break;
- default:
- result = -EINVAL;
- error_setg(errp, "Unsupported preallocation mode: %s",
- PreallocMode_lookup[prealloc]);
- break;
- }
-
-out_close:
- if (qemu_close(fd) != 0 && result == 0) {
- result = -errno;
- error_setg_errno(errp, -result, "Could not close the new file");
- }
-out:
- return result;
-}
-
-/*
- * Find allocation range in @bs around offset @start.
- * May change underlying file descriptor's file offset.
- * If @start is not in a hole, store @start in @data, and the
- * beginning of the next hole in @hole, and return 0.
- * If @start is in a non-trailing hole, store @start in @hole and the
- * beginning of the next non-hole in @data, and return 0.
- * If @start is in a trailing hole or beyond EOF, return -ENXIO.
- * If we can't find out, return a negative errno other than -ENXIO.
- */
-static int find_allocation(BlockDriverState *bs, off_t start,
- off_t *data, off_t *hole)
-{
-#if defined SEEK_HOLE && defined SEEK_DATA
- BDRVRawState *s = bs->opaque;
- off_t offs;
-
- /*
- * SEEK_DATA cases:
- * D1. offs == start: start is in data
- * D2. offs > start: start is in a hole, next data at offs
- * D3. offs < 0, errno = ENXIO: either start is in a trailing hole
- * or start is beyond EOF
- * If the latter happens, the file has been truncated behind
- * our back since we opened it. All bets are off then.
- * Treating like a trailing hole is simplest.
- * D4. offs < 0, errno != ENXIO: we learned nothing
- */
- offs = lseek(s->fd, start, SEEK_DATA);
- if (offs < 0) {
- return -errno; /* D3 or D4 */
- }
- assert(offs >= start);
-
- if (offs > start) {
- /* D2: in hole, next data at offs */
- *hole = start;
- *data = offs;
- return 0;
- }
-
- /* D1: in data, end not yet known */
-
- /*
- * SEEK_HOLE cases:
- * H1. offs == start: start is in a hole
- * If this happens here, a hole has been dug behind our back
- * since the previous lseek().
- * H2. offs > start: either start is in data, next hole at offs,
- * or start is in trailing hole, EOF at offs
- * Linux treats trailing holes like any other hole: offs ==
- * start. Solaris seeks to EOF instead: offs > start (blech).
- * If that happens here, a hole has been dug behind our back
- * since the previous lseek().
- * H3. offs < 0, errno = ENXIO: start is beyond EOF
- * If this happens, the file has been truncated behind our
- * back since we opened it. Treat it like a trailing hole.
- * H4. offs < 0, errno != ENXIO: we learned nothing
- * Pretend we know nothing at all, i.e. "forget" about D1.
- */
- offs = lseek(s->fd, start, SEEK_HOLE);
- if (offs < 0) {
- return -errno; /* D1 and (H3 or H4) */
- }
- assert(offs >= start);
-
- if (offs > start) {
- /*
- * D1 and H2: either in data, next hole at offs, or it was in
- * data but is now in a trailing hole. In the latter case,
- * all bets are off. Treating it as if it there was data all
- * the way to EOF is safe, so simply do that.
- */
- *data = start;
- *hole = offs;
- return 0;
- }
-
- /* D1 and H1 */
- return -EBUSY;
-#else
- return -ENOTSUP;
-#endif
-}
-
-/*
- * Returns the allocation status of the specified sectors.
- *
- * If 'sector_num' is beyond the end of the disk image the return value is 0
- * and 'pnum' is set to 0.
- *
- * 'pnum' is set to the number of sectors (including and immediately following
- * the specified sector) that are known to be in the same
- * allocated/unallocated state.
- *
- * 'nb_sectors' is the max value 'pnum' should be set to. If nb_sectors goes
- * beyond the end of the disk image it will be clamped.
