forked from Minki/linux
d1faacbf67
This reverts commitd07f3b081e. pstore-blk was fixed to avoid the unwanted APIs in commit7bb9557b48("pstore/blk: Use the normal block device I/O path"), which landed in the same release as the commit adding BROKEN. Cc: Jens Axboe <axboe@kernel.dk> Cc: Christoph Hellwig <hch@lst.de> Cc: stable@vger.kernel.org Signed-off-by: Kees Cook <keescook@chromium.org> Link: https://lore.kernel.org/r/20211116181559.3975566-1-keescook@chromium.org Signed-off-by: Jens Axboe <axboe@kernel.dk>
273 lines
8.3 KiB
Plaintext
273 lines
8.3 KiB
Plaintext
# SPDX-License-Identifier: GPL-2.0-only
|
|
config PSTORE
|
|
tristate "Persistent store support"
|
|
select CRYPTO if PSTORE_COMPRESS
|
|
default n
|
|
help
|
|
This option enables generic access to platform level
|
|
persistent storage via "pstore" filesystem that can
|
|
be mounted as /dev/pstore. Only useful if you have
|
|
a platform level driver that registers with pstore to
|
|
provide the data, so you probably should just go say "Y"
|
|
(or "M") to a platform specific persistent store driver
|
|
(e.g. ACPI_APEI on X86) which will select this for you.
|
|
If you don't have a platform persistent store driver,
|
|
say N.
|
|
|
|
config PSTORE_DEFAULT_KMSG_BYTES
|
|
int "Default kernel log storage space" if EXPERT
|
|
depends on PSTORE
|
|
default "10240"
|
|
help
|
|
Defines default size of pstore kernel log storage.
|
|
Can be enlarged if needed, not recommended to shrink it.
|
|
|
|
config PSTORE_DEFLATE_COMPRESS
|
|
tristate "DEFLATE (ZLIB) compression"
|
|
default y
|
|
depends on PSTORE
|
|
select CRYPTO_DEFLATE
|
|
help
|
|
This option enables DEFLATE (also known as ZLIB) compression
|
|
algorithm support.
|
|
|
|
config PSTORE_LZO_COMPRESS
|
|
tristate "LZO compression"
|
|
depends on PSTORE
|
|
select CRYPTO_LZO
|
|
help
|
|
This option enables LZO compression algorithm support.
|
|
|
|
config PSTORE_LZ4_COMPRESS
|
|
tristate "LZ4 compression"
|
|
depends on PSTORE
|
|
select CRYPTO_LZ4
|
|
help
|
|
This option enables LZ4 compression algorithm support.
|
|
|
|
config PSTORE_LZ4HC_COMPRESS
|
|
tristate "LZ4HC compression"
|
|
depends on PSTORE
|
|
select CRYPTO_LZ4HC
|
|
help
|
|
This option enables LZ4HC (high compression) mode algorithm.
|
|
|
|
config PSTORE_842_COMPRESS
|
|
bool "842 compression"
|
|
depends on PSTORE
|
|
select CRYPTO_842
|
|
help
|
|
This option enables 842 compression algorithm support.
|
|
|
|
config PSTORE_ZSTD_COMPRESS
|
|
bool "zstd compression"
|
|
depends on PSTORE
|
|
select CRYPTO_ZSTD
|
|
help
|
|
This option enables zstd compression algorithm support.
|
|
|
|
config PSTORE_COMPRESS
|
|
def_bool y
|
|
depends on PSTORE
|
|
depends on PSTORE_DEFLATE_COMPRESS || PSTORE_LZO_COMPRESS || \
|
|
PSTORE_LZ4_COMPRESS || PSTORE_LZ4HC_COMPRESS || \
|
|
PSTORE_842_COMPRESS || PSTORE_ZSTD_COMPRESS
|
|
|
|
choice
|
|
prompt "Default pstore compression algorithm"
|
|
depends on PSTORE_COMPRESS
|
|
help
|
|
This option chooses the default active compression algorithm.
|
|
This change be changed at boot with "pstore.compress=..." on
|
|
the kernel command line.
|
|
|
|
Currently, pstore has support for 6 compression algorithms:
|
|
deflate, lzo, lz4, lz4hc, 842 and zstd.
