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Re: [Qemu-devel] [PATCH v5 19/38] block: Fail requests to empty BlockBac
From: |
Kevin Wolf |
Subject: |
Re: [Qemu-devel] [PATCH v5 19/38] block: Fail requests to empty BlockBackend |
Date: |
Tue, 22 Sep 2015 16:30:12 +0200 |
User-agent: |
Mutt/1.5.21 (2010-09-15) |
Am 18.09.2015 um 17:22 hat Max Reitz geschrieben:
> If there is no BlockDriverState in a BlockBackend or if the tray of the
> guest device is open, fail all requests (where that is possible) with
> -ENOMEDIUM.
>
> The reason the status of the guest device is taken into account is
> because once the guest device's tray is opened, any request on the same
> BlockBackend as the guest uses should fail. If the BDS tree is supposed
> to be usable even after ejecting it from the guest, a different
> BlockBackend must be used.
>
> Signed-off-by: Max Reitz <address@hidden>
> Reviewed-by: Eric Blake <address@hidden>
Do we want to include blk_drain() to make it a no-op instead of
crashing?
Also, we're now introducing BlockAIOCBs with a NULL bs with your use of
abort_aio_request. I haven't carefully reviewed the implications of this
yet, but that should definitely be done before we merge the series.
Kevin
- Re: [Qemu-devel] [PATCH v5 14/38] block: Remove wr_highest_sector from BlockAcctStats, (continued)
[Qemu-devel] [PATCH v5 15/38] block: Move BlockAcctStats into BlockBackend, Max Reitz, 2015/09/18
[Qemu-devel] [PATCH v5 16/38] block: Move I/O status and error actions into BB, Max Reitz, 2015/09/18
[Qemu-devel] [PATCH v5 17/38] block: Add BlockBackendRootState, Max Reitz, 2015/09/18
[Qemu-devel] [PATCH v5 18/38] block: Make some BB functions fall back to BBRS, Max Reitz, 2015/09/18
[Qemu-devel] [PATCH v5 19/38] block: Fail requests to empty BlockBackend, Max Reitz, 2015/09/18
- Re: [Qemu-devel] [PATCH v5 19/38] block: Fail requests to empty BlockBackend,
Kevin Wolf <=
[Qemu-devel] [PATCH v5 20/38] block: Prepare remaining BB functions for NULL BDS, Max Reitz, 2015/09/18
[Qemu-devel] [PATCH v5 21/38] block: Add blk_insert_bs(), Max Reitz, 2015/09/18
[Qemu-devel] [PATCH v5 22/38] block: Prepare for NULL BDS, Max Reitz, 2015/09/18