linux-kernel - Re: [RFC PATCH v5 05/11] fs: add security blob and hooks for block

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Message-ID: <f6bda37a-e6f8-3de9-2bae-25d2296f3424@linux.microsoft.com>
Date:   Tue, 28 Jul 2020 16:55:30 -0700
From:   Deven Bowers <deven.desai@...ux.microsoft.com>
To:     Al Viro <viro@...iv.linux.org.uk>,
        Casey Schaufler <casey@...aufler-ca.com>
Cc:     agk@...hat.com, axboe@...nel.dk, snitzer@...hat.com,
        jmorris@...ei.org, serge@...lyn.com, zohar@...ux.ibm.com,
        paul@...l-moore.com, eparis@...hat.com, jannh@...gle.com,
        dm-devel@...hat.com, linux-integrity@...r.kernel.org,
        linux-security-module@...r.kernel.org,
        linux-fsdevel@...r.kernel.org, linux-block@...r.kernel.org,
        linux-audit@...hat.com, tyhicks@...ux.microsoft.com,
        linux-kernel@...r.kernel.org, corbet@....net, sashal@...nel.org,
        jaskarankhurana@...ux.microsoft.com, mdsakib@...rosoft.com,
        nramas@...ux.microsoft.com, pasha.tatashin@...een.com
Subject: Re: [RFC PATCH v5 05/11] fs: add security blob and hooks for
 block_device



On 7/28/2020 3:40 PM, Al Viro wrote:
> On Tue, Jul 28, 2020 at 03:22:59PM -0700, Casey Schaufler wrote:
> 
>>> +	hlist_for_each_entry(p, &security_hook_heads.bdev_setsecurity, list) {
>>> +		rc = p->hook.bdev_setsecurity(bdev, name, value, size);
>>> +
>>> +		if (rc == -ENOSYS)
>>> +			rc = 0;
>>> +
>>> +		if (rc != 0)
>>
>> Perhaps:
>> 		else if (rc != 0)
>>
>>> +			break;
>>> +	}
>>> +
>>> +	return rc;
> 
> 	hlist_for_each_entry(p, &security_hook_heads.bdev_setsecurity, list) {
> 		rc = p->hook.bdev_setsecurity(bdev, name, value, size);
> 		if (rc && rc != -ENOSYS)
> 			return rc;
> 	}
> 	return 0;
> 
> Easier to reason about that way...
> 

Yeah, this is cleaner. I'll make the change for v6.