|
|
|
|
The default compression algorithm is deflate.
|
|
|
|
config PSTORE_DEFLATE_COMPRESS_DEFAULT
|
|
bool "deflate" if PSTORE_DEFLATE_COMPRESS
|
|
|
|
config PSTORE_LZO_COMPRESS_DEFAULT
|
|
bool "lzo" if PSTORE_LZO_COMPRESS
|
|
|
|
config PSTORE_LZ4_COMPRESS_DEFAULT
|
|
bool "lz4" if PSTORE_LZ4_COMPRESS
|
|
|
|
config PSTORE_LZ4HC_COMPRESS_DEFAULT
|
|
bool "lz4hc" if PSTORE_LZ4HC_COMPRESS
|
|
|
|
config PSTORE_842_COMPRESS_DEFAULT
|
|
bool "842" if PSTORE_842_COMPRESS
|
|
|
|
config PSTORE_ZSTD_COMPRESS_DEFAULT
|
|
bool "zstd" if PSTORE_ZSTD_COMPRESS
|
|
|
|
endchoice
|
|
|
|
config PSTORE_COMPRESS_DEFAULT
|
|
string
|
|
depends on PSTORE_COMPRESS
|
|
default "deflate" if PSTORE_DEFLATE_COMPRESS_DEFAULT
|
|
default "lzo" if PSTORE_LZO_COMPRESS_DEFAULT
|
|
default "lz4" if PSTORE_LZ4_COMPRESS_DEFAULT
|
|
default "lz4hc" if PSTORE_LZ4HC_COMPRESS_DEFAULT
|
|
default "842" if PSTORE_842_COMPRESS_DEFAULT
|
|
default "zstd" if PSTORE_ZSTD_COMPRESS_DEFAULT
|
|
|
|
config PSTORE_CONSOLE
|
|
bool "Log kernel console messages"
|
|
depends on PSTORE
|
|
help
|
|
When the option is enabled, pstore will log all kernel
|
|
messages, even if no oops or panic happened.
|
|
|
|
config PSTORE_PMSG
|
|
bool "Log user space messages"
|
|
depends on PSTORE
|
|
help
|
|
When the option is enabled, pstore will export a character
|
|
interface /dev/pmsg0 to log user space messages. On reboot
|
|
data can be retrieved from /sys/fs/pstore/pmsg-ramoops-[ID].
|
|
|
|
If unsure, say N.
|
|
|
|
config PSTORE_FTRACE
|
|
bool "Persistent function tracer"
|
|
depends on PSTORE
|
|
depends on FUNCTION_TRACER
|
|
depends on DEBUG_FS
|
|
help
|
|
With this option kernel traces function calls into a persistent
|
|
ram buffer that can be decoded and dumped after reboot through
|
|
pstore filesystem. It can be used to determine what function
|
|
was last called before a reset or panic.
|
|
|
|
If unsure, say N.
|
|
|
|
config PSTORE_RAM
|
|
tristate "Log panic/oops to a RAM buffer"
|
|
depends on PSTORE
|
|
depends on HAS_IOMEM
|
|
select REED_SOLOMON
|
|
select REED_SOLOMON_ENC8
|
|
select REED_SOLOMON_DEC8
|
|
help
|
|
This enables panic and oops messages to be logged to a circular
|
|
buffer in RAM where it can be read back at some later point.
|
|
|
|
Note that for historical reasons, the module will be named
|
|
"ramoops.ko".
|
|
|
|
For more information, see Documentation/admin-guide/ramoops.rst.
|
|
|
|
config PSTORE_ZONE
|
|
tristate
|
|
depends on PSTORE
|
|
help
|
|
The common layer for pstore/blk (and pstore/ram in the future)
|
|
to manage storage in zones.
|
|
|
|
config PSTORE_BLK
|
|
tristate "Log panic/oops to a block device"
|
|
depends on PSTORE
|
|
depends on BLOCK
|
|
select PSTORE_ZONE
|
|
default n
|
|
help
|
|
This enables panic and oops message to be logged to a block dev
|
|
where it can be read back at some later point.
|
|
|
|
For more information, see Documentation/admin-guide/pstore-blk.rst
|
|
|
|
If unsure, say N.
|
|
|
|
config PSTORE_BLK_BLKDEV
|
|
string "block device identifier"
|
|
depends on PSTORE_BLK
|
|
default ""
|
|
help
|
|
Which block device should be used for pstore/blk.
|
|
|
|
It accepts the following variants:
|
|
1) <hex_major><hex_minor> device number in hexadecimal representation,
|
|
with no leading 0x, for example b302.
|
|
2) /dev/<disk_name> represents the device name of disk
|
|
3) /dev/<disk_name><decimal> represents the device name and number
|
|
of partition - device number of disk plus the partition number
|
|
4) /dev/<disk_name>p<decimal> - same as the above, this form is
|
|
used when disk name of partitioned disk ends with a digit.
|
|
5) PARTUUID=00112233-4455-6677-8899-AABBCCDDEEFF representing the
|
|
unique id of a partition if the partition table provides it.
|
|
The UUID may be either an EFI/GPT UUID, or refer to an MSDOS
|
|
partition using the format SSSSSSSS-PP, where SSSSSSSS is a zero-
|
|
filled hex representation of the 32-bit "NT disk signature", and PP
|
|
is a zero-filled hex representation of the 1-based partition number.
|
|
6) PARTUUID=<UUID>/PARTNROFF=<int> to select a partition in relation
|
|
to a partition with a known unique id.
|
|
7) <major>:<minor> major and minor number of the device separated by
|
|
a colon.
|
|
|
|
NOTE that, both Kconfig and module parameters can configure
|
|
pstore/blk, but module parameters have priority over Kconfig.
|
|
|
|
config PSTORE_BLK_KMSG_SIZE
|
|
int "Size in Kbytes of kmsg dump log to store"
|
|
depends on PSTORE_BLK
|
|
default 64
|
|
help
|
|
This just sets size of kmsg dump (oops, panic, etc) log for
|
|
pstore/blk. The size is in KB and must be a multiple of 4.
|
|
|
|
NOTE that, both Kconfig and module parameters can configure
|
|
pstore/blk, but module parameters have priority over Kconfig.
|
|
|
|
config PSTORE_BLK_MAX_REASON
|
|
int "Maximum kmsg dump reason to store"
|
|
depends on PSTORE_BLK
|
|
default 2
|
|
help
|
|
The maximum reason for kmsg dumps to store. The default is
|
|
2 (KMSG_DUMP_OOPS), see include/linux/kmsg_dump.h's
|
|
enum kmsg_dump_reason for more details.
|
|
|
|
NOTE that, both Kconfig and module parameters can configure
|
|
pstore/blk, but module parameters have priority over Kconfig.
|
|
|
|
config PSTORE_BLK_PMSG_SIZE
|
|
int "Size in Kbytes of pmsg to store"
|
|
depends on PSTORE_BLK
|
|
depends on PSTORE_PMSG
|
|
default 64
|
|
help
|
|
This just sets size of pmsg (pmsg_size) for pstore/blk. The size is
|
|
in KB and must be a multiple of 4.
|
|
|
|
NOTE that, both Kconfig and module parameters can configure
|
|
pstore/blk, but module parameters have priority over Kconfig.
|
|
|
|
config PSTORE_BLK_CONSOLE_SIZE
|
|
int "Size in Kbytes of console log to store"
|
|
depends on PSTORE_BLK
|
|
depends on PSTORE_CONSOLE
|
|
default 64
|
|
help
|
|
This just sets size of console log (console_size) to store via
|
|
pstore/blk. The size is in KB and must be a multiple of 4.
|
|
|
|
NOTE that, both Kconfig and module parameters can configure
|
|
pstore/blk, but module parameters have priority over Kconfig.
|
|
|
|
config PSTORE_BLK_FTRACE_SIZE
|
|
int "Size in Kbytes of ftrace log to store"
|
|
depends on PSTORE_BLK
|
|
depends on PSTORE_FTRACE
|
|
default 64
|
|
help
|
|
This just sets size of ftrace log (ftrace_size) for pstore/blk. The
|
|
size is in KB and must be a multiple of 4.
|
|
|
|
NOTE that, both Kconfig and module parameters can configure
|
|
pstore/blk, but module parameters have priority over Kconfig.
|