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w32: Fix access to host devices (regression)

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QEMU failed to open host devices like \\.\PhysicalDrive0 (first hard disk)
since some time (commit 8a79380b8ef1b02d2abd705dd026a18863b09020?).

Those devices use hdev_open which did not use the latest API for options.
This resulted in a fatal runtime error:

  Block protocol 'host_device' doesn't support the option 'filename'

Duplicate code from raw_open to fix this.

Cc: qemu-stable@nongnu.org
Reported-by: David Brenner <david.brenner3@gmail.com>
Signed-off-by: Stefan Weil <sw@weilnetz.de>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
Stefan Weil 2013-09-01 22:59:25 +02:00 committed by Stefan Hajnoczi
parent b2e10493c7
commit 68dc036488
1 changed files with 29 additions and 7 deletions
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36
block/raw-win32.c
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@ -535,13 +535,29 @@ static int hdev_open(BlockDriverState *bs, QDict *options, int flags)
{
BDRVRawState *s = bs->opaque;
int access_flags, create_flags;
int ret = 0;
DWORD overlapped;
char device_name[64];
const char *filename = qdict_get_str(options, "filename");
Error *local_err = NULL;
const char *filename;
QemuOpts *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 done;
}
filename = qemu_opt_get(opts, "filename");
if (strstart(filename, "/dev/cdrom", NULL)) {
if (find_cdrom(device_name, sizeof(device_name)) < 0)
return -ENOENT;
if (find_cdrom(device_name, sizeof(device_name)) < 0) {
ret = -ENOENT;
goto done;
}
filename = device_name;
} else {
/* transform drive letters into device name */
@ -564,11 +580,17 @@ static int hdev_open(BlockDriverState *bs, QDict *options, int flags)
if (s->hfile == INVALID_HANDLE_VALUE) {
int err = GetLastError();
if (err == ERROR_ACCESS_DENIED)
return -EACCES;
return -1;
if (err == ERROR_ACCESS_DENIED) {
ret = -EACCES;
} else {
ret = -1;
}
goto done;
}
return 0;
done:
qemu_opts_del(opts);
return ret;
}
static BlockDriver bdrv_host_device = {