[PATCH v6 00/18] pstore: mtd: support crash log to block and mtd device

[Kees Cook]

Hi,

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?

Thanks!

-Kees


v6:
- 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

v5: https://lore.kernel.org/lkml/1589022854-19821-1-git-send-email-liaoweixiong@xxxxxxxxxxxxxxxxx/
v4: https://lore.kernel.org/lkml/20200508064004.57898-1-keescook@xxxxxxxxxxxx/
v3: https://lore.kernel.org/lkml/1585126506-18635-1-git-send-email-liaoweixiong@xxxxxxxxxxxxxxxxx/
v2: https://lore.kernel.org/lkml/1581078355-19647-1-git-send-email-liaoweixiong@xxxxxxxxxxxxxxxxx/
v1: https://lore.kernel.org/lkml/1579482233-2672-1-git-send-email-liaoweixiong@xxxxxxxxxxxxxxxxx/


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

-- 
2.20.1