[dm-devel] [PATCH 00/23] libmultipath: improve cleanup on exit

[Benjamin Marzinski]

On Thu, Sep 24, 2020 at 03:40:31PM +0200, mwilck at suse.com wrote:
> From: Martin Wilck <mwilck at suse.com>
> 
> Hi Christophe, hi Ben, hi lixiaokeng,
> 
> this series was inspired by lixiaokeng's recent posting "[QUESTION] memory
> leak in main (multipath)". It implements my first idea, registering
> cleanup handlers with atexit(). However it turned out to be quite
> complex. In particular multipathd has a lot of things to clean up.
> 
> This series is based on the previous series "multipath-tools: shutdown, 
> libdevmapper races, globals".
> 
> While the bulk of the series is the cleanup handling, it also contains
> some bug fixes for issues that I found while working on this.
> 
> Regards
> Martin
> 
Reviewed-by: Benjamin Marzinski <bmarzins at redhat.com>
For all patches except 1, 7, 14, 18, & 23
> Martin Wilck (23):
>   multipathd: uxlsnr: avoid deadlock on exit
>   multipathd: Fix liburcu memory leak
>   multipathd: move handling of io_err_stat_attr into libmultipath
>   multipathd: move vecs desctruction into cleanup function
>   multipathd: make some globals static
>   multipathd: move threads destruction into separate function
>   multipathd: move conf destruction into separate function
>   multipathd: move pid destruction into separate function
>   multipathd: close pidfile on exit
>   multipathd: add helper for systemd notification at exit
>   multipathd: child(): call cleanups in failure case, too
>   multipathd: unwatch_all_dmevents: check if waiter is initialized
>   multipathd: print error message if config can't be loaded
>   libmultipath: add libmp_dm_exit()
>   multipathd: fixup libdm deinitialization
>   libmultipath: log_thread_stop(): check if logarea is initialized
>   multipathd: add cleanup_child() exit handler
>   libmultipath: fix log_thread startup and teardown
>   multipathd: move cleanup_{prio,checkers,foreign} to libmultipath_exit
>   multipath: use atexit() for cleanup handlers
>   mpathpersist: use atexit() for cleanup handlers
>   multipath: fix leaks in check_path_valid()
>   multipath-tools: mpath-tools.supp: file with valgrind suppressions
> 
>  libmpathpersist/mpath_persist.c       |   2 -
>  libmultipath/config.c                 |   5 +
>  libmultipath/config.h                 |   2 +
>  libmultipath/devmapper.c              |  10 +
>  libmultipath/devmapper.h              |   1 +
>  libmultipath/io_err_stat.c            |   7 +-
>  libmultipath/libmultipath.version     |  26 +--
>  libmultipath/log_pthread.c            |  60 +++--
>  mpathpersist/main.c                   |   5 +-
>  multipath/main.c                      |  94 +++++---
>  multipathd/dmevents.c                 |   2 +
>  multipathd/main.c                     | 305 +++++++++++++++++---------
>  multipathd/uxlsnr.c                   |  17 +-
>  third-party/valgrind/mpath-tools.supp |  33 +++
>  14 files changed, 389 insertions(+), 180 deletions(-)
>  create mode 100644 third-party/valgrind/mpath-tools.supp
> 
> -- 
> 2.28.0