From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-io0-f175.google.com ([209.85.223.175]:35934 "EHLO mail-io0-f175.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1037683AbdDUKJt (ORCPT ); Fri, 21 Apr 2017 06:09:49 -0400 Received: by mail-io0-f175.google.com with SMTP id o22so123939091iod.3 for ; Fri, 21 Apr 2017 03:09:48 -0700 (PDT) Received: from ircssh-2.c.rugged-nimbus-611.internal (80.60.198.104.bc.googleusercontent.com. [104.198.60.80]) by smtp.gmail.com with ESMTPSA id f19sm379221itf.19.2017.04.21.03.09.47 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Fri, 21 Apr 2017 03:09:47 -0700 (PDT) Date: Fri, 21 Apr 2017 10:09:46 +0000 From: Sargun Dhillon To: linux-btrfs@vger.kernel.org Subject: [PATCH] btrfs: allow processes with cap_sys_resource to exceed quota Message-ID: <20170421100943.GA2942@ircssh-2.c.rugged-nimbus-611.internal> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Sender: linux-btrfs-owner@vger.kernel.org List-ID: This patch allows processes with CAP_SYS_RESOURCE to exceed the qgroup limit. It's useful for administrative programs, such as log rotation, that may need to temporarily use more disk space in order to free up a greater amount of overall disk space without yielding more disk space to the rest of userland. Signed-off-by: Sargun Dhillon --- fs/btrfs/qgroup.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/fs/btrfs/qgroup.c b/fs/btrfs/qgroup.c index a59801d..b0af39c 100644 --- a/fs/btrfs/qgroup.c +++ b/fs/btrfs/qgroup.c @@ -2349,6 +2349,9 @@ int btrfs_qgroup_inherit(struct btrfs_trans_handle *trans, static bool qgroup_check_limits(const struct btrfs_qgroup *qg, u64 num_bytes) { + if (capable(CAP_SYS_RESOURCE)) + return true; + if ((qg->lim_flags & BTRFS_QGROUP_LIMIT_MAX_RFER) && qg->reserved + (s64)qg->rfer + num_bytes > qg->max_rfer) return false; -- 2.9.3