From patchwork Wed Aug 11 19:18:00 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Darrick J. Wong" X-Patchwork-Id: 12431779 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) (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 EA5EB72 for ; Wed, 11 Aug 2021 19:18:00 +0000 (UTC) Received: by mail.kernel.org (Postfix) with ESMTPSA id 734C160EB9; Wed, 11 Aug 2021 19:18:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1628709480; bh=cqWXqkb6ob+gfCb7sASelKlI0tGSx6yt25qoqywUXLg=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=u70QOf/HBbRzHm4laVrflmiaknhZglXEsFVA0TyBOFtZuZ6SpVEThFivpYX4wtpFl zVKr15SRFjjZZdUhu7delLe5EOeIaorcTqFfeoeBRorSa7ybv5G+CSwNrUT/BR5GXL HKgsUqqmq246ON/gJyEBC1XfvqwTC6ZueBARZEP4RHNmKUtYDsZEROSHupn6kgkCNu Uq3bf3JUnV3t9XLbIG2GvUxodaWD2HUf0IhVzFJxZgDu6cOTntuiwn9BDk239g+OV1 B+0ZBSKPVCjlq30XCnFSQlXtC5Q7oCVxHUtIzpi1I3HmWnpCwOJCkTdFbLyz27JO1I ZBjBtQLmabTBg== Date: Wed, 11 Aug 2021 12:18:00 -0700 From: "Darrick J. Wong" To: Christoph Hellwig Cc: Dan Williams , Matthew Wilcox , Andreas Gruenbacher , Shiyang Ruan , linux-xfs@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-btrfs@vger.kernel.org, nvdimm@lists.linux.dev, cluster-devel@redhat.com Subject: [PATCH v2.1 19/30] iomap: switch iomap_bmap to use iomap_iter Message-ID: <20210811191800.GH3601443@magnolia> References: <20210809061244.1196573-1-hch@lst.de> <20210809061244.1196573-20-hch@lst.de> Precedence: bulk X-Mailing-List: nvdimm@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20210809061244.1196573-20-hch@lst.de> From: Christoph Hellwig Rewrite the ->bmap implementation based on iomap_iter. Signed-off-by: Christoph Hellwig [djwong: restructure the loop to make its behavior a little clearer] Reviewed-by: Darrick J. Wong Signed-off-by: Darrick J. Wong Reviewed-by: Dave Chinner --- fs/iomap/fiemap.c | 31 +++++++++++++------------------ 1 file changed, 13 insertions(+), 18 deletions(-) diff --git a/fs/iomap/fiemap.c b/fs/iomap/fiemap.c index acad09a8c188..66cf267c68ae 100644 --- a/fs/iomap/fiemap.c +++ b/fs/iomap/fiemap.c @@ -92,37 +92,32 @@ int iomap_fiemap(struct inode *inode, struct fiemap_extent_info *fi, } EXPORT_SYMBOL_GPL(iomap_fiemap); -static loff_t -iomap_bmap_actor(struct inode *inode, loff_t pos, loff_t length, - void *data, struct iomap *iomap, struct iomap *srcmap) -{ - sector_t *bno = data, addr; - - if (iomap->type == IOMAP_MAPPED) { - addr = (pos - iomap->offset + iomap->addr) >> inode->i_blkbits; - *bno = addr; - } - return 0; -} - /* legacy ->bmap interface. 0 is the error return (!) */ sector_t iomap_bmap(struct address_space *mapping, sector_t bno, const struct iomap_ops *ops) { - struct inode *inode = mapping->host; - loff_t pos = bno << inode->i_blkbits; - unsigned blocksize = i_blocksize(inode); + struct iomap_iter iter = { + .inode = mapping->host, + .pos = (loff_t)bno << mapping->host->i_blkbits, + .len = i_blocksize(mapping->host), + .flags = IOMAP_REPORT, + }; + const unsigned int blkshift = mapping->host->i_blkbits - SECTOR_SHIFT; int ret; if (filemap_write_and_wait(mapping)) return 0; bno = 0; - ret = iomap_apply(inode, pos, blocksize, 0, ops, &bno, - iomap_bmap_actor); + while ((ret = iomap_iter(&iter, ops)) > 0) { + if (iter.iomap.type == IOMAP_MAPPED) + bno = iomap_sector(&iter.iomap, iter.pos) >> blkshift; + /* leave iter.processed unset to abort loop */ + } if (ret) return 0; + return bno; } EXPORT_SYMBOL_GPL(iomap_bmap);