- */
-static int64_t coroutine_fn raw_co_get_block_status(BlockDriverState *bs,
- int64_t sector_num,
- int nb_sectors, int *pnum,
- BlockDriverState **file)
-{
- off_t start, data = 0, hole = 0;
- int64_t total_size;
- int ret;
-
- ret = fd_open(bs);
- if (ret < 0) {
- return ret;
- }
-
- start = sector_num * BDRV_SECTOR_SIZE;
- total_size = bdrv_getlength(bs);
- if (total_size < 0) {
- return total_size;
- } else if (start >= total_size) {
- *pnum = 0;
- return 0;
- } else if (start + nb_sectors * BDRV_SECTOR_SIZE > total_size) {
- nb_sectors = DIV_ROUND_UP(total_size - start, BDRV_SECTOR_SIZE);
- }
-
- ret = find_allocation(bs, start, &data, &hole);
- if (ret == -ENXIO) {
- /* Trailing hole */
- *pnum = nb_sectors;
- ret = BDRV_BLOCK_ZERO;
- } else if (ret < 0) {
- /* No info available, so pretend there are no holes */
- *pnum = nb_sectors;
- ret = BDRV_BLOCK_DATA;
- } else if (data == start) {
- /* On a data extent, compute sectors to the end of the extent,
- * possibly including a partial sector at EOF. */
- *pnum = MIN(nb_sectors, DIV_ROUND_UP(hole - start, BDRV_SECTOR_SIZE));
- ret = BDRV_BLOCK_DATA;
- } else {
- /* On a hole, compute sectors to the beginning of the next extent. */
- assert(hole == start);
- *pnum = MIN(nb_sectors, (data - start) / BDRV_SECTOR_SIZE);
- ret = BDRV_BLOCK_ZERO;
- }
- *file = bs;
- return ret | BDRV_BLOCK_OFFSET_VALID | start;
-}
-
-static coroutine_fn BlockAIOCB *raw_aio_pdiscard(BlockDriverState *bs,
- int64_t offset, int count,
- BlockCompletionFunc *cb, void *opaque)
-{
- BDRVRawState *s = bs->opaque;
-
- return paio_submit(bs, s->fd, offset, NULL, count,
- cb, opaque, QEMU_AIO_DISCARD);
-}
-
-static int coroutine_fn raw_co_pwrite_zeroes(
- BlockDriverState *bs, int64_t offset,
- int count, BdrvRequestFlags flags)
-{
- BDRVRawState *s = bs->opaque;
-
- if (!(flags & BDRV_REQ_MAY_UNMAP)) {
- return paio_submit_co(bs, s->fd, offset, NULL, count,
- QEMU_AIO_WRITE_ZEROES);
- } else if (s->discard_zeroes) {
- return paio_submit_co(bs, s->fd, offset, NULL, count,
- QEMU_AIO_DISCARD);
- }
- return -ENOTSUP;
-}
-
-static int raw_get_info(BlockDriverState *bs, BlockDriverInfo *bdi)
-{
- BDRVRawState *s = bs->opaque;
-
- bdi->unallocated_blocks_are_zero = s->discard_zeroes;
- bdi->can_write_zeroes_with_unmap = s->discard_zeroes;
- 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"
- },
- {
- .name = BLOCK_OPT_NOCOW,
- .type = QEMU_OPT_BOOL,
- .help = "Turn off copy-on-write (valid only on btrfs)"
- },
- {
- .name = BLOCK_OPT_PREALLOC,
- .type = QEMU_OPT_STRING,
- .help = "Preallocation mode (allowed values: off, falloc, full)"
- },
- { /* end of list */ }
- }
-};
-
-BlockDriver bdrv_file = {
- .format_name = "file",
- .protocol_name = "file",
- .instance_size = sizeof(BDRVRawState),
- .bdrv_needs_filename = true,
- .bdrv_probe = NULL, /* no probe for protocols */
- .bdrv_parse_filename = raw_parse_filename,
- .bdrv_file_open = raw_open,
- .bdrv_reopen_prepare = raw_reopen_prepare,
- .bdrv_reopen_commit = raw_reopen_commit,
- .bdrv_reopen_abort = raw_reopen_abort,
- .bdrv_close = raw_close,
- .bdrv_create = raw_create,
- .bdrv_has_zero_init = bdrv_has_zero_init_1,
- .bdrv_co_get_block_status = raw_co_get_block_status,
- .bdrv_co_pwrite_zeroes = raw_co_pwrite_zeroes,
-
- .bdrv_co_preadv = raw_co_preadv,
- .bdrv_co_pwritev = raw_co_pwritev,
- .bdrv_aio_flush = raw_aio_flush,
- .bdrv_aio_pdiscard = raw_aio_pdiscard,
- .bdrv_refresh_limits = raw_refresh_limits,
- .bdrv_io_plug = raw_aio_plug,
- .bdrv_io_unplug = raw_aio_unplug,
-
- .bdrv_truncate = raw_truncate,
- .bdrv_getlength = raw_getlength,
- .bdrv_get_info = raw_get_info,
- .bdrv_get_allocated_file_size
- = raw_get_allocated_file_size,
-
- .create_opts = &raw_create_opts,
-};
-
-/***********************************************/
-/* host device */
-
-#if defined(__APPLE__) && defined(__MACH__)
-static kern_return_t GetBSDPath(io_iterator_t mediaIterator, char *bsdPath,
