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| author | WeiXiong Liao <liaoweixiong@allwinnertech.com> | 2020-03-25 09:55:06 +0100 |
|---|---|---|
| committer | Kees Cook <keescook@chromium.org> | 2020-06-01 04:49:01 +0200 |
| commit | 78c08247b9d3e03192f8b359aa079024e805a948 (patch) | |
| tree | ebc4c79461299d67d159c672c86b52e6b6c8acc7 /drivers/mtd/Makefile | |
| parent | pstore/blk: Introduce "best_effort" mode (diff) | |
| download | linux-78c08247b9d3e03192f8b359aa079024e805a948.tar.xz linux-78c08247b9d3e03192f8b359aa079024e805a948.zip | |
mtd: Support kmsg dumper based on pstore/blk
This introduces mtdpstore, which is similar to mtdoops but more
powerful. It uses pstore/blk, and aims to store panic and oops logs to
a flash partition, where pstore can later read back and present as files
in the mounted pstore filesystem.
To make mtdpstore work, the "blkdev" of pstore/blk should be set
as MTD device name or MTD device number. For more details, see
Documentation/admin-guide/pstore-blk.rst
This solves a number of issues:
- Work duplication: both of pstore and mtdoops do the same job storing
panic/oops log. They have very similar logic, registering to kmsg
dumper and storing logs to several chunks one by one.
- Layer violations: drivers should provides methods instead of polices.
MTD should provide read/write/erase operations, and allow a higher
level drivers to provide the chunk management, kmsg dump
configuration, etc.
- Missing features: pstore provides many additional features, including
presenting the logs as files, logging dump time and count, and
supporting other frontends like pmsg, console, etc.
Signed-off-by: WeiXiong Liao <liaoweixiong@allwinnertech.com>
Link: https://lore.kernel.org/lkml/20200511233229.27745-11-keescook@chromium.org/
Link: https://lore.kernel.org/r/1589266715-4168-1-git-send-email-liaoweixiong@allwinnertech.com
Signed-off-by: Kees Cook <keescook@chromium.org>
Diffstat (limited to 'drivers/mtd/Makefile')
| -rw-r--r-- | drivers/mtd/Makefile | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/mtd/Makefile b/drivers/mtd/Makefile index 56cc60ccc477..593d0593a038 100644 --- a/drivers/mtd/Makefile +++ b/drivers/mtd/Makefile @@ -20,6 +20,7 @@ obj-$(CONFIG_RFD_FTL) += rfd_ftl.o obj-$(CONFIG_SSFDC) += ssfdc.o obj-$(CONFIG_SM_FTL) += sm_ftl.o obj-$(CONFIG_MTD_OOPS) += mtdoops.o +obj-$(CONFIG_MTD_PSTORE) += mtdpstore.o obj-$(CONFIG_MTD_SWAP) += mtdswap.o nftl-objs := nftlcore.o nftlmount.o |