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[2003:dc:6f0e:bd00:230:64ff:fe74:809]) by smtp.gmail.com with ESMTPSA id 4fb4d7f45d1cf-5c226c7c32dsm568410a12.48.2024.08.29.03.57.34 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 29 Aug 2024 03:57:34 -0700 (PDT) From: Max Kellermann To: xiubli@redhat.com, idryomov@gmail.com, ceph-devel@vger.kernel.org Cc: linux-kernel@vger.kernel.org, Max Kellermann Subject: [PATCH] fs/ceph/quota: ignore quota with CAP_SYS_RESOURCE Date: Thu, 29 Aug 2024 12:57:17 +0200 Message-ID: <20240829105717.1163483-1-max.kellermann@ionos.com> X-Mailer: git-send-email 2.45.2 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" CAP_SYS_RESOURCE allows users to "override disk quota limits". Most filesystems have a CAP_SYS_RESOURCE check in all quota check code paths, but Ceph currently does not. This patch implements the feature. Signed-off-by: Max Kellermann --- fs/ceph/quota.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/fs/ceph/quota.c b/fs/ceph/quota.c index 06ee397e0c3a..666315ec74d3 100644 --- a/fs/ceph/quota.c +++ b/fs/ceph/quota.c @@ -429,6 +429,9 @@ bool ceph_quota_is_max_files_exceeded(struct inode *ino= de) =20 WARN_ON(!S_ISDIR(inode->i_mode)); =20 + if (capable(CAP_SYS_RESOURCE)) + return false; + return check_quota_exceeded(inode, QUOTA_CHECK_MAX_FILES_OP, 1); } =20 @@ -451,6 +454,9 @@ bool ceph_quota_is_max_bytes_exceeded(struct inode *ino= de, loff_t newsize) if (newsize <=3D size) return false; =20 + if (capable(CAP_SYS_RESOURCE)) + return false; + return check_quota_exceeded(inode, QUOTA_CHECK_MAX_BYTES_OP, (newsize - s= ize)); } =20 @@ -473,6 +479,9 @@ bool ceph_quota_is_max_bytes_approaching(struct inode *= inode, loff_t newsize) if (newsize <=3D size) return false; =20 + if (capable(CAP_SYS_RESOURCE)) + return false; + return check_quota_exceeded(inode, QUOTA_CHECK_MAX_BYTES_APPROACHING_OP, (newsize - size)); } --=20 2.45.2