- CFIndex maxPathSize, int flags);
-static char *FindEjectableOpticalMedia(io_iterator_t *mediaIterator)
-{
- kern_return_t kernResult = KERN_FAILURE;
- mach_port_t masterPort;
- CFMutableDictionaryRef classesToMatch;
- const char *matching_array[] = {kIODVDMediaClass, kIOCDMediaClass};
- char *mediaType = NULL;
-
- kernResult = IOMasterPort( MACH_PORT_NULL, &masterPort );
- if ( KERN_SUCCESS != kernResult ) {
- printf( "IOMasterPort returned %d\n", kernResult );
- }
-
- int index;
- for (index = 0; index < ARRAY_SIZE(matching_array); index++) {
- classesToMatch = IOServiceMatching(matching_array[index]);
- if (classesToMatch == NULL) {
- error_report("IOServiceMatching returned NULL for %s",
- matching_array[index]);
- continue;
- }
- CFDictionarySetValue(classesToMatch, CFSTR(kIOMediaEjectableKey),
- kCFBooleanTrue);
- kernResult = IOServiceGetMatchingServices(masterPort, classesToMatch,
- mediaIterator);
- if (kernResult != KERN_SUCCESS) {
- error_report("Note: IOServiceGetMatchingServices returned %d",
- kernResult);
- continue;
- }
-
- /* If a match was found, leave the loop */
- if (*mediaIterator != 0) {
- DPRINTF("Matching using %s\n", matching_array[index]);
- mediaType = g_strdup(matching_array[index]);
- break;
- }
- }
- return mediaType;
-}
-
-kern_return_t GetBSDPath(io_iterator_t mediaIterator, char *bsdPath,
- CFIndex maxPathSize, int flags)
-{
- io_object_t nextMedia;
- kern_return_t kernResult = KERN_FAILURE;
- *bsdPath = '\0';
- nextMedia = IOIteratorNext( mediaIterator );
- if ( nextMedia )
- {
- CFTypeRef bsdPathAsCFString;
- bsdPathAsCFString = IORegistryEntryCreateCFProperty( nextMedia, CFSTR( kIOBSDNameKey ), kCFAllocatorDefault, 0 );
- if ( bsdPathAsCFString ) {
- size_t devPathLength;
- strcpy( bsdPath, _PATH_DEV );
- if (flags & BDRV_O_NOCACHE) {
- strcat(bsdPath, "r");
- }
- devPathLength = strlen( bsdPath );
- if ( CFStringGetCString( bsdPathAsCFString, bsdPath + devPathLength, maxPathSize - devPathLength, kCFStringEncodingASCII ) ) {
- kernResult = KERN_SUCCESS;
- }
- CFRelease( bsdPathAsCFString );
- }
- IOObjectRelease( nextMedia );
- }
-
- return kernResult;
-}
-
-/* Sets up a real cdrom for use in QEMU */
-static bool setup_cdrom(char *bsd_path, Error **errp)
-{
- int index, num_of_test_partitions = 2, fd;
- char test_partition[MAXPATHLEN];
- bool partition_found = false;
-
- /* look for a working partition */
- for (index = 0; index < num_of_test_partitions; index++) {
- snprintf(test_partition, sizeof(test_partition), "%ss%d", bsd_path,
- index);
- fd = qemu_open(test_partition, O_RDONLY | O_BINARY | O_LARGEFILE);
- if (fd >= 0) {
- partition_found = true;
- qemu_close(fd);
- break;
- }
- }
-
- /* if a working partition on the device was not found */
- if (partition_found == false) {
- error_setg(errp, "Failed to find a working partition on disc");
- } else {
- DPRINTF("Using %s as optical disc\n", test_partition);
- pstrcpy(bsd_path, MAXPATHLEN, test_partition);
- }
- return partition_found;
-}
-
-/* Prints directions on mounting and unmounting a device */
-static void print_unmounting_directions(const char *file_name)
-{
- error_report("If device %s is mounted on the desktop, unmount"
- " it first before using it in QEMU", file_name);
- error_report("Command to unmount device: diskutil unmountDisk %s",
- file_name);
- error_report("Command to mount device: diskutil mountDisk %s", file_name);
-}
-
-#endif /* defined(__APPLE__) && defined(__MACH__) */
-
-static int hdev_probe_device(const char *filename)
-{
- struct stat st;
-
- /* allow a dedicated CD-ROM driver to match with a higher priority */
- if (strstart(filename, "/dev/cdrom", NULL))
- return 50;
-
- if (stat(filename, &st) >= 0 &&
- (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode))) {
- return 100;
- }
-
- return 0;
-}
-
-static int check_hdev_writable(BDRVRawState *s)
-{
-#if defined(BLKROGET)
- /* Linux block devices can be configured "read-only" using blockdev(8).
- * This is independent of device node permissions and therefore open(2)
- * with O_RDWR succeeds. Actual writes fail with EPERM.
- *
- * bdrv_open() is supposed to fail if the disk is read-only. Explicitly
- * check for read-only block devices so that Linux block devices behave
- * properly.
- */
- struct stat st;
- int readonly = 0;
-
- if (fstat(s->fd, &st)) {
- return -errno;
- }
-
- if (!S_ISBLK(st.st_mode)) {
- return 0;
- }
-
- if (ioctl(s->fd, BLKROGET, &readonly) < 0) {
- return -errno;
- }
-
- if (readonly) {
- return -EACCES;
- }
-#endif /* defined(BLKROGET) */
- 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 bool hdev_is_sg(BlockDriverState *bs)
-{
-
-#if defined(__linux__)
-
- BDRVRawState *s = bs->opaque;
- struct stat st;
- struct sg_scsi_id scsiid;
- int sg_version;
- int ret;
-
- if (stat(bs->filename, &st) < 0 || !S_ISCHR(st.st_mode)) {
- return false;
- }
-
- ret = ioctl(s->fd, SG_GET_VERSION_NUM, &sg_version);
- if (ret < 0) {
- return false;
- }
-
- ret = ioctl(s->fd, SG_GET_SCSI_ID, &scsiid);
- if (ret >= 0) {
- DPRINTF("SG device found: type=%d, version=%d\n",
- scsiid.scsi_type, sg_version);
- return true;
- }
-
-#endif
-
- return false;
-}
-
-static int hdev_open(BlockDriverState *bs, QDict *options, int flags,
- Error **errp)
-{
- BDRVRawState *s = bs->opaque;
- Error *local_err = NULL;
- int ret;
-
-#if defined(__APPLE__) && defined(__MACH__)
- const char *filename = qdict_get_str(options, "filename");
- char bsd_path[MAXPATHLEN] = "";
- bool error_occurred = false;
-
- /* If using a real cdrom */
- if (strcmp(filename, "/dev/cdrom") == 0) {
- char *mediaType = NULL;
- kern_return_t ret_val;
- io_iterator_t mediaIterator = 0;
-
- mediaType = FindEjectableOpticalMedia(&mediaIterator);
- if (mediaType == NULL) {
- error_setg(errp, "Please make sure your CD/DVD is in the optical"
- " drive");
- error_occurred = true;
- goto hdev_open_Mac_error;
- }
-
- ret_val = GetBSDPath(mediaIterator, bsd_path, sizeof(bsd_path), flags);
- if (ret_val != KERN_SUCCESS) {
- error_setg(errp, "Could not get BSD path for optical drive");
- error_occurred = true;
- goto hdev_open_Mac_error;
- }
-
- /* If a real optical drive was not found */
- if (bsd_path[0] == '\0') {
- error_setg(errp, "Failed to obtain bsd path for optical drive");
- error_occurred = true;
- goto hdev_open_Mac_error;
- }
-
- /* If using a cdrom disc and finding a partition on the disc failed */
- if (strncmp(mediaType, kIOCDMediaClass, 9) == 0 &&
- setup_cdrom(bsd_path, errp) == false) {
- print_unmounting_directions(bsd_path);
- error_occurred = true;
- goto hdev_open_Mac_error;
- }
-
- qdict_put(options, "filename", qstring_from_str(bsd_path));
-
-hdev_open_Mac_error:
- g_free(mediaType);
- if (mediaIterator) {
- IOObjectRelease(mediaIterator);
- }
- if (error_occurred) {
- return -ENOENT;
- }
- }
-#endif /* defined(__APPLE__) && defined(__MACH__) */
-
- s->type = FTYPE_FILE;
-
- ret = raw_open_common(bs, options, flags, 0, &local_err);
- if (ret < 0) {
- error_propagate(errp, local_err);
-#if defined(__APPLE__) && defined(__MACH__)
- if (*bsd_path) {
- filename = bsd_path;
- }
- /* if a physical device experienced an error while being opened */
- if (strncmp(filename, "/dev/", 5) == 0) {
- print_unmounting_directions(filename);
- }
-#endif /* defined(__APPLE__) && defined(__MACH__) */
- return ret;
- }
-
- /* Since this does ioctl the device must be already opened */
- bs->sg = hdev_is_sg(bs);
-
- if (flags & BDRV_O_RDWR) {
- ret = check_hdev_writable(s);
