From: Jiri Pirko <jiri@resnulli.us>
To: Jacob Keller <jacob.e.keller@intel.com>
Cc: netdev@vger.kernel.org, Jonathan Corbet <corbet@lwn.net>,
Jiri Pirko <jiri@nvidia.com>,
"David S. Miller" <davem@davemloft.net>,
Eric Dumazet <edumazet@google.com>,
Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>,
Tony Nguyen <anthony.l.nguyen@intel.com>,
David Ahern <dsahern@kernel.org>,
Stephen Hemminger <stephen@networkplumber.org>,
linux-doc@vger.kernel.org
Subject: Re: [iproute2-next v3 3/3] devlink: add dry run attribute support to devlink flash
Date: Tue, 26 Jul 2022 09:47:54 +0200 [thread overview]
Message-ID: <Yt+cKiYYLPXEXH1G@nanopsycho> (raw)
In-Reply-To: <20220725205650.4018731-4-jacob.e.keller@intel.com>
Mon, Jul 25, 2022 at 10:56:50PM CEST, jacob.e.keller@intel.com wrote:
>Recent versions of the kernel support the DEVLINK_ATTR_DRY_RUN attribute
>which allows requesting a dry run of a command. A dry run is simply
>a request to validate that a command would work, without performing any
>destructive changes.
>
>The attribute is supported by the devlink flash update as a way to
>validate an update, including potentially the binary image, without
>modifying the device.
>
>Add a "dry_run" option to the command line parsing which will enable
>this attribute when requested.
>
>To avoid potential issues, only allow the attribute to be added to
>commands when the kernel recognizes it. This is important because some
>commands do not perform strict validation. If we were to add the
>attribute without this check, an old kernel may silently accept the
>command and perform an update even when dry_run was requested.
>
>Before adding the attribute, check the maximum attribute from the
>CTRL_CMD_GETFAMILY and make sure that the kernel recognizes the
>DEVLINK_ATTR_DRY_RUN attribute.
>
>Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Reviewed-by: Jiri Pirko <jiri@nvidia.com>
prev parent reply other threads:[~2022-07-26 7:48 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-07-25 20:56 [iproute2-next v3 0/3] devlink: support dry run attribute for flash update Jacob Keller
2022-07-25 20:56 ` [iproute2-next v3 1/3] update <linux/devlink.h> UAPI header Jacob Keller
2022-07-25 20:56 ` [iproute2-next v3 2/3] mnlg: add function to get CTRL_ATTR_MAXATTR value Jacob Keller
2022-07-26 7:46 ` Jiri Pirko
2022-08-26 0:40 ` Keller, Jacob E
2022-08-26 8:38 ` Jiri Pirko
2022-07-25 20:56 ` [iproute2-next v3 3/3] devlink: add dry run attribute support to devlink flash Jacob Keller
2022-07-25 21:13 ` Stephen Hemminger
2022-07-25 21:19 ` Keller, Jacob E
2022-07-25 21:27 ` Keller, Jacob E
2022-07-26 7:47 ` Jiri Pirko [this message]
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