linux-kernel - [PATCH v3 0/2] soc: qcom: rmtfs-mem: Support non-root rmtfs daemons

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Message-Id: <20190103000213.230652-1-evgreen@chromium.org>
Date:   Wed,  2 Jan 2019 16:02:11 -0800
From:   Evan Green <evgreen@...omium.org>
To:     Andy Gross <andy.gross@...aro.org>
Cc:     Bjorn Andersson <bjorn.andersson@...aro.org>,
        Brian Norris <briannorris@...omium.org>,
        Ben Chan <benchan@...omium.org>,
        Evan Green <evgreen@...omium.org>,
        linux-arm-msm@...r.kernel.org,
        David Brown <david.brown@...aro.org>,
        linux-kernel@...r.kernel.org
Subject: [PATCH v3 0/2] soc: qcom: rmtfs-mem: Support non-root rmtfs daemons

This series contains minor fixes needed to better support running an
rmtfs daemon from an unprivileged process:
 - Enable uevents on the child character device by adding a struct
class to the parent. I needed these so that I could change the
ownership of /dev/qcom_rmtfs_mem1, and drove myself crazy trying to
understand why my udev rules never fired.
 - Enable access to phys_addr and size sysfs attributes. The daemon
needs to read these, and they don't really contain anything sensitive,
so expose them.

I still need CAP_NET_ADMIN to be able to bind to the right qrtr port,
but at least with these changes I can run as a different user, and drop
all other privileges.

Changes in v3:
- Removed spurious whitespace changes (Brian, Bjorn)

Changes in v2:
- Moved class registration/deregistration into init/exit routines (Brian)

Evan Green (2):
  soc: qcom: rmtfs-mem: Add class to enable uevents
  soc: qcom: rmtfs-mem: Make sysfs attributes world-readable

 drivers/soc/qcom/rmtfs_mem.c | 32 ++++++++++++++++++++++++--------
 1 file changed, 24 insertions(+), 8 deletions(-)

-- 
2.18.1