[PATCH] nvme-pci: expose active quirks in sysfs

[Chaitanya Kulkarni]

On 10/28/25 10:00, Maurizio Lombardi wrote:
> On Tue Oct 28, 2025 at 5:32 PM CET, Bart Van Assche wrote:
>> On 10/28/25 7:29 AM, Maurizio Lombardi wrote:
>>> Currently, there is no straightforward way for a user to inspect
>>> the quirks value from userspace.
>>> Add a new read-only sysfs attribute "quirks";
>>> reading this file will display the hexadecimal
>>> value of the ctrl->quirks bitmask for the given NVMe device.
>> This patch changes the constants in enum nvme_quirks from
>> kernel-internal constants into an ABI. I'm not sure that's what we
>> want.
> I understand your concern.
> I could respin it to export the names of the active quirks
> rather than the raw bitmask, if there is an interest in having
> this feature.
>
> Maurizio
>
question here: do we need to care about some kind of security before we 
expose controller information that is internal to the driver ? 
CAP_SYS_ADMIN ? -ck