From nobody Sun Feb 8 02:20:46 2026 Received: from out30-130.freemail.mail.aliyun.com (out30-130.freemail.mail.aliyun.com [115.124.30.130]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id C6D2F30BF6A for ; Fri, 30 Jan 2026 07:54:29 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=115.124.30.130 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1769759672; cv=none; b=cNSnqVVpH0INkhy2KPNz/ZVAcqtsEasVe2AtCxpG9cCEJH70Gxmy11AXwhr+3uU049EwWGYkw0sVXx7B7G2qpk5iQfem5zozxZkSWZUYcYX0OMZmtHHie3sO24A7d+WxcqYDpwGCA2Enn/pN/ws65uaZw8lT0NclMVuGmthdht8= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1769759672; c=relaxed/simple; bh=zuqNc+XfPY/qQvAIsfjviq1uf8PVAEADSffNjrHWIPY=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=UPOu7KAh9W3DOEFVTWEePlgR/0Kgmd1GCrxQl+xkpwZFOGVL9TM6i0vUh4M7JdGflqZfmJeoncoaNS2R/NyUNv4Lij5AZw97JZ0XLNwEXwg1lL0Hz4lHfoDUVwT2Qkvuuw4tIJh/9CSwOhWWYfxnt3+Rzq3oEvv/dZAx7uZqKS0= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.alibaba.com; spf=pass smtp.mailfrom=linux.alibaba.com; dkim=pass (1024-bit key) header.d=linux.alibaba.com header.i=@linux.alibaba.com header.b=dW4QZBJR; arc=none smtp.client-ip=115.124.30.130 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.alibaba.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.alibaba.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux.alibaba.com header.i=@linux.alibaba.com header.b="dW4QZBJR" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.alibaba.com; s=default; t=1769759667; h=From:To:Subject:Date:Message-ID:MIME-Version; bh=MGY4VwLN5JRVmFEubrf4XAEAuNVa/H718nLHx6PFxNg=; b=dW4QZBJRlUQC06+t/lwkLMFYxQtJ3lGPHY5rYRCGU4nhsyUIk/hz171OkS7Pd2D7XdiqEevabW7ci5cBj4Fx7pFdSvAhQpEMjuyAwZzxqWiKeRq/OUYjhgTqlDkWu5awLPV7BeT8i4/qq3msQq3le/uhAJShZXYr83v8Rmp4ERM= Received: from x31i01179.sqa.na131.tbsite.net(mailfrom:hsiangkao@linux.alibaba.com fp:SMTPD_---0WyA00vO_1769759662 cluster:ay36) by smtp.aliyun-inc.com; Fri, 30 Jan 2026 15:54:26 +0800 From: Gao Xiang To: linux-erofs@lists.ozlabs.org Cc: LKML , oliver.yang@linux.alibaba.com, Gao Xiang Subject: [PATCH v2] erofs: handle end of filesystem properly for file-backed mounts Date: Fri, 30 Jan 2026 15:54:22 +0800 Message-ID: <20260130075422.2043813-1-hsiangkao@linux.alibaba.com> X-Mailer: git-send-email 2.43.5 In-Reply-To: <20260130073421.2012225-1-hsiangkao@linux.alibaba.com> References: <20260130073421.2012225-1-hsiangkao@linux.alibaba.com> 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" I/O requests beyond the end of the filesystem should be zeroed out, similar to loopback devices and that is what we expect. Fixes: ce63cb62d794 ("erofs: support unencoded inodes for fileio") Signed-off-by: Gao Xiang --- v2: - rearrange erofs_fileio_ki_complete() a bit. fs/erofs/fileio.c | 20 ++++++++------------ 1 file changed, 8 insertions(+), 12 deletions(-) diff --git a/fs/erofs/fileio.c b/fs/erofs/fileio.c index c1d0081609dc..43998fe1cce1 100644 --- a/fs/erofs/fileio.c +++ b/fs/erofs/fileio.c @@ -24,21 +24,17 @@ static void erofs_fileio_ki_complete(struct kiocb *iocb= , long ret) container_of(iocb, struct erofs_fileio_rq, iocb); struct folio_iter fi; =20 - if (ret > 0) { - if (ret !=3D rq->bio.bi_iter.bi_size) { - bio_advance(&rq->bio, ret); - zero_fill_bio(&rq->bio); - } - ret =3D 0; + if (ret >=3D 0 && ret !=3D rq->bio.bi_iter.bi_size) { + bio_advance(&rq->bio, ret); + zero_fill_bio(&rq->bio); } - if (rq->bio.bi_end_io) { - if (ret < 0 && !rq->bio.bi_status) - rq->bio.bi_status =3D errno_to_blk_status(ret); - } else { + if (!rq->bio.bi_end_io) { bio_for_each_folio_all(fi, &rq->bio) { DBG_BUGON(folio_test_uptodate(fi.folio)); - erofs_onlinefolio_end(fi.folio, ret, false); + erofs_onlinefolio_end(fi.folio, ret < 0, false); } + } else if (ret < 0 && !rq->bio.bi_status) { + rq->bio.bi_status =3D errno_to_blk_status(ret); } bio_endio(&rq->bio); bio_uninit(&rq->bio); @@ -48,7 +44,7 @@ static void erofs_fileio_ki_complete(struct kiocb *iocb, = long ret) static void erofs_fileio_rq_submit(struct erofs_fileio_rq *rq) { struct iov_iter iter; - int ret; + ssize_t ret; =20 if (!rq) return; --=20 2.43.5