- if (ret < 0) {
- raw_close(bs);
- error_setg_errno(errp, -ret, "The device is not writable");
- return ret;
- }
- }
-
- return ret;
-}
-
-#if defined(__linux__)
-
-static BlockAIOCB *hdev_aio_ioctl(BlockDriverState *bs,
- unsigned long int req, void *buf,
- BlockCompletionFunc *cb, void *opaque)
-{
- BDRVRawState *s = bs->opaque;
- RawPosixAIOData *acb;
- ThreadPool *pool;
-
- if (fd_open(bs) < 0)
- return NULL;
-
- acb = g_new(RawPosixAIOData, 1);
- acb->bs = bs;
- acb->aio_type = QEMU_AIO_IOCTL;
- acb->aio_fildes = s->fd;
- acb->aio_offset = 0;
- acb->aio_ioctl_buf = buf;
- acb->aio_ioctl_cmd = req;
- pool = aio_get_thread_pool(bdrv_get_aio_context(bs));
- return thread_pool_submit_aio(pool, aio_worker, acb, cb, opaque);
-}
-#endif /* linux */
-
-static int fd_open(BlockDriverState *bs)
-{
- BDRVRawState *s = bs->opaque;
-
- /* this is just to ensure s->fd is sane (its called by io ops) */
- if (s->fd >= 0)
- return 0;
- return -EIO;
-}
-
-static coroutine_fn BlockAIOCB *hdev_aio_pdiscard(BlockDriverState *bs,
- int64_t offset, int count,
- BlockCompletionFunc *cb, void *opaque)
-{
- BDRVRawState *s = bs->opaque;
-
- if (fd_open(bs) < 0) {
- return NULL;
- }
- return paio_submit(bs, s->fd, offset, NULL, count,
- cb, opaque, QEMU_AIO_DISCARD|QEMU_AIO_BLKDEV);
-}
-
-static coroutine_fn int hdev_co_pwrite_zeroes(BlockDriverState *bs,
- int64_t offset, int count, BdrvRequestFlags flags)
-{
- BDRVRawState *s = bs->opaque;
- int rc;
-
- rc = fd_open(bs);
- if (rc < 0) {
- return rc;
- }
- if (!(flags & BDRV_REQ_MAY_UNMAP)) {
- return paio_submit_co(bs, s->fd, offset, NULL, count,
- QEMU_AIO_WRITE_ZEROES|QEMU_AIO_BLKDEV);
- } else if (s->discard_zeroes) {
- return paio_submit_co(bs, s->fd, offset, NULL, count,
- QEMU_AIO_DISCARD|QEMU_AIO_BLKDEV);
- }
- return -ENOTSUP;
-}
-
-static int hdev_create(const char *filename, QemuOpts *opts,
- Error **errp)
-{
- int fd;
- int ret = 0;
- struct stat stat_buf;
- int64_t total_size = 0;
- bool has_prefix;
-
- /* This function is used by both protocol block drivers and therefore either
- * of these prefixes may be given.
- * The return value has to be stored somewhere, otherwise this is an error
- * due to -Werror=unused-value. */
- has_prefix =
- strstart(filename, "host_device:", &filename) ||
- strstart(filename, "host_cdrom:" , &filename);
-
- (void)has_prefix;
-
- ret = raw_normalize_devicepath(&filename);
- if (ret < 0) {
- error_setg_errno(errp, -ret, "Could not normalize device path");
- return ret;
- }
-
- /* 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_BINARY);
- if (fd < 0) {
- ret = -errno;
- error_setg_errno(errp, -ret, "Could not open device");
- return ret;
- }
-
- if (fstat(fd, &stat_buf) < 0) {
- ret = -errno;
- error_setg_errno(errp, -ret, "Could not stat device");
- } else if (!S_ISBLK(stat_buf.st_mode) && !S_ISCHR(stat_buf.st_mode)) {
- error_setg(errp,
- "The given file is neither a block nor a character device");
- ret = -ENODEV;
- } else if (lseek(fd, 0, SEEK_END) < total_size) {
- error_setg(errp, "Device is too small");
- ret = -ENOSPC;
- }
-
- qemu_close(fd);
- return ret;
-}
-
-static BlockDriver bdrv_host_device = {
- .format_name = "host_device",
- .protocol_name = "host_device",
- .instance_size = sizeof(BDRVRawState),
- .bdrv_needs_filename = true,
- .bdrv_probe_device = hdev_probe_device,
- .bdrv_parse_filename = hdev_parse_filename,
- .bdrv_file_open = hdev_open,
- .bdrv_close = raw_close,
- .bdrv_reopen_prepare = raw_reopen_prepare,
