From patchwork Mon Nov 8 04:05:43 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Matthew Wilcox X-Patchwork-Id: 12607789 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 622AEC433F5 for ; Mon, 8 Nov 2021 04:57:15 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 4774360FD8 for ; Mon, 8 Nov 2021 04:57:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235231AbhKHE75 (ORCPT ); Sun, 7 Nov 2021 23:59:57 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52976 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234781AbhKHE75 (ORCPT ); Sun, 7 Nov 2021 23:59:57 -0500 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3BFA4C061570; Sun, 7 Nov 2021 20:57:13 -0800 (PST) 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=EmdbHROb+rTV1VQnL+JR0UeUpFTLI1y3vQA3Rgu/pOc=; b=F9dVP7y8zWosBH3zJxH8nAgUvQ xs/P+Y9uxofqS/yi+WMr6/Fl5bx5gC2umnvtP8I8lWTYyw0Zf6wLs9s8ZCChz4Tm8Q38NRD7TU19T //PG7IIkFgfBUK20t8LaWI6GdndsiuCOBXRQXlup6b+lo1RxcOon1d0poT0E7KIW6n+fY/Wer8hcD FPZLQHKH9NJh+lQmXo2by9Dhy2rOVvb6et6of50DLgapHtQiVhOsBNhuwE7nawSY8z6RiHi6M2F1b hJQOyqsc2yklUH7H9V83b1Zf7ytcYKR4yBs8YPPUgTvHk8pn0K061SnDmopuw9BiwKqxDeE39VKoA MVS45SXg==; Received: from willy by casper.infradead.org with local (Exim 4.94.2 #2 (Red Hat Linux)) id 1mjwdX-008AWq-D1; Mon, 08 Nov 2021 04:52:50 +0000 From: "Matthew Wilcox (Oracle)" To: "Darrick J . Wong " Cc: "Matthew Wilcox (Oracle)" , linux-xfs@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, linux-block@vger.kernel.org, Jens Axboe , Christoph Hellwig , Christoph Hellwig Subject: [PATCH v2 20/28] iomap: Convert iomap_write_begin() and iomap_write_end() to folios Date: Mon, 8 Nov 2021 04:05:43 +0000 Message-Id: <20211108040551.1942823-21-willy@infradead.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20211108040551.1942823-1-willy@infradead.org> References: <20211108040551.1942823-1-willy@infradead.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org These functions still only work in PAGE_SIZE chunks, but there are fewer conversions from tail to head pages as a result of this patch. Signed-off-by: Matthew Wilcox (Oracle) Reviewed-by: Christoph Hellwig Reviewed-by: Darrick J. Wong --- fs/iomap/buffered-io.c | 66 ++++++++++++++++++++---------------------- 1 file changed, 31 insertions(+), 35 deletions(-) diff --git a/fs/iomap/buffered-io.c b/fs/iomap/buffered-io.c index 9c61d12028ca..f4ae200adc4c 100644 --- a/fs/iomap/buffered-io.c +++ b/fs/iomap/buffered-io.c @@ -539,9 +539,8 @@ static int iomap_read_folio_sync(loff_t block_start, struct folio *folio, } static int __iomap_write_begin(const struct iomap_iter *iter, loff_t pos, - unsigned len, struct page *page) + size_t len, struct folio *folio) { - struct folio *folio = page_folio(page); const struct iomap *srcmap = iomap_iter_srcmap(iter); struct iomap_page *iop = iomap_page_create(iter->inode, folio); loff_t block_size = i_blocksize(iter->inode); @@ -582,9 +581,8 @@ static int __iomap_write_begin(const struct iomap_iter *iter, loff_t pos, } static int iomap_write_begin_inline(const struct iomap_iter *iter, - struct page *page) + struct folio *folio) { - struct folio *folio = page_folio(page); int ret; /* needs more work for the tailpacking case; disable for now */ @@ -597,12 +595,12 @@ static int iomap_write_begin_inline(const struct iomap_iter *iter, } static int iomap_write_begin(const struct iomap_iter *iter, loff_t pos, - unsigned len, struct page **pagep) + size_t len, struct folio **foliop) { const struct iomap_page_ops *page_ops = iter->iomap.page_ops; const struct iomap *srcmap = iomap_iter_srcmap(iter); - struct page *page; struct folio *folio; + unsigned fgp = FGP_LOCK | FGP_WRITE | FGP_CREAT | FGP_STABLE | FGP_NOFS; int status = 0; BUG_ON(pos + len > iter->iomap.offset + iter->iomap.length); @@ -618,30 +616,29 @@ static int iomap_write_begin(const struct iomap_iter *iter, loff_t pos, return status; } - page = grab_cache_page_write_begin(iter->inode->i_mapping, - pos >> PAGE_SHIFT, AOP_FLAG_NOFS); - if (!page) { + folio = __filemap_get_folio(iter->inode->i_mapping, pos >> PAGE_SHIFT, + fgp, mapping_gfp_mask(iter->inode->i_mapping)); + if (!folio) { status = -ENOMEM; goto out_no_page; } - folio = page_folio(page); if (srcmap->type == IOMAP_INLINE) - status = iomap_write_begin_inline(iter, page); + status = iomap_write_begin_inline(iter, folio); else if (srcmap->flags & IOMAP_F_BUFFER_HEAD) status = __block_write_begin_int(folio, pos, len, NULL, srcmap); else - status = __iomap_write_begin(iter, pos, len, page); + status = __iomap_write_begin(iter, pos, len, folio); if (unlikely(status)) goto out_unlock; - *pagep = page; + *foliop = folio; return 0; out_unlock: - unlock_page(page); - put_page(page); + folio_unlock(folio); + folio_put(folio); iomap_write_failed(iter->inode, pos, len); out_no_page: @@ -651,11 +648,10 @@ static int iomap_write_begin(const struct iomap_iter *iter, loff_t pos, } static size_t __iomap_write_end(struct inode *inode, loff_t pos, size_t len, - size_t copied, struct page *page) + size_t copied, struct folio *folio) { - struct folio *folio = page_folio(page); struct iomap_page *iop = to_iomap_page(folio); - flush_dcache_page(page); + flush_dcache_folio(folio); /* * The blocks that were entirely written will now be uptodate, so we @@ -668,10 +664,10 @@ static size_t __iomap_write_end(struct inode *inode, loff_t pos, size_t len, * non-uptodate page as a zero-length write, and force the caller to * redo the whole thing. */ - if (unlikely(copied < len && !PageUptodate(page))) + if (unlikely(copied < len && !folio_test_uptodate(folio))) return 0; iomap_set_range_uptodate(folio, iop, offset_in_folio(folio, pos), len); - __set_page_dirty_nobuffers(page); + filemap_dirty_folio(inode->i_mapping, folio); return copied; } @@ -695,7 +691,7 @@ static size_t iomap_write_end_inline(const struct iomap_iter *iter, /* Returns the number of bytes copied. May be 0. Cannot be an errno. */ static size_t iomap_write_end(struct iomap_iter *iter, loff_t pos, size_t len, - size_t copied, struct page *page) + size_t copied, struct folio *folio) { const struct iomap_page_ops *page_ops = iter->iomap.page_ops; const struct iomap *srcmap = iomap_iter_srcmap(iter); @@ -706,9 +702,9 @@ static size_t iomap_write_end(struct iomap_iter *iter, loff_t pos, size_t len, ret = iomap_write_end_inline(iter, page, pos, copied); } else if (srcmap->flags & IOMAP_F_BUFFER_HEAD) { ret = block_write_end(NULL, iter->inode->i_mapping, pos, len, - copied, page, NULL); + copied, &folio->page, NULL); } else { - ret = __iomap_write_end(iter->inode, pos, len, copied, page); + ret = __iomap_write_end(iter->inode, pos, len, copied, folio); } /* @@ -720,13 +716,13 @@ static size_t iomap_write_end(struct iomap_iter *iter, loff_t pos, size_t len, i_size_write(iter->inode, pos + ret); iter->iomap.flags |= IOMAP_F_SIZE_CHANGED; } - unlock_page(page); + folio_unlock(folio); if (old_size < pos) pagecache_isize_extended(iter->inode, old_size, pos); if (page_ops && page_ops->page_done) - page_ops->page_done(iter->inode, pos, ret, page); - put_page(page); + page_ops->page_done(iter->inode, pos, ret, &folio->page); + folio_put(folio); if (ret < len) iomap_write_failed(iter->inode, pos, len); @@ -741,6 +737,7 @@ static loff_t iomap_write_iter(struct iomap_iter *iter, struct iov_iter *i) long status = 0; do { + struct folio *folio; struct page *page; unsigned long offset; /* Offset into pagecache page */ unsigned long bytes; /* Bytes to write to page */ @@ -764,16 +761,17 @@ static loff_t iomap_write_iter(struct iomap_iter *iter, struct iov_iter *i) break; } - status = iomap_write_begin(iter, pos, bytes, &page); + status = iomap_write_begin(iter, pos, bytes, &folio); if (unlikely(status)) break; + page = folio_file_page(folio, pos >> PAGE_SHIFT); if (mapping_writably_mapped(iter->inode->i_mapping)) flush_dcache_page(page); copied = copy_page_from_iter_atomic(page, offset, bytes, i); - status = iomap_write_end(iter, pos, bytes, copied, page); + status = iomap_write_end(iter, pos, bytes, copied, folio); if (unlikely(copied != status)) iov_iter_revert(i, copied - status); @@ -839,13 +837,13 @@ static loff_t iomap_unshare_iter(struct iomap_iter *iter) do { unsigned long offset = offset_in_page(pos); unsigned long bytes = min_t(loff_t, PAGE_SIZE - offset, length); - struct page *page; + struct folio *folio; - status = iomap_write_begin(iter, pos, bytes, &page); + status = iomap_write_begin(iter, pos, bytes, &folio); if (unlikely(status)) return status; - status = iomap_write_end(iter, pos, bytes, bytes, page); + status = iomap_write_end(iter, pos, bytes, bytes, folio); if (WARN_ON_ONCE(status == 0)) return -EIO; @@ -882,21 +880,19 @@ EXPORT_SYMBOL_GPL(iomap_file_unshare); static s64 __iomap_zero_iter(struct iomap_iter *iter, loff_t pos, u64 length) { struct folio *folio; - struct page *page; int status; size_t offset, bytes; - status = iomap_write_begin(iter, pos, length, &page); + status = iomap_write_begin(iter, pos, length, &folio); if (status) return status; - folio = page_folio(page); offset = offset_in_folio(folio, pos); bytes = min_t(u64, folio_size(folio) - offset, length); folio_zero_range(folio, offset, bytes); folio_mark_accessed(folio); - return iomap_write_end(iter, pos, bytes, bytes, page); + return iomap_write_end(iter, pos, bytes, bytes, folio); } static loff_t iomap_zero_iter(struct iomap_iter *iter, bool *did_zero)