netdev - [patch net-next v2 0/4] net: devlink: sync flash and dev info commands

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Message-Id: <20220822170247.974743-1-jiri@resnulli.us>
Date:   Mon, 22 Aug 2022 19:02:43 +0200
From:   Jiri Pirko <jiri@...nulli.us>
To:     netdev@...r.kernel.org
Cc:     davem@...emloft.net, kuba@...nel.org, idosch@...dia.com,
        pabeni@...hat.com, edumazet@...gle.com, saeedm@...dia.com,
        jacob.e.keller@...el.com, vikas.gupta@...adcom.com,
        gospo@...adcom.com
Subject: [patch net-next v2 0/4] net: devlink: sync flash and dev info commands

From: Jiri Pirko <jiri@...dia.com>

Purpose of this patchset is to introduce consistency between two devlink
commands:
  devlink dev info
    Shows versions of running default flash target and components.
  devlink dev flash
    Flashes default flash target or component name (if specified
    on cmdline).

Currently it is up to the driver what versions to expose and what flash
update component names to accept. This is inconsistent. Thankfully, only
netdevsim currently using components so it is still time
to sanitize this.

This patchset makes sure, that devlink.c calls into driver for
component flash update only in case the driver exposes the same version
name.

Also there a new flag exposed to the use over netlink for versions.
If driver considers the version represents flashable component,
DEVLINK_ATTR_INFO_VERSION_IS_COMPONENT is set. This provides a list of
component names for the user.

Example:
$ devlink dev info
netdevsim/netdevsim10:
  driver netdevsim
  versions:
      running:
        fw.mgmt 10.20.30
        fw 11.22.33
      flash_components:
        fw.mgmt
$ devlink dev flash netdevsim/netdevsim10 file somefile.bin
[fw.mgmt] Preparing to flash
[fw.mgmt] Flashing 100%
[fw.mgmt] Flash select
[fw.mgmt] Flashing done
$ devlink dev flash netdevsim/netdevsim10 file somefile.bin component fw.mgmt
[fw.mgmt] Preparing to flash
[fw.mgmt] Flashing 100%
[fw.mgmt] Flash select
[fw.mgmt] Flashing done
$ devlink dev flash netdevsim/netdevsim10 file somefile.bin component dummy
Error: selected component is not supported by this device.

---
v1->v2:
- see changelog of individual patches, no code changes, just split patch
- removed patches that exposed "default flash target"

Jiri Pirko (4):
  net: devlink: extend info_get() version put to indicate a flash
    component
  netdevsim: add version fw.mgmt info info_get() and mark as a component
  net: devlink: limit flash component name to match version returned by
    info_get()
  net: devlink: expose the info about version representing a component

 drivers/net/netdevsim/dev.c  |  12 +++-
 include/net/devlink.h        |  15 +++-
 include/uapi/linux/devlink.h |   2 +
 net/core/devlink.c           | 133 +++++++++++++++++++++++++++++------
 4 files changed, 136 insertions(+), 26 deletions(-)

-- 
2.37.1