From: Nayna <nayna@linux.vnet.ibm.com>
To: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: linux-efi@vger.kernel.org,
Ard Biesheuvel <ard.biesheuvel@linaro.org>,
Eric Ricther <erichte@linux.ibm.com>,
Nayna Jain <nayna@linux.ibm.com>,
linux-kernel@vger.kernel.org, Mimi Zohar <zohar@linux.ibm.com>,
Claudio Carvalho <cclaudio@linux.ibm.com>,
Matthew Garret <matthew.garret@nebula.com>,
linuxppc-dev@ozlabs.org, Paul Mackerras <paulus@samba.org>,
Jeremy Kerr <jk@ozlabs.org>, Elaine Palmer <erpalmer@us.ibm.com>,
"Oliver O'Halloran" <oohall@gmail.com>,
linux-integrity@vger.kernel.org,
George Wilson <gcwilson@linux.ibm.com>
Subject: Re: [PATCH] sysfs: add BIN_ATTR_WO() macro
Date: Tue, 1 Oct 2019 14:55:49 -0400 [thread overview]
Message-ID: <30330438-bd1d-000f-a9ec-57fd993eb569@linux.vnet.ibm.com> (raw)
In-Reply-To: <20191001181601.GA3705194@kroah.com>
On 10/01/2019 02:16 PM, Greg Kroah-Hartman wrote:
> On Tue, Oct 01, 2019 at 02:08:53PM -0400, Nayna wrote:
>> Hi Greg,
>>
>>
>> On 08/26/2019 11:01 AM, Greg Kroah-Hartman wrote:
>>> This variant was missing from sysfs.h, I guess no one noticed it before.
>>>
>>> Turns out the powerpc secure variable code can use it, so add it to the
>>> tree for it, and potentially others to take advantage of, instead of
>>> open-coding it.
>>>
>>> Reported-by: Nayna Jain <nayna@linux.ibm.com>
>>> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
>>> ---
>>>
>>> I'll queue this up to my tree for 5.4-rc1, but if you want to take this
>>> in your tree earlier, feel free to do so.
>>>
>>> include/linux/sysfs.h | 9 +++++++++
>>> 1 file changed, 9 insertions(+)
>>>
>>> diff --git a/include/linux/sysfs.h b/include/linux/sysfs.h
>>> index 965236795750..5420817ed317 100644
>>> --- a/include/linux/sysfs.h
>>> +++ b/include/linux/sysfs.h
>>> @@ -196,6 +196,12 @@ struct bin_attribute {
>>> .size = _size, \
>>> }
>>> +#define __BIN_ATTR_WO(_name) { \
>>> + .attr = { .name = __stringify(_name), .mode = 0200 }, \
>>> + .store = _name##_store, \
>>> + .size = _size, \
>>> +}
>>> +
>>> #define __BIN_ATTR_RW(_name, _size) \
>>> __BIN_ATTR(_name, 0644, _name##_read, _name##_write, _size)
>>> @@ -208,6 +214,9 @@ struct bin_attribute bin_attr_##_name = __BIN_ATTR(_name, _mode, _read, \
>>> #define BIN_ATTR_RO(_name, _size) \
>>> struct bin_attribute bin_attr_##_name = __BIN_ATTR_RO(_name, _size)
>>> +#define BIN_ATTR_WO(_name, _size) \
>>> +struct bin_attribute bin_attr_##_name = __BIN_ATTR_WO(_name, _size)
>>> +
>>> #define BIN_ATTR_RW(_name, _size) \
>>> struct bin_attribute bin_attr_##_name = __BIN_ATTR_RW(_name, _size)
>> I am sorry. I didn't notice it via inspection but there is a bug in this
>> macro. When I actually try using it, compilation fails. Here's a likely
>> patch:
>>
>> diff --git a/include/linux/sysfs.h b/include/linux/sysfs.h
>> index 5420817ed317..fa7ee503fb76 100644
>> --- a/include/linux/sysfs.h
>> +++ b/include/linux/sysfs.h
>> @@ -196,9 +196,9 @@ struct bin_attribute {
>> .size = _size, \
>> }
>> -#define __BIN_ATTR_WO(_name) { \
>> +#define __BIN_ATTR_WO(_name, _size) { \
>> .attr = { .name = __stringify(_name), .mode = 0200 }, \
>> - .store = _name##_store, \
>> + .write = _name##_write, \
>> .size = _size, \
>> }
>>
> Heh, good catch. Can you send a real patch for this that I can apply to
> give you the proper credit for finding and fixing this?
Sure.. Thanks Greg !!
Thanks & Regards,
- Nayna
next prev parent reply other threads:[~2019-10-01 18:56 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-26 13:23 [PATCH v3 0/4] powerpc: expose secure variables to the kernel and userspace Nayna Jain
2019-08-26 13:23 ` [PATCH v3 1/4] powerpc/powernv: Add OPAL API interface to access secure variable Nayna Jain
2019-08-26 13:23 ` [PATCH v3 2/4] powerpc: expose secure variables to userspace via sysfs Nayna Jain
2019-08-26 14:01 ` Greg Kroah-Hartman
2019-08-26 14:12 ` Nayna
2019-08-26 15:01 ` [PATCH] sysfs: add BIN_ATTR_WO() macro Greg Kroah-Hartman
2019-09-03 3:37 ` Michael Ellerman
2019-09-04 11:36 ` Greg Kroah-Hartman
2019-10-01 18:08 ` Nayna
2019-10-01 18:16 ` Greg Kroah-Hartman
2019-10-01 18:55 ` Nayna [this message]
2019-08-26 14:56 ` [PATCH v3 2/4] powerpc: expose secure variables to userspace via sysfs Greg Kroah-Hartman
2019-08-26 15:46 ` Nayna
2019-08-26 15:57 ` Greg Kroah-Hartman
2019-08-26 13:23 ` [PATCH v3 3/4] x86/efi: move common keyring handler functions to new file Nayna Jain
2019-09-02 11:55 ` Michael Ellerman
2019-09-03 22:51 ` Mimi Zohar
2019-09-05 3:59 ` Michael Ellerman
2019-08-26 13:23 ` [PATCH v3 4/4] powerpc: load firmware trusted keys/hashes into kernel keyring Nayna Jain
2019-09-03 22:54 ` Mimi Zohar
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