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From 88a1a0d9cde76b79a59e6177a1dcdf036ec4cea0 Mon Sep 17 00:00:00 2001
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Message-Id: <88a1a0d9cde76b79a59e6177a1dcdf036ec4cea0@dist-git>
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From: Peter Krempa <pkrempa@redhat.com>
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Date: Wed, 3 Apr 2019 16:35:44 +0200
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Subject: [PATCH] virsh: man: Document quirks of device-detach and friends
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Mention that successful return does not equal to device being detached
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similarly as we do at the API level.
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Signed-off-by: Peter Krempa <pkrempa@redhat.com>
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Reviewed-by: Erik Skultety <eskultet@redhat.com>
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(cherry picked from commit e95a66349a751694cf173efa1581712b6fb99851)
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https: //bugzilla.redhat.com/show_bug.cgi?id=1688961
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Message-Id: <7d04a65a6b2dbb7f4ca69d128838437b3e05c5b7.1554302031.git.pkrempa@redhat.com>
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Reviewed-by: Andrea Bolognani <abologna@redhat.com>
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---
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tools/virsh.pod | 14 ++++++++++++++
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1 file changed, 14 insertions(+)
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diff --git a/tools/virsh.pod b/tools/virsh.pod
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index 00cbee19b6..5321f6806a 100644
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--- a/tools/virsh.pod
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+++ b/tools/virsh.pod
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@@ -3188,6 +3188,16 @@ or attempting to detach a device that is not present in the domain XML,
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but shares some specific attributes with one that is present,
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may lead to unexpected results.
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+B<Quirk>: Device unplug is asynchronous in most cases and requires guest
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+cooperation. This means that it's up to the discretion of the guest to disallow
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+or delay the unplug arbitrarily. As the libvirt API used in this command was
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+designed as synchronous it returns success after some timeout even if the device
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+was not unplugged yet to allow further interactions with the domain e.g. if the
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+guest is unresponsive. Callers which need to make sure that the
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+device was unplugged can use libvirt events (see virsh event) to be notified
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+when the device is removed. Note that the event may arrive before the command
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+returns.
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+
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If I<--live> is specified, affect a running domain.
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If I<--config> is specified, affect the next startup of a persistent domain.
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If I<--current> is specified, affect the current domain state.
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@@ -3235,6 +3245,8 @@ I<--persistent>.
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If B<--print-xml> is specified, then the XML which would be used to detach the
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disk is printed instead.
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+Please see documentation for B<detach-device> for known quirks.
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+
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=item B<detach-interface> I<domain> I<type> [I<--mac mac>]
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[[[I<--live>] [I<--config>] | [I<--current>]] | [I<--persistent>]]
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@@ -3257,6 +3269,8 @@ an offline domain, and like I<--live> I<--config> for a running domain.
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Note that older versions of virsh used I<--config> as an alias for
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I<--persistent>.
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+Please see documentation for B<detach-device> for known quirks.
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+
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=item B<update-device> I<domain> I<file> [I<--force>]
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[[[I<--live>] [I<--config>] | [I<--current>]] | [I<--persistent>]]
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--
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2.21.0
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