static int raw_open_common(BlockDriverState *bs, QDict *options,
int bdrv_flags, int open_flags)
{
BDRVRawState *s = bs->opaque;
QemuOpts *opts;
Error *local_err = NULL;
const char *filename;
int fd, ret;
opts = qemu_opts_create_nofail(&raw_runtime_opts);
qemu_opts_absorb_qdict(opts, options, &local_err);
if (error_is_set(&local_err)) {
qerror_report_err(local_err);
error_free(local_err);
ret = -EINVAL;
goto fail;
}
filename = qemu_opt_get(opts, "filename");
ret = raw_normalize_devicepath(&filename);
if (ret != 0) {
goto fail;
}
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;
if (ret == -EROFS) {
ret = -EACCES;
}
goto fail;
}
s->fd = fd;
#ifdef CONFIG_LINUX_AIO
if (raw_set_aio(&s->aio_ctx, &s->use_aio, bdrv_flags)) {
qemu_close(fd);
ret = -errno;
goto fail;
}
#endif
s->has_discard = 1;
#ifdef CONFIG_XFS
if (platform_test_xfs_fd(s->fd)) {
s->is_xfs = 1;
}
#endif
ret = 0;
fail:
qemu_opts_del(opts);
return ret;
}
static int raw_open_common(BlockDriverState *bs, const char *filename,
int bdrv_flags, int open_flags)
{
BDRVRawState *s = bs->opaque;
int fd, ret;
ret = raw_normalize_devicepath(&filename);
if (ret != 0) {
return ret;
}
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;
if (ret == -EROFS)
ret = -EACCES;
return ret;
}
s->fd = fd;
#ifdef CONFIG_LINUX_AIO
if (raw_set_aio(&s->aio_ctx, &s->use_aio, bdrv_flags)) {
qemu_close(fd);
return -errno;
}
#endif
s->has_discard = 1;
#ifdef CONFIG_XFS
if (platform_test_xfs_fd(s->fd)) {
s->is_xfs = 1;
}
#endif
return 0;
}
static int raw_open_common(BlockDriverState *bs, const char *filename,
int bdrv_flags, int open_flags)
{
BDRVRawState *s = bs->opaque;
int fd, ret;
ret = raw_normalize_devicepath(&filename);
if (ret != 0) {
return ret;
}
s->open_flags = open_flags | O_BINARY;
s->open_flags &= ~O_ACCMODE;
if (bdrv_flags & BDRV_O_RDWR) {
s->open_flags |= O_RDWR;
} else {
s->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))
s->open_flags |= O_DIRECT;
if (!(bdrv_flags & BDRV_O_CACHE_WB))
s->open_flags |= O_DSYNC;
s->fd = -1;
fd = qemu_open(filename, s->open_flags, 0644);
if (fd < 0) {
ret = -errno;
if (ret == -EROFS)
ret = -EACCES;
return ret;
}
s->fd = fd;
s->aligned_buf = NULL;
if ((bdrv_flags & BDRV_O_NOCACHE)) {
/*
* Allocate a buffer for read/modify/write cycles. Chose the size
* pessimistically as we don't know the block size yet.
*/
s->aligned_buf_size = 32 * MAX_BLOCKSIZE;
s->aligned_buf = qemu_memalign(MAX_BLOCKSIZE, s->aligned_buf_size);
if (s->aligned_buf == NULL) {
goto out_close;
}
}
#ifdef CONFIG_LINUX_AIO
if ((bdrv_flags & (BDRV_O_NOCACHE|BDRV_O_NATIVE_AIO)) ==
(BDRV_O_NOCACHE|BDRV_O_NATIVE_AIO)) {
/* We're falling back to POSIX AIO in some cases */
paio_init();
s->aio_ctx = laio_init();
if (!s->aio_ctx) {
goto out_free_buf;
}
s->use_aio = 1;
} else
#endif
{
if (paio_init() < 0) {
goto out_free_buf;
}
#ifdef CONFIG_LINUX_AIO
s->use_aio = 0;
#endif
}
#ifdef CONFIG_XFS
if (platform_test_xfs_fd(s->fd)) {
s->is_xfs = 1;
}
#endif
return 0;
out_free_buf:
qemu_vfree(s->aligned_buf);
out_close:
close(fd);
return -errno;
}