- .bdrv_reopen_commit = raw_reopen_commit,
- .bdrv_reopen_abort = raw_reopen_abort,
- .bdrv_create = hdev_create,
- .create_opts = &raw_create_opts,
- .bdrv_co_pwrite_zeroes = hdev_co_pwrite_zeroes,
-
- .bdrv_co_preadv = raw_co_preadv,
- .bdrv_co_pwritev = raw_co_pwritev,
- .bdrv_aio_flush = raw_aio_flush,
- .bdrv_aio_pdiscard = hdev_aio_pdiscard,
- .bdrv_refresh_limits = raw_refresh_limits,
- .bdrv_io_plug = raw_aio_plug,
- .bdrv_io_unplug = raw_aio_unplug,
-
- .bdrv_truncate = raw_truncate,
- .bdrv_getlength = raw_getlength,
- .bdrv_get_info = raw_get_info,
- .bdrv_get_allocated_file_size
- = raw_get_allocated_file_size,
- .bdrv_probe_blocksizes = hdev_probe_blocksizes,
- .bdrv_probe_geometry = hdev_probe_geometry,
-
- /* generic scsi device */
-#ifdef __linux__
- .bdrv_aio_ioctl = hdev_aio_ioctl,
-#endif
-};
-
-#if defined(__linux__) || defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
-static void cdrom_parse_filename(const char *filename, QDict *options,
- Error **errp)
-{
- /* The prefix is optional, just as for "file". */
- strstart(filename, "host_cdrom:", &filename);
-
- qdict_put_obj(options, "filename", QOBJECT(qstring_from_str(filename)));
-}
-#endif
-
-#ifdef __linux__
-static int cdrom_open(BlockDriverState *bs, QDict *options, int flags,
- Error **errp)
-{
- BDRVRawState *s = bs->opaque;
-
- s->type = FTYPE_CD;
-
- /* open will not fail even if no CD is inserted, so add O_NONBLOCK */
- return raw_open_common(bs, options, flags, O_NONBLOCK, errp);
-}
-
-static int cdrom_probe_device(const char *filename)
-{
- int fd, ret;
- int prio = 0;
- struct stat st;
-
- fd = qemu_open(filename, O_RDONLY | O_NONBLOCK);
- if (fd < 0) {
- goto out;
- }
- ret = fstat(fd, &st);
- if (ret == -1 || !S_ISBLK(st.st_mode)) {
- goto outc;
- }
-
- /* Attempt to detect via a CDROM specific ioctl */
- ret = ioctl(fd, CDROM_DRIVE_STATUS, CDSL_CURRENT);
- if (ret >= 0)
- prio = 100;
-
-outc:
- qemu_close(fd);
-out:
- return prio;
-}
-
-static bool cdrom_is_inserted(BlockDriverState *bs)
-{
- BDRVRawState *s = bs->opaque;
- int ret;
-
- ret = ioctl(s->fd, CDROM_DRIVE_STATUS, CDSL_CURRENT);
- return ret == CDS_DISC_OK;
-}
-
-static void cdrom_eject(BlockDriverState *bs, bool eject_flag)
-{
- BDRVRawState *s = bs->opaque;
-
- if (eject_flag) {
- if (ioctl(s->fd, CDROMEJECT, NULL) < 0)
- perror("CDROMEJECT");
- } else {
- if (ioctl(s->fd, CDROMCLOSETRAY, NULL) < 0)
- perror("CDROMEJECT");
- }
-}
-
-static void cdrom_lock_medium(BlockDriverState *bs, bool locked)
-{
- BDRVRawState *s = bs->opaque;
-
- if (ioctl(s->fd, CDROM_LOCKDOOR, locked) < 0) {
- /*
- * Note: an error can happen if the distribution automatically
- * mounts the CD-ROM
- */
- /* perror("CDROM_LOCKDOOR"); */
- }
-}
-
-static BlockDriver bdrv_host_cdrom = {
- .format_name = "host_cdrom",
- .protocol_name = "host_cdrom",
- .instance_size = sizeof(BDRVRawState),
- .bdrv_needs_filename = true,
- .bdrv_probe_device = cdrom_probe_device,
- .bdrv_parse_filename = cdrom_parse_filename,
- .bdrv_file_open = cdrom_open,
- .bdrv_close = raw_close,
- .bdrv_reopen_prepare = raw_reopen_prepare,
- .bdrv_reopen_commit = raw_reopen_commit,
- .bdrv_reopen_abort = raw_reopen_abort,
- .bdrv_create = hdev_create,
- .create_opts = &raw_create_opts,
-
-
- .bdrv_co_preadv = raw_co_preadv,
- .bdrv_co_pwritev = raw_co_pwritev,
- .bdrv_aio_flush = raw_aio_flush,
- .bdrv_refresh_limits = raw_refresh_limits,
- .bdrv_io_plug = raw_aio_plug,
- .bdrv_io_unplug = raw_aio_unplug,
-
- .bdrv_truncate = raw_truncate,
