[dm-devel] [PATCH v3 0/4] add library to check if device is a valid path

[Martin Wilck]

On Wed, 2020-10-21 at 16:39 -0500, Benjamin Marzinski wrote:
> The main part of the this patchset is the first patch, which adds a
> new library interface to check whether devices are valid paths. This
> was designed for use in the Storage Instantiation Daemon (SID).
> 
> https://github.com/sid-project
> 
> The seconds patch adds unit tests for this library. The third patch
> adds
> get_uid fallback code for dasd devices. The fourth patch just changes
> the get_uid log level for devices configured with uid_attribute "".
> This
> is because it is currently necessary to configure multipath with
> 
> overrides {
>         uid_attribute ""
> }
> 
> to claim multipath devices with SID (instead of using
> multipath.rules),
> since SID doesn't currently get the UID information itself, and it is
> called by udev before this information is added to the udev database.
> 
> changes from v1 to v2
> ---------------------
> 0001: This patch is now rebased on top of, and makes use of Martin's
> patches that provide a default *_multipath_config, udev, and logsink.
> Because of this, mpathvalid_init() now has a parameter used to set
> logsink. There is also a new API function,
> mpathvalid_reload_config().
> 
> 0003: This is completely new, since Martin pointed out that adding a
> new
> config option to always use the fallback getuid code was unnecessary.
> It
> just makes a uid_attribute of "" log at normal levels.
> 
> changes from v2 to v3
> ---------------------
> 0001:   rebased on top of Martin's latest patches, fixed some small
> bugs
>         and added documentation to mpath_valid.h
> 0002:   New
> 0004:   was 0003. Untangled the logic, at Martin's suggestion.
> 
> Benjamin Marzinski (4):
>   multipath: add libmpathvalid library
>   multipath-tools tests: and unit tests for libmpathvalid
>   libmultipath: add uid failback for dasd devices
>   libmultipath: change log level for null uid_attribute
> 
>  Makefile                            |   3 +-
>  Makefile.inc                        |   1 +
>  libmpathvalid/Makefile              |  39 +++
>  libmpathvalid/libmpathvalid.version |  10 +
>  libmpathvalid/mpath_valid.c         | 202 ++++++++++++
>  libmpathvalid/mpath_valid.h         | 155 +++++++++
>  libmultipath/defaults.h             |   1 +
>  libmultipath/discovery.c            |  45 ++-
>  libmultipath/libmultipath.version   |   6 +
>  tests/Makefile                      |   5 +-
>  tests/mpathvalid.c                  | 467
> ++++++++++++++++++++++++++++
>  11 files changed, 929 insertions(+), 5 deletions(-)
>  create mode 100644 libmpathvalid/Makefile
>  create mode 100644 libmpathvalid/libmpathvalid.version
>  create mode 100644 libmpathvalid/mpath_valid.c
>  create mode 100644 libmpathvalid/mpath_valid.h
>  create mode 100644 tests/mpathvalid.c

As you probably saw, all acked. However there's a small problem with
the rebase on my recent patches. They aren't all acked yet, and Xose's
report about uclibc made me realize that there are more issues with
uclibc in my series. I don't think this will require major changes,
but e.g. on_exit() is unavailable in uclibc. I'd like to rework those.

Also, I'd wish that Christophe tags a new libmultipath version before
applying the "library version" series and everything thereafter.

Martin

-- 
Dr. Martin Wilck <mwilck at suse.com>, Tel. +49 (0)911 74053 2107
SUSE  Software Solutions Germany GmbH
HRB 36809, AG Nürnberg GF: Felix
Imendörffer