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Re: [Qemu-devel] [RFC 10/10] QMP/HMP: change: Use QMP tray commands
From: |
Amit Shah |
Subject: |
Re: [Qemu-devel] [RFC 10/10] QMP/HMP: change: Use QMP tray commands |
Date: |
Mon, 6 Jun 2011 17:18:31 +0530 |
User-agent: |
Mutt/1.5.21 (2010-09-15) |
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,
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
[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 10/10] QMP/HMP: change: Use QMP tray commands,
Amit Shah <=
Re: [Qemu-devel] [RFC 00/10]: QMP/HMP: Introduce tray handling commands, Markus Armbruster, 2011/06/06