driver-core: Introduce DEVICE_ATTR_ADMIN_{RO,RW}

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A common pattern for using plain DEVICE_ATTR() instead of
DEVICE_ATTR_RO() and DEVICE_ATTR_RW() is for attributes that want to
limit read to only root.  I.e. many users of DEVICE_ATTR() are
specifying 0400 or 0600 for permissions.

Given the expectation that CAP_SYS_ADMIN is needed to access these
sensitive attributes add an explicit helper with the _ADMIN_ identifier
for DEVICE_ATTR_ADMIN_{RO,RW}.

Cc: "Rafael J. Wysocki" <rafael.j.wysocki@intel.com>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Vishal Verma <vishal.l.verma@intel.com>

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Dan Williams 2020-07-20 15:08:07 -07:00 • committed by Vishal Verma

parent 916566ae78

commit 60d360acdd

2 changed files with 11 additions and 0 deletions

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4

include/linux/device.h

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7

include/linux/sysfs.h

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