netdev - Re: [PATCH v7 01/18] landlock: rename access mask

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Date:   Fri, 9 Sep 2022 13:42:47 +0300
From:   "Konstantin Meskhidze (A)" <konstantin.meskhidze@...wei.com>
To:     Mickaël Salaün <mic@...ikod.net>
CC:     <willemdebruijn.kernel@...il.com>, <gnoack3000@...il.com>,
        <linux-security-module@...r.kernel.org>, <netdev@...r.kernel.org>,
        <netfilter-devel@...r.kernel.org>, <anton.sirazetdinov@...wei.com>
Subject: Re: [PATCH v7 01/18] landlock: rename access mask



9/6/2022 11:06 AM, Mickaël Salaün пишет:
> You can improve the subject with "landlock: Make ruleset's access masks
> more generic".
> Please capitalize all subjects this way.
> 
> On 29/08/2022 19:03, Konstantin Meskhidze wrote:
>> To support network type rules, this modification renames ruleset's
>> access masks and modifies it's type to access_masks_t. This patch
>> adds filesystem helper functions to add and get filesystem mask.
>> 
>> Signed-off-by: Konstantin Meskhidze <konstantin.meskhidze@...wei.com>
>> ---
>> 
>> Changes since v6:
>> * Adds a new access_masks_t for struct ruleset.
>> * Renames landlock_set_fs_access_mask() to landlock_add_fs_access_mask()
>>    because it OR values.
>> * Makes landlock_add_fs_access_mask() more resilient incorrect values.
>> * Refactors landlock_get_fs_access_mask().
>> 
>> Changes since v5:
>> * Changes access_mask_t to u32.
>> * Formats code with clang-format-14.
>> 
>> Changes since v4:
>> * Deletes struct landlock_access_mask.
>> 
>> Changes since v3:
>> * Splits commit.
>> * Adds get_mask, set_mask helpers for filesystem.
>> * Adds new struct landlock_access_mask.
>> 
>> ---
>>   security/landlock/fs.c       |  7 ++++---
>>   security/landlock/limits.h   |  1 +
>>   security/landlock/ruleset.c  | 17 +++++++++--------
>>   security/landlock/ruleset.h  | 37 ++++++++++++++++++++++++++++++++----
>>   security/landlock/syscalls.c |  7 ++++---
>>   5 files changed, 51 insertions(+), 18 deletions(-)
> 
> [...]
> 
>> @@ -177,4 +182,28 @@ static inline void landlock_get_ruleset(struct landlock_ruleset *const ruleset)
>>   		refcount_inc(&ruleset->usage);
>>   }
>> 
>> +/* A helper function to set a filesystem mask. */
>> +static inline void
>> +landlock_add_fs_access_mask(struct landlock_ruleset *const ruleset,
>> +			    const access_mask_t fs_access_mask,
>> +			    const u16 layer_level)
>> +{
>> +	access_mask_t fs_mask = fs_access_mask & LANDLOCK_MASK_ACCESS_FS;
>> +
>> +	/* Should already be checked in sys_landlock_create_ruleset(). */
>> +	WARN_ON_ONCE(fs_access_mask != fs_mask);
>> +	// TODO: Add tests to check "|=" and not "="
> 
> Please add tests as I explained in a previous email.

   Do you mean to add this test into TEST_F_FORK(layout1, inval) in 
fs_test.c ???
> .