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Date:   Sat,  9 May 2020 16:40:45 -0700
From:   Kees Cook <>
To:     WeiXiong Liao <>
Cc:     Kees Cook <>,
        Anton Vorontsov <>,
        Colin Cross <>,
        Tony Luck <>,
        Jonathan Corbet <>,
        Miquel Raynal <>,
        Richard Weinberger <>,
        Vignesh Raghavendra <>,
        Petr Mladek <>,
        Sergey Senozhatsky <>,
        Steven Rostedt <>,
        Rob Herring <>,
        Pavel Tatashin <>,,,
Subject: [PATCH v6 00/18] pstore: mtd: support crash log to block and mtd device


Okay, I'm happy enough with this series to get it landed so we can start
doing incremental changes, etc. Here's the v6 I'll land in for-next/pstore
unless there's some objection.

Thank you again for all your patience! As you can see, I had a lot of
things I needed to fix up in the core pstore code, and I had a lot of
opinions about names. ;) I'm glad to have a block device backend for
this -- it makes testing the core much easier.

After spending so much time looking at pstore/zone, I've got some ideas
about how to merge it with pstore/ram's way of doing things. For example,
I'd like to get ECC support into pstore/zone, and once it's generalized
enough, I think other storage systems (EFI?) could use it to solve
some problems there (growing without bounds, not supporting the other
frontends, etc).

One last thought I had on naming would be to have mtdpstore be named
pstore_mtd.c, etc. That'd make it more like pstore/zone,blk,ram,
etc. (I'd really like to get pstore/ram renamed and keep the "ramoops"
name for backward compat.) What do you think about that?



- more renamings, typo fixes, rewordings
- reset pstore_zone global counters/state on unregister
- add best_effort param to allow easy block device testing
- extract ftrace merging code from ram.c to avoid duplication
- use backend name for console name
- rearrange module parameters


Kees Cook (8):
  pstore/ram: Move dump_oops to end of module_param list
  pstore/platform: Switch pstore_info::name to const
  pstore/platform: Move module params after declarations
  pstore/platform: Use backend name for console registration
  pstore/ram: Refactor ftrace buffer merging
  pstore/ftrace: Provide ftrace log merging routine
  printk: Introduce kmsg_dump_reason_str()
  pstore/blk: Introduce "best_effort" mode

WeiXiong Liao (10):
  pstore/zone: Introduce common layer to manage storage zones
  pstore/blk: Introduce backend for block devices
  pstore/zone,blk: Add support for pmsg frontend
  pstore/zone,blk: Add console frontend support
  pstore/zone,blk: Add ftrace frontend support
  Documentation: Add details for pstore/blk
  pstore/zone: Provide way to skip "broken" zone for MTD devices
  pstore/blk: Provide way to query pstore configuration
  pstore/blk: Support non-block storage devices
  mtd: Support kmsg dumper based on pstore/blk

 Documentation/admin-guide/pstore-blk.rst |  243 ++++
 MAINTAINERS                              |    1 +
 drivers/mtd/Kconfig                      |   10 +
 drivers/mtd/Makefile                     |    1 +
 drivers/mtd/mtdpstore.c                  |  564 +++++++++
 fs/pstore/Kconfig                        |  109 ++
 fs/pstore/Makefile                       |    6 +
 fs/pstore/blk.c                          |  571 +++++++++
 fs/pstore/ftrace.c                       |   54 +
 fs/pstore/internal.h                     |    9 +
 fs/pstore/platform.c                     |   40 +-
 fs/pstore/ram.c                          |   70 +-
 fs/pstore/zone.c                         | 1463 ++++++++++++++++++++++
 include/linux/kmsg_dump.h                |    7 +
 include/linux/pstore.h                   |    2 +-
 include/linux/pstore_blk.h               |   77 ++
 include/linux/pstore_zone.h              |   60 +
 kernel/printk/printk.c                   |   21 +
 18 files changed, 3220 insertions(+), 88 deletions(-)
 create mode 100644 Documentation/admin-guide/pstore-blk.rst
 create mode 100644 drivers/mtd/mtdpstore.c
 create mode 100644 fs/pstore/blk.c
 create mode 100644 fs/pstore/zone.c
 create mode 100644 include/linux/pstore_blk.h
 create mode 100644 include/linux/pstore_zone.h


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