- .bdrv_getlength = raw_getlength,
- .has_variable_length = true,
- .bdrv_get_allocated_file_size
- = raw_get_allocated_file_size,
-
- /* removable device support */
- .bdrv_is_inserted = cdrom_is_inserted,
- .bdrv_eject = cdrom_eject,
- .bdrv_lock_medium = cdrom_lock_medium,
-
- /* generic scsi device */
- .bdrv_aio_ioctl = hdev_aio_ioctl,
-};
-#endif /* __linux__ */
-
-#if defined (__FreeBSD__) || defined(__FreeBSD_kernel__)
-static int cdrom_open(BlockDriverState *bs, QDict *options, int flags,
- Error **errp)
-{
- BDRVRawState *s = bs->opaque;
- Error *local_err = NULL;
- int ret;
-
- s->type = FTYPE_CD;
-
- ret = raw_open_common(bs, options, flags, 0, &local_err);
- if (ret) {
- error_propagate(errp, local_err);
- return ret;
- }
-
- /* make sure the door isn't locked at this time */
- ioctl(s->fd, CDIOCALLOW);
- return 0;
-}
-
-static int cdrom_probe_device(const char *filename)
-{
- if (strstart(filename, "/dev/cd", NULL) ||
- strstart(filename, "/dev/acd", NULL))
- return 100;
- return 0;
-}
-
-static int cdrom_reopen(BlockDriverState *bs)
-{
- BDRVRawState *s = bs->opaque;
- int fd;
-
- /*
- * Force reread of possibly changed/newly loaded disc,
- * FreeBSD seems to not notice sometimes...
- */
- if (s->fd >= 0)
- qemu_close(s->fd);
- fd = qemu_open(bs->filename, s->open_flags, 0644);
- if (fd < 0) {
- s->fd = -1;
- return -EIO;
- }
- s->fd = fd;
-
- /* make sure the door isn't locked at this time */
- ioctl(s->fd, CDIOCALLOW);
- return 0;
-}
-
-static bool cdrom_is_inserted(BlockDriverState *bs)
-{
- return raw_getlength(bs) > 0;
-}
-
-static void cdrom_eject(BlockDriverState *bs, bool eject_flag)
-{
- BDRVRawState *s = bs->opaque;
-
- if (s->fd < 0)
- return;
-
- (void) ioctl(s->fd, CDIOCALLOW);
-
- if (eject_flag) {
- if (ioctl(s->fd, CDIOCEJECT) < 0)
- perror("CDIOCEJECT");
- } else {
- if (ioctl(s->fd, CDIOCCLOSE) < 0)
- perror("CDIOCCLOSE");
- }
-
- cdrom_reopen(bs);
-}
-
-static void cdrom_lock_medium(BlockDriverState *bs, bool locked)
-{
- BDRVRawState *s = bs->opaque;
-
- if (s->fd < 0)
- return;
- if (ioctl(s->fd, (locked ? CDIOCPREVENT : CDIOCALLOW)) < 0) {
- /*
- * Note: an error can happen if the distribution automatically
- * mounts the CD-ROM
- */
- /* perror("CDROM_LOCKDOOR"); */
- }
-}
-
-static BlockDriver bdrv_host_cdrom = {
- .format_name = "host_cdrom",
- .protocol_name = "host_cdrom",
- .instance_size = sizeof(BDRVRawState),
- .bdrv_needs_filename = true,
- .bdrv_probe_device = cdrom_probe_device,
- .bdrv_parse_filename = cdrom_parse_filename,
- .bdrv_file_open = cdrom_open,
- .bdrv_close = raw_close,
- .bdrv_reopen_prepare = raw_reopen_prepare,
- .bdrv_reopen_commit = raw_reopen_commit,
- .bdrv_reopen_abort = raw_reopen_abort,
- .bdrv_create = hdev_create,
- .create_opts = &raw_create_opts,
-
- .bdrv_co_preadv = raw_co_preadv,
- .bdrv_co_pwritev = raw_co_pwritev,
- .bdrv_aio_flush = raw_aio_flush,
- .bdrv_refresh_limits = raw_refresh_limits,
- .bdrv_io_plug = raw_aio_plug,
- .bdrv_io_unplug = raw_aio_unplug,
-
- .bdrv_truncate = raw_truncate,
- .bdrv_getlength = raw_getlength,
- .has_variable_length = true,
- .bdrv_get_allocated_file_size
- = raw_get_allocated_file_size,
-
- /* removable device support */
- .bdrv_is_inserted = cdrom_is_inserted,
- .bdrv_eject = cdrom_eject,
- .bdrv_lock_medium = cdrom_lock_medium,
-};
-#endif /* __FreeBSD__ */
-
-static void bdrv_file_init(void)
-{
- /*
- * Register all the drivers. Note that order is important, the driver
- * registered last will get probed first.
