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pstore/blk: Fix kerndoc and redundancy on blkdev param 

Remove redundant details of blkdev and fix up resulting kerndoc.

Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Kees Cook <keescook@chromium.org>
This commit is contained in:
Kees Cook 2021-06-15 10:33:00 -07:00
parent 7bb9557b48
commit c811659bb9
2 changed files with 8 additions and 27 deletions
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11
Documentation/admin-guide/pstore-blk.rst
View File

@ -45,15 +45,18 @@ blkdev
The block device to use. Most of the time, it is a partition of block device.
It's required for pstore/blk. It is also used for MTD device.
It accepts the following variants for block device:
When pstore/blk is built as a module, "blkdev" accepts the following variants:
1. <hex_major><hex_minor> device number in hexadecimal represents itself; no
leading 0x, for example b302.
#. /dev/<disk_name> represents the device number of disk
1. /dev/<disk_name> represents the device number of disk
#. /dev/<disk_name><decimal> represents the device number of partition - device
number of disk plus the partition number
#. /dev/<disk_name>p<decimal> - same as the above; this form is used when disk
name of partitioned disk ends with a digit.
When pstore/blk is built into the kernel, "blkdev" accepts the following variants:
#. <hex_major><hex_minor> device number in hexadecimal representation,
with no leading 0x, for example b302.
#. PARTUUID=00112233-4455-6677-8899-AABBCCDDEEFF represents 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,

24
fs/pstore/blk.c
View File

@ -58,29 +58,7 @@ MODULE_PARM_DESC(best_effort, "use best effort to write (i.e. do not require sto
/*
* blkdev - the block device to use for pstore storage
*
* Usually, this will be a partition of a block device.
*
* blkdev accepts the following variants, when built as a module:
* 1) /dev/<disk_name> represents the device number of disk
* 2) /dev/<disk_name><decimal> represents the device number
* of partition - device number of disk plus the partition number
* 3) /dev/<disk_name>p<decimal> - same as the above, that form is
* used when disk name of partitioned disk ends on a digit.
*
* blkdev accepts the following variants when built into the kernel:
* 1) <hex_major><hex_minor> device number in hexadecimal representation,
* with no leading 0x, for example b302.
* 2) 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.
* 3) PARTUUID=<UUID>/PARTNROFF=<int> to select a partition in relation to
* a partition with a known unique id.
* 4) <major>:<minor> major and minor number of the device separated by
* a colon.
* See Documentation/admin-guide/pstore-blk.rst for details.
*/
static char blkdev[80] = CONFIG_PSTORE_BLK_BLKDEV;
module_param_string(blkdev, blkdev, 80, 0400);