From patchwork Tue Sep 24 07:40:43 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 13810431 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (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 6924714A4DC; Tue, 24 Sep 2024 07:41:23 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.137.202.133 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1727163685; cv=none; b=B6EfpMJX4k/rkaCcXWdp+5+DlGx3zVOQT6CvPFrG7E+Z/no0GDgWk6X/hiVbGICpplmIXR+4csKz8BGfA9KMsE5tY+ENG9qzc6BppqQPt8xErtS4gKl+99IOoRQ041PV+OBsa40KD9UeUppOuxRElSpb68BrQ/DC039Q8biOLTI= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1727163685; c=relaxed/simple; bh=QdTfzr7+jI79irwZVd3XFgSAH/bYrYFsD1r4F9MgmAs=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=rh8zcO4vg+BigAggia/MQ0LrG2gep7II0cBI3aV49N+V4t2EOe2sRQL2V7PADIwVaGoXTG4gJErQayJW1GwIH+NTf0dk9H2qYUrZEd1pUGdcI8pQTUHsFooLVblv4+65aQkAGB7rBFBeVG3D2exw32/8aDSKhPIDdlROqQpu0os= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=lst.de; spf=none smtp.mailfrom=bombadil.srs.infradead.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b=v/H5oFxs; arc=none smtp.client-ip=198.137.202.133 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=lst.de Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=bombadil.srs.infradead.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="v/H5oFxs" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20210309; h=Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:Cc:To:From:Sender :Reply-To:Content-Type:Content-ID:Content-Description; bh=up31ahDxat1SKY5qQH6eThzNHFP9FnIFJl22bu3tHJs=; b=v/H5oFxs7cHTlsJgCLvlrVtJcB atas+IqjeBaf/twOz64qfSbWmJoplMlIVkJPevEWZoRn+zy1x3L3OOUj6zWLbmq79UGy1SU/ry7Rt WVjqmcIaLE2MA9iJ8yWHIGpU98VT2xrD1mBVRpGE5SfaCqb0febESTqLEt0J6WWDAqO4GvFRDrgsb aXV4rRv8btVAVdQhYcfA+9384MCq+NzAx5wWhbksrZJrx6Ph74JJS6YQX3f7Zd5inBi2pwbaNaXuu /NqekzIzgCT3O4sivnFf907ry89pIECPuKbbN077kSfEvJ1wXSBgMaMxP70ZTSPAuM2hcl+EB9rJD yVF40JpQ==; Received: from 2a02-8389-2341-5b80-b62d-f525-8e84-d569.cable.dynamic.v6.surfer.at ([2a02:8389:2341:5b80:b62d:f525:8e84:d569] helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.98 #2 (Red Hat Linux)) id 1st0Ak-00000001SI3-2rbg; Tue, 24 Sep 2024 07:41:23 +0000 From: Christoph Hellwig To: Chandan Babu R , Carlos Maiolino , Christian Brauner , "Darrick J. Wong" Cc: linux-xfs@vger.kernel.org, linux-fsdevel@vger.kernel.org Subject: [PATCH 01/10] iomap: factor out a iomap_last_written_block helper Date: Tue, 24 Sep 2024 09:40:43 +0200 Message-ID: <20240924074115.1797231-2-hch@lst.de> X-Mailer: git-send-email 2.45.2 In-Reply-To: <20240924074115.1797231-1-hch@lst.de> References: <20240924074115.1797231-1-hch@lst.de> Precedence: bulk X-Mailing-List: linux-xfs@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html Split out a pice of logic from iomap_file_buffered_write_punch_delalloc that is useful for all iomap_end implementations. Signed-off-by: Christoph Hellwig Reviewed-by: Darrick J. Wong --- fs/iomap/buffered-io.c | 13 ++----------- include/linux/iomap.h | 14 ++++++++++++++ 2 files changed, 16 insertions(+), 11 deletions(-) diff --git a/fs/iomap/buffered-io.c b/fs/iomap/buffered-io.c index 11ea747228aeec..884891ac7a226c 100644 --- a/fs/iomap/buffered-io.c +++ b/fs/iomap/buffered-io.c @@ -1280,7 +1280,6 @@ void iomap_file_buffered_write_punch_delalloc(struct inode *inode, { loff_t start_byte; loff_t end_byte; - unsigned int blocksize = i_blocksize(inode); if (iomap->type != IOMAP_DELALLOC) return; @@ -1289,16 +1288,8 @@ void iomap_file_buffered_write_punch_delalloc(struct inode *inode, if (!(iomap->flags & IOMAP_F_NEW)) return; - /* - * start_byte refers to the first unused block after a short write. If - * nothing was written, round offset down to point at the first block in - * the range. - */ - if (unlikely(!written)) - start_byte = round_down(pos, blocksize); - else - start_byte = round_up(pos + written, blocksize); - end_byte = round_up(pos + length, blocksize); + start_byte = iomap_last_written_block(inode, pos, written); + end_byte = round_up(pos + length, i_blocksize(inode)); /* Nothing to do if we've written the entire delalloc extent */ if (start_byte >= end_byte) diff --git a/include/linux/iomap.h b/include/linux/iomap.h index 4ad12a3c8bae22..62253739dedcbe 100644 --- a/include/linux/iomap.h +++ b/include/linux/iomap.h @@ -256,6 +256,20 @@ static inline const struct iomap *iomap_iter_srcmap(const struct iomap_iter *i) return &i->iomap; } +/* + * Return the file offset for the first unchanged block after a short write. + * + * If nothing was written, round @pos down to point at the first block in + * the range, else round up to include the partially written block. + */ +static inline loff_t iomap_last_written_block(struct inode *inode, loff_t pos, + ssize_t written) +{ + if (unlikely(!written)) + return round_down(pos, i_blocksize(inode)); + return round_up(pos + written, i_blocksize(inode)); +} + ssize_t iomap_file_buffered_write(struct kiocb *iocb, struct iov_iter *from, const struct iomap_ops *ops, void *private); int iomap_read_folio(struct folio *folio, const struct iomap_ops *ops);