From: Paolo Bonzini <pbonzini@redhat.com>
To: Kevin Wolf <kwolf@redhat.com>
Cc: pl@kamp.de, qemu-devel@nongnu.org, stefanha@redhat.com,
qemu-stable@nongnu.org
Subject: Re: [Qemu-devel] [PATCH v3 07/19] block: expect errors from bdrv_co_is_allocated
Date: Mon, 29 Jul 2013 16:03:47 +0200 [thread overview]
Message-ID: <51F67643.4030108@redhat.com> (raw)
In-Reply-To: <20130729134349.GI10467@dhcp-200-207.str.redhat.com>
Il 29/07/2013 15:43, Kevin Wolf ha scritto:
> Am 25.07.2013 um 16:23 hat Paolo Bonzini geschrieben:
>> Some bdrv_is_allocated callers do not expect errors, but the fallback
>> in qcow2.c might make other callers trip on assertion failures or
>> infinite loops.
>>
>> Fix the callers to always look for errors.
>>
>> Cc: qemu-stable@nongnu.org
>> Reviewed-by: Eric Blake <eblake@redhat.com>
>> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
>
> Good idea, but there seem to be a few more callers that don't handle
> errors yet. Not sure what your criterion for fixing callers or not was.
> Did you simply miss the rest?
In general, I didn't bother about callers that didn't handle *pnum = 0
correctly (for example block-migration.c and commit). But I see now
that the ones in qemu-io-cmds.c are due to a bad rebase.
(BTW, I just noticed now that both block-migration.c and commit also run
outside a coroutine, and thus rely on bdrv_is_allocated creating one).
Paolo
next prev parent reply other threads:[~2013-07-29 14:04 UTC|newest]
Thread overview: 56+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-07-25 14:22 [Qemu-devel] [PATCH v3 00/19] Add qemu-img subcommand to dump file metadata Paolo Bonzini
2013-07-25 14:22 ` [Qemu-devel] [PATCH v3 01/19] cow: make reads go at a decent speed Paolo Bonzini
2013-07-25 14:23 ` [Qemu-devel] [PATCH v3 02/19] cow: make writes go at a less indecent speed Paolo Bonzini
2013-07-25 14:23 ` [Qemu-devel] [PATCH v3 03/19] cow: do not call bdrv_co_is_allocated Paolo Bonzini
2013-07-29 13:22 ` Kevin Wolf
2013-07-25 14:23 ` [Qemu-devel] [PATCH v3 04/19] block: update bs->total_sectors on writes Paolo Bonzini
2013-07-29 13:13 ` Kevin Wolf
2013-07-29 13:47 ` Paolo Bonzini
2013-07-29 14:10 ` Kevin Wolf
2013-07-29 14:18 ` Paolo Bonzini
2013-08-02 7:05 ` Peter Lieven
2013-08-17 6:27 ` Paolo Bonzini
2013-09-02 7:12 ` Peter Lieven
2013-07-25 14:23 ` [Qemu-devel] [PATCH v3 05/19] block: make bdrv_co_is_allocated static Paolo Bonzini
2013-07-29 13:21 ` Kevin Wolf
2013-07-29 13:56 ` Paolo Bonzini
2013-07-25 14:23 ` [Qemu-devel] [PATCH v3 06/19] block: remove bdrv_is_allocated_above/bdrv_co_is_allocated_above distinction Paolo Bonzini
2013-07-29 13:34 ` Kevin Wolf
2013-07-29 13:59 ` Paolo Bonzini
2013-07-29 14:15 ` Kevin Wolf
2013-07-25 14:23 ` [Qemu-devel] [PATCH v3 07/19] block: expect errors from bdrv_co_is_allocated Paolo Bonzini
2013-07-29 13:43 ` Kevin Wolf
2013-07-29 14:03 ` Paolo Bonzini [this message]
2013-07-29 14:17 ` Kevin Wolf
2013-07-25 14:23 ` [Qemu-devel] [PATCH v3 08/19] qemu-img: always probe the input image for allocated sectors Paolo Bonzini
2013-07-25 14:23 ` [Qemu-devel] [PATCH v3 09/19] block: make bdrv_has_zero_init return false for copy-on-write-images Paolo Bonzini
2013-07-25 14:23 ` [Qemu-devel] [PATCH v3 10/19] block: introduce bdrv_get_block_status API Paolo Bonzini
2013-07-25 14:23 ` [Qemu-devel] [PATCH v3 11/19] block: define get_block_status return value Paolo Bonzini
2013-07-30 14:14 ` Kevin Wolf
2013-07-30 14:19 ` Paolo Bonzini
2013-07-30 14:26 ` Kevin Wolf
2013-07-25 14:23 ` [Qemu-devel] [PATCH v3 12/19] block: return get_block_status data and flags for formats Paolo Bonzini
2013-07-30 14:40 ` Kevin Wolf
2013-07-30 15:15 ` Paolo Bonzini
2013-07-30 15:23 ` Kevin Wolf
2013-07-25 14:23 ` [Qemu-devel] [PATCH v3 13/19] qemu-img: add a "map" subcommand Paolo Bonzini
2013-07-30 15:13 ` Kevin Wolf
2013-07-30 15:22 ` Paolo Bonzini
2013-07-30 15:30 ` Kevin Wolf
2013-07-31 8:57 ` Kevin Wolf
2013-07-31 12:13 ` Paolo Bonzini
2013-07-31 13:26 ` Kevin Wolf
2013-07-25 14:23 ` [Qemu-devel] [PATCH v3 14/19] docs, qapi: document qemu-img map Paolo Bonzini
2013-07-30 15:48 ` Eric Blake
2013-07-30 15:54 ` Paolo Bonzini
2013-07-25 14:23 ` [Qemu-devel] [PATCH v3 15/19] block: use bdrv_has_zero_init to return BDRV_BLOCK_ZERO Paolo Bonzini
2013-07-31 9:16 ` Kevin Wolf
2013-07-25 14:23 ` [Qemu-devel] [PATCH v3 16/19] raw-posix: return get_block_status data and flags Paolo Bonzini
2013-07-25 14:23 ` [Qemu-devel] [PATCH v3 17/19] raw-posix: detect XFS unwritten extents Paolo Bonzini
2013-07-25 14:23 ` [Qemu-devel] [PATCH v3 18/19] block: add default get_block_status implementation for protocols Paolo Bonzini
2013-07-31 9:12 ` Kevin Wolf
2013-07-31 12:49 ` Paolo Bonzini
2013-07-25 14:23 ` [Qemu-devel] [PATCH v3 19/19] block: look for zero blocks in bs->file Paolo Bonzini
2013-07-31 9:21 ` Kevin Wolf
2013-07-31 12:53 ` Paolo Bonzini
2013-08-16 15:30 ` [Qemu-devel] [PATCH v3 00/19] Add qemu-img subcommand to dump file metadata Stefan Hajnoczi
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