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    SubjectRe: [PATCH v7 09/18] pstore/blk: Introduce backend for block devices
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    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

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