linux-kernel - [PATCH v3 0/2] allow blk-zoned ioctls without CAP_SYS

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Date:   Mon, 14 Jun 2021 12:23:19 +0000
From:   Niklas Cassel <Niklas.Cassel@....com>
To:     Jens Axboe <axboe@...nel.dk>, Shaun Tancheff <shaun@...cheff.com>,
        Hannes Reinecke <hare@...e.com>,
        "Martin K. Petersen" <martin.petersen@...cle.com>,
        Damien Le Moal <Damien.LeMoal@....com>
CC:     Damien Le Moal <Damien.LeMoal@....com>,
        Niklas Cassel <Niklas.Cassel@....com>,
        Jens Axboe <axboe@...com>,
        "linux-block@...r.kernel.org" <linux-block@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: [PATCH v3 0/2] allow blk-zoned ioctls without CAP_SYS_ADMIN

From: Niklas Cassel <niklas.cassel@....com>

Allow the following blk-zoned ioctls: BLKREPORTZONE, BLKRESETZONE,
BLKOPENZONE, BLKCLOSEZONE, and BLKFINISHZONE to be performed without
CAP_SYS_ADMIN.

Neither read() nor write() requires CAP_SYS_ADMIN, and considering
the close relationship between read()/write() and these ioctls, there
is no reason to require CAP_SYS_ADMIN for these ioctls either.

Changes since v2:
-Drop the FMODE_READ check from patch 2/2.
Right now it is possible to open() the device with O_WRONLY
and get the zone report from that fd. Therefore adding a
FMODE_READ check on BLKREPORTZONE would break existing applications.
Instead, just remove the existing CAP_SYS_ADMIN check.


Niklas Cassel (2):
  blk-zoned: allow zone management send operations without CAP_SYS_ADMIN
  blk-zoned: allow BLKREPORTZONE without CAP_SYS_ADMIN

 block/blk-zoned.c | 6 ------
 1 file changed, 6 deletions(-)

-- 
2.31.1