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Sun, 01 Nov 2026 15:06:05 -0800 (PST) Received: from localhost.localdomain ([98.148.34.5]) by smtp.gmail.com with ESMTPSA id 5a478bee46e88-36a42662f23sm35600582eec.2.2026.11.01.15.06.04 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 01 Nov 2026 15:06:04 -0800 (PST) From: Hungyu Lin To: Jaegeuk Kim Cc: Chao Yu , linux-f2fs-devel@lists.sourceforge.net, linux-kernel@vger.kernel.org, Hungyu Lin Subject: [PATCH] f2fs: report sub-block project quotas in statfs Date: Sun, 1 Nov 2026 23:05:52 +0000 Message-ID: <20261101230552.55034-1-dennylin0707@gmail.com> X-Mailer: git-send-email 2.43.0 X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit f2fs_statfs_project() converts the selected block quota from bytes to filesystem blocks before checking whether a limit is set. A nonzero limit smaller than one filesystem block therefore becomes zero and skips the project block statistics. For example, on a filesystem with 4 KiB blocks, setquota accepts a 1 KiB project hard limit, but df on the project-inherit directory reports the filesystem-wide capacity and free space instead of zero whole blocks. Quota enforcement still rejects a write that requires another data block. Check the byte limit before converting it to blocks. This distinguishes a sub-block limit from an unlimited quota while retaining the existing rounding and free-space calculations. Fixes: ddc34e328d06 ("f2fs: introduce f2fs_statfs_project") Signed-off-by: Hungyu Lin --- fs/f2fs/super.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c index 1071059f2cc2..f1e98f5fa350 100644 --- a/fs/f2fs/super.c +++ b/fs/f2fs/super.c @@ -2228,11 +2228,11 @@ static int f2fs_statfs_project(struct super_block *sb, limit = min_not_zero(dquot->dq_dqb.dqb_bsoftlimit, dquot->dq_dqb.dqb_bhardlimit); - limit >>= sb->s_blocksize_bits; if (limit) { uint64_t remaining = 0; + limit >>= sb->s_blocksize_bits; curblock = (dquot->dq_dqb.dqb_curspace + dquot->dq_dqb.dqb_rsvspace) >> sb->s_blocksize_bits; if (limit > curblock) -- 2.43.0