From: Kevin Wolf <kwolf@redhat.com>
To: qemu-block@nongnu.org
Cc: mreitz@redhat.com, famz@redhat.com, qemu-devel@nongnu.org
Subject: Re: [Qemu-devel] [PATCH 0/6] block: Fix permissions after ro/rw reopen
Date: Wed, 20 Sep 2017 12:33:41 +0200 [thread overview]
Message-ID: <20170920103341.GC4730@localhost.localdomain> (raw)
In-Reply-To: <20170915101008.16646-1-kwolf@redhat.com>
Am 15.09.2017 um 12:10 hat Kevin Wolf geschrieben:
> bdrv_reopen() can switch nodes between read-only and read-write modes.
> This has implications for the required permissions on their child nodes.
> For example, a qcow2 node requests write permissions on bs->file only if
> it is writable itself.
>
> This means that during bdrv_reopen(), the permissions need to be
> recalculated in order to prevent failures where the bs->file
> permissions don't match its actual read-only state (e.g. bs->file is a
> read-write node, but the permission still enforces read-only access).
Applied to the block branch.
Kevin
prev parent reply other threads:[~2017-09-20 14:13 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-09-15 10:10 [Qemu-devel] [PATCH 0/6] block: Fix permissions after ro/rw reopen Kevin Wolf
2017-09-15 10:10 ` [Qemu-devel] [PATCH 1/6] qemu-io: Reset qemuio_blk permissions before each command Kevin Wolf
2017-09-15 17:44 ` Eric Blake
2017-09-18 7:16 ` Fam Zheng
2017-09-21 13:53 ` Kevin Wolf
2017-09-22 10:46 ` [Qemu-devel] [Qemu-block] " Kevin Wolf
2017-09-22 12:55 ` [Qemu-devel] [PATCH v2 1/6] qemu-io: Drop write permissions before read-only reopen Kevin Wolf
2017-09-22 13:22 ` Fam Zheng
2017-09-15 10:10 ` [Qemu-devel] [PATCH 2/6] block: Add reopen_queue to bdrv_child_perm() Kevin Wolf
2017-09-15 17:51 ` Eric Blake
2017-09-15 10:10 ` [Qemu-devel] [PATCH 3/6] block: Add reopen queue to bdrv_check_perm() Kevin Wolf
2017-09-15 18:39 ` Eric Blake
2017-09-15 10:10 ` [Qemu-devel] [PATCH 4/6] block: Base permissions on rw state after reopen Kevin Wolf
2017-09-15 18:58 ` Eric Blake
2017-09-15 10:10 ` [Qemu-devel] [PATCH 5/6] block: reopen: Queue children after their parents Kevin Wolf
2017-09-15 19:01 ` Eric Blake
2017-09-15 10:10 ` [Qemu-devel] [PATCH 6/6] block: Fix permissions after bdrv_reopen() Kevin Wolf
2017-09-15 19:06 ` Eric Blake
2017-09-18 9:35 ` Kevin Wolf
2017-09-18 7:37 ` Fam Zheng
2017-09-18 7:43 ` Kevin Wolf
2017-09-15 17:02 ` [Qemu-devel] [PATCH 7/6] qemu-iotests: Test change-backing-file command Kevin Wolf
2017-09-15 19:14 ` Eric Blake
2017-09-18 7:51 ` [Qemu-devel] [PATCH 0/6] block: Fix permissions after ro/rw reopen Fam Zheng
2017-09-18 8:11 ` Kevin Wolf
2017-09-18 11:53 ` Fam Zheng
2017-09-18 12:11 ` Kevin Wolf
2017-09-18 12:32 ` Fam Zheng
2017-09-20 10:33 ` Kevin Wolf [this message]
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