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Re: [Qemu-devel] [RFC 10/10] QMP/HMP: change: Use QMP tray commands
From: |
Luiz Capitulino |
Subject: |
Re: [Qemu-devel] [RFC 10/10] QMP/HMP: change: Use QMP tray commands |
Date: |
Mon, 6 Jun 2011 11:45:06 -0300 |
On Mon, 6 Jun 2011 17:18:31 +0530
Amit Shah <address@hidden> wrote:
> On (Fri) 03 Jun 2011 [16:04:02], Luiz Capitulino wrote:
> > This commit rewrites change in terms of blockdev-tray-open,
> > blockdev-media-insert and blockdev-tray-close.
> >
> > There should be no visible changes in HMP or QMP, except that
> > the use of this command causes the BLOCK_TRAY_OPEN *and*
> > BLOCK_TRAY_CLOSE events to emitted.
> >
> > Signed-off-by: Luiz Capitulino <address@hidden>
> > ---
> > blockdev.c | 43 +++++++++----------------------------------
> > 1 files changed, 9 insertions(+), 34 deletions(-)
> >
> > diff --git a/blockdev.c b/blockdev.c
> > index 36c56fd..e9edcb3 100644
> > --- a/blockdev.c
> > +++ b/blockdev.c
> > @@ -648,23 +648,6 @@ out:
> > return ret;
> > }
> >
> > -static int eject_device(Monitor *mon, BlockDriverState *bs, int force)
> > -{
> > - if (!force) {
> > - if (!bdrv_is_removable(bs)) {
> > - qerror_report(QERR_DEVICE_NOT_REMOVABLE,
> > - bdrv_get_device_name(bs));
> > - return -1;
> > - }
> > - if (bdrv_is_locked(bs)) {
> > - qerror_report(QERR_DEVICE_LOCKED, bdrv_get_device_name(bs));
> > - return -1;
> > - }
> > - }
> > - bdrv_close(bs);
> > - return 0;
> > -}
> > -
> > static BlockDriverState *bdrv_removable_find(const char *name)
> > {
> > BlockDriverState *bs;
> > @@ -819,30 +802,22 @@ int do_change_block(Monitor *mon, const char *device,
> > const char *filename, const char *fmt)
> > {
> > BlockDriverState *bs;
> > - BlockDriver *drv = NULL;
> > - int bdrv_flags;
> >
> > - bs = bdrv_find(device);
> > - if (!bs) {
> > - qerror_report(QERR_DEVICE_NOT_FOUND, device);
> > + if (tray_open(device, 1, 0) < 0) { /* XXX: should we force? */
> > return -1;
> > }
> > - if (fmt) {
> > - drv = bdrv_find_whitelisted_format(fmt);
> > - if (!drv) {
> > - qerror_report(QERR_INVALID_BLOCK_FORMAT, fmt);
> > - return -1;
> > - }
> > - }
> > - if (eject_device(mon, bs, 0) < 0) {
> > +
> > + if (media_insert(device, filename, fmt) < 0) {
> > return -1;
> > }
> > - bdrv_flags = bdrv_is_read_only(bs) ? 0 : BDRV_O_RDWR;
> > - bdrv_flags |= bdrv_is_snapshot(bs) ? BDRV_O_SNAPSHOT : 0;
> > - if (bdrv_open(bs, filename, bdrv_flags, drv) < 0) {
> > - qerror_report(QERR_OPEN_FILE_FAILED, filename);
> > +
> > + if (tray_close(device) < 0) {
> > + /* XXX: open the tray and remove the media? */
> > return -1;
> > }
>
> So if the new medium points to a non-existent file, close will fail,
media_insert() will and tray_close() won't be called. That's what you
meant, right?
> and leave the tray in the open state. A next change command will fail
> because the tray is already open. Not a good thing.
tray_open() shouldn't fail if the tray is already open.
[Qemu-devel] [RFC 08/10] QMP: Introduce the BLOCK_TRAY_OPEN and BLOCK_TRAY_CLOSE events, Luiz Capitulino, 2011/06/03
[Qemu-devel] [RFC 09/10] QMP/HMP: eject: Use blockdev-tray-open, Luiz Capitulino, 2011/06/03
[Qemu-devel] [RFC 10/10] QMP/HMP: change: Use QMP tray commands, Luiz Capitulino, 2011/06/03
Re: [Qemu-devel] [RFC 00/10]: QMP/HMP: Introduce tray handling commands, Markus Armbruster, 2011/06/06