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file-win32: Support .bdrv_co_create 

This adds the .bdrv_co_create driver callback to file-win32, which
enables image creation over QMP.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
This commit is contained in:
Kevin Wolf 2018-02-05 16:24:32 +01:00
parent 927f11e131
commit 3766ef579c
1 changed files with 41 additions and 12 deletions
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53
block/file-win32.c
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@ -553,10 +553,40 @@ static int64_t raw_get_allocated_file_size(BlockDriverState *bs)
return st.st_size;
}
static int raw_co_create(BlockdevCreateOptions *options, Error **errp)
{
BlockdevCreateOptionsFile *file_opts;
int fd;
assert(options->driver == BLOCKDEV_DRIVER_FILE);
file_opts = &options->u.file;
if (file_opts->has_preallocation) {
error_setg(errp, "Preallocation is not supported on Windows");
return -EINVAL;
}
if (file_opts->has_nocow) {
error_setg(errp, "nocow is not supported on Windows");
return -EINVAL;
}
fd = qemu_open(file_opts->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, file_opts->size);
qemu_close(fd);
return 0;
}
static int coroutine_fn raw_co_create_opts(const char *filename, QemuOpts *opts,
Error **errp)
{
int fd;
BlockdevCreateOptions options;
int64_t total_size = 0;
strstart(filename, "file:", &filename);
@ -565,19 +595,18 @@ static int coroutine_fn raw_co_create_opts(const char *filename, QemuOpts *opts,
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;
options = (BlockdevCreateOptions) {
.driver = BLOCKDEV_DRIVER_FILE,
.u.file = {
.filename = (char *) filename,
.size = total_size,
.has_preallocation = false,
.has_nocow = false,
},
};
return raw_co_create(&options, errp);
}
static QemuOptsList raw_create_opts = {
.name = "raw-create-opts",
.head = QTAILQ_HEAD_INITIALIZER(raw_create_opts.head),