- */
- bdrv_register(&bdrv_file);
- bdrv_register(&bdrv_host_device);
-#ifdef __linux__
- bdrv_register(&bdrv_host_cdrom);
-#endif
-#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
- bdrv_register(&bdrv_host_cdrom);
-#endif
-}
-
-block_init(bdrv_file_init);
+++ /dev/null
-/*
- * 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 "block/raw-aio.h"
-#include "trace.h"
-#include "block/thread-pool.h"
-#include "qemu/iov.h"
-#include "qapi/qmp/qstring.h"
-#include "qapi/util.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 offset, QEMUIOVector *qiov, int count,
- 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;
- assert(qiov->size == count);
- }
- acb->aio_nbytes = count;
- acb->aio_offset = offset;
-
- trace_paio_submit(acb, opaque, offset, count, 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, Error **errp)
-{
- BDRVRawState *s = bs->opaque;
- DWORD sectorsPerCluster, freeClusters, totalClusters, count;
- DISK_GEOMETRY_EX dg;
- BOOL status;
-
- if (s->type == FTYPE_CD) {
- bs->bl.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->bl.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->bl.request_alignment = dg.Geometry.BytesPerSector;
- }
-}
-
-static void raw_parse_flags(int flags, bool use_aio, 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 (use_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",
- },
- {
- .name = "aio",
- .type = QEMU_OPT_STRING,
- .help = "host AIO implementation (threads, native)",
- },
- { /* end of list */ }
- },
-};
-
-static bool get_aio_option(QemuOpts *opts, int flags, Error **errp)
-{
- BlockdevAioOptions aio, aio_default;
-
- aio_default = (flags & BDRV_O_NATIVE_AIO) ? BLOCKDEV_AIO_OPTIONS_NATIVE
- : BLOCKDEV_AIO_OPTIONS_THREADS;
- aio = qapi_enum_parse(BlockdevAioOptions_lookup, qemu_opt_get(opts, "aio"),
- BLOCKDEV_AIO_OPTIONS__MAX, aio_default, errp);
-
- switch (aio) {
- case BLOCKDEV_AIO_OPTIONS_NATIVE:
- return true;
- case BLOCKDEV_AIO_OPTIONS_THREADS:
- return false;
- default:
- error_setg(errp, "Invalid AIO option");
- }
- return false;
-}
-
-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;
- bool use_aio;
- 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");
-
- use_aio = get_aio_option(opts, flags, &local_err);
- if (local_err) {
- error_propagate(errp, local_err);
- ret = -EINVAL;
- goto fail;
- }
-
- raw_parse_flags(flags, use_aio, &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();
-
- error_setg_win32(errp, err, "Could not open '%s'", filename);
- if (err == ERROR_ACCESS_DENIED) {
- ret = -EACCES;
- } else {
- ret = -EINVAL;
- }
- goto fail;
- }
-
- if (use_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));
- }
-
- 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 << BDRV_SECTOR_BITS, qiov,
- nb_sectors << BDRV_SECTOR_BITS,
- 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 << BDRV_SECTOR_BITS, qiov,
- nb_sectors << BDRV_SECTOR_BITS,
- 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_refresh_limits = raw_probe_alignment,
- .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;
- bool use_aio;
-
- 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");
-
- use_aio = get_aio_option(opts, flags, &local_err);
- if (!local_err && use_aio) {
- error_setg(&local_err, "AIO is not supported on Windows host devices");
- }
- if (local_err) {
- error_propagate(errp, local_err);
- ret = -EINVAL;
- goto done;
- }
-
- 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, use_aio, &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);
qmp_block_job_complete(void *job) "job %p"
qmp_block_stream(void *bs, void *job) "bs %p job %p"
-# block/raw-win32.c
-# block/raw-posix.c
+# block/file-win32.c
+# block/file-posix.c
paio_submit_co(int64_t offset, int count, int type) "offset %"PRId64" count %d type %d"
paio_submit(void *acb, void *opaque, int64_t offset, int count, int type) "acb %p opaque %p offset %"PRId64" count %d type %d"
fi
##########################################
-# xfsctl() probe, used for raw-posix
+# xfsctl() probe, used for file-posix.c
if test "$xfs" != "no" ; then
cat > $TMPC << EOF
#include <stddef.h> /* NULL */
/*
* Flushes all data that was already written to the OS all the way down to
- * the disk (for example raw-posix calls fsync()).
+ * the disk (for example file-posix.c calls fsync()).
*/
int coroutine_fn (*bdrv_co_flush_to_disk)(BlockDriverState *bs);