From: "wangjianjian (C)" <wangjianjian3@huawei.com>
To: "Matthew Wilcox (Oracle)" <willy@infradead.org>,
"Darrick J. Wong" <djwong@kernel.org>
Cc: "linux-xfs@vger.kernel.org" <linux-xfs@vger.kernