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virtiofsd: Allow addition or removal of capabilities

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Allow capabilities to be added or removed from the allowed set for the
daemon; e.g.

default:
CapPrm: 00000000880000df
CapEff: 00000000880000df

-o modcaps=+sys_admin

CapPrm: 00000000882000df
CapEff: 00000000882000df

-o modcaps=+sys_admin:-chown

CapPrm: 00000000882000de
CapEff: 00000000882000de

Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Message-Id: <20200629115420.98443-4-dgilbert@redhat.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
This commit is contained in:
Dr. David Alan Gilbert 2020-06-29 12:54:20 +01:00
parent 55b22a60cc
commit 3005c099ef
3 changed files with 58 additions and 2 deletions
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5
docs/tools/virtiofsd.rst
View file

@ -54,6 +54,11 @@ Options
* flock|no_flock -
Enable/disable flock. The default is ``no_flock``.
* modcaps=CAPLIST
Modify the list of capabilities allowed; CAPLIST is a colon separated
list of capabilities, each preceded by either + or -, e.g.
''+sys_admin:-chown''.
* log_level=LEVEL -
Print only log messages matching LEVEL or more severe. LEVEL is one of
``err``, ``warn``, ``info``, or ``debug``. The default is ``info``.