netdev - Re: [PATCH] ima: Calculate digest in ima_inode

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Message-ID: <f9ccc9be6cc084e9cab6cd75e87735492d120002.camel@linux.ibm.com>
Date:   Fri, 11 Feb 2022 07:40:53 -0500
From:   Mimi Zohar <zohar@...ux.ibm.com>
To:     Roberto Sassu <roberto.sassu@...wei.com>, shuah@...nel.org,
        ast@...nel.org, daniel@...earbox.net, andrii@...nel.org,
        kpsingh@...nel.org
Cc:     linux-integrity@...r.kernel.org,
        linux-security-module@...r.kernel.org,
        linux-kselftest@...r.kernel.org, netdev@...r.kernel.org,
        bpf@...r.kernel.org, linux-kernel@...r.kernel.org,
        Florent Revest <revest@...gle.com>
Subject: Re: [PATCH] ima: Calculate digest in ima_inode_hash() if not
 available

Hi Roberto,

On Fri, 2022-02-11 at 11:48 +0100, Roberto Sassu wrote:
> __ima_inode_hash() checks if a digest has been already calculated by
> looking for the integrity_iint_cache structure associated to the passed
> inode.
> 
> Users of ima_file_hash() and ima_inode_hash() (e.g. eBPF) might be
> interested in obtaining the information without having to setup an IMA
> policy so that the digest is always available at the time they call one of
> those functions.

Things obviously changed, but the original use case for this interface,
as I recall, was a quick way to determine if a file had been accessed
on the system.

-- 
thanks,

Mimi