On 5/10/20 1:24 PM, Kees Cook wrote:
> diff --git a/fs/pstore/Kconfig b/fs/pstore/Kconfig
> index 98d2457bdd9f..92ba73bd0b62 100644
> --- a/fs/pstore/Kconfig
> +++ b/fs/pstore/Kconfig
> @@ -160,3 +160,67 @@ config PSTORE_ZONE
> 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.
> +
> + 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 accept the following variants:
> + 1) <hex_major><hex_minor> device number in hexadecimal represents
> + itself no leading 0x, for example b302.
itself with no leading 0x,
> + 2) /dev/<disk_name> represents the device number of disk
> + 3) /dev/<disk_name><decimal> represents the device 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.
--
~Randy
