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 <lcapitul...@redhat.com> > --- > 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, and leave the tray in the open state. A next change command will fail because the tray is already open. Not a good thing. Amit