From patchwork Mon Jul 19 10:35:04 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 12385347 Received: from casper.infradead.org (casper.infradead.org [90.155.50.34]) (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 A215B29D6 for ; Mon, 19 Jul 2021 10:51:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; 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=DgzDilvzv+eYs/yJD8tN3O1jUGQmFMp9JdknTR7V5sE=; b=iYWnwFknJQyv8XP9p653rpxYZc sDi4ww+jpTB+Vv0aLgVIzeF5TS7wRwoMvS5mb8KzaInMzYjwUfkYCAGUhSiLTrZ1Gxy2Ixtlyiy6p cBOEOMoVAptyk68Of10ZtHIMo1jBuRWjqFMzvWcXpE3rvv3MKXyqSMxbLZzj3mhvB2mX6PNXw9noh YHCqHa9uZFyMdGYcCllsvCQCU6oNqlxDSOmuen8KARZ6yLDuE+W//MjN3IsoYxtANm7yfJU37mBWw iskkitgTBgj39yPwcd3BWJ7LYpqFH3x0dqPjHAYzI/nvsZgK2u6ODIDRCBUPQl28HqdtUOdNCadBo pmO5KaEw==; Received: from [2001:4bb8:193:7660:d2a4:8d57:2e55:21d0] (helo=localhost) by casper.infradead.org with esmtpsa (Exim 4.94.2 #2 (Red Hat Linux)) id 1m5QoF-006lGP-BC; Mon, 19 Jul 2021 10:48:15 +0000 From: Christoph Hellwig To: "Darrick J. Wong" 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 11/27] iomap: switch iomap_file_unshare to use iomap_iter Date: Mon, 19 Jul 2021 12:35:04 +0200 Message-Id: <20210719103520.495450-12-hch@lst.de> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20210719103520.495450-1-hch@lst.de> References: <20210719103520.495450-1-hch@lst.de> Precedence: bulk X-Mailing-List: nvdimm@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by casper.infradead.org. See http://www.infradead.org/rpr.html Switch iomap_file_unshare to use iomap_iter. Signed-off-by: Christoph Hellwig --- fs/iomap/buffered-io.c | 35 ++++++++++++++++++----------------- 1 file changed, 18 insertions(+), 17 deletions(-) diff --git a/fs/iomap/buffered-io.c b/fs/iomap/buffered-io.c index 7195e82d15775e..59781c72c278e5 100644 --- a/fs/iomap/buffered-io.c +++ b/fs/iomap/buffered-io.c @@ -806,10 +806,12 @@ iomap_file_buffered_write(struct kiocb *iocb, struct iov_iter *i, } EXPORT_SYMBOL_GPL(iomap_file_buffered_write); -static loff_t -iomap_unshare_actor(struct inode *inode, loff_t pos, loff_t length, void *data, - struct iomap *iomap, struct iomap *srcmap) +static loff_t iomap_unshare_iter(struct iomap_iter *iter) { + struct iomap *iomap = &iter->iomap; + struct iomap *srcmap = iomap_iter_srcmap(iter); + loff_t pos = iter->pos; + loff_t length = iomap_length(iter); long status = 0; loff_t written = 0; @@ -825,12 +827,12 @@ iomap_unshare_actor(struct inode *inode, loff_t pos, loff_t length, void *data, unsigned long bytes = min_t(loff_t, PAGE_SIZE - offset, length); struct page *page; - status = iomap_write_begin(inode, pos, bytes, + status = iomap_write_begin(iter->inode, pos, bytes, IOMAP_WRITE_F_UNSHARE, &page, iomap, srcmap); if (unlikely(status)) return status; - status = iomap_write_end(inode, pos, bytes, bytes, page, iomap, + status = iomap_write_end(iter->inode, pos, bytes, bytes, page, iomap, srcmap); if (WARN_ON_ONCE(status == 0)) return -EIO; @@ -841,7 +843,7 @@ iomap_unshare_actor(struct inode *inode, loff_t pos, loff_t length, void *data, written += status; length -= status; - balance_dirty_pages_ratelimited(inode->i_mapping); + balance_dirty_pages_ratelimited(iter->inode->i_mapping); } while (length); return written; @@ -851,18 +853,17 @@ int iomap_file_unshare(struct inode *inode, loff_t pos, loff_t len, const struct iomap_ops *ops) { - loff_t ret; - - while (len) { - ret = iomap_apply(inode, pos, len, IOMAP_WRITE, ops, NULL, - iomap_unshare_actor); - if (ret <= 0) - return ret; - pos += ret; - len -= ret; - } + struct iomap_iter iter = { + .inode = inode, + .pos = pos, + .len = len, + .flags = IOMAP_WRITE, + }; + int ret; - return 0; + while ((ret = iomap_iter(&iter, ops)) > 0) + iter.processed = iomap_unshare_iter(&iter); + return ret; } EXPORT_SYMBOL_GPL(iomap_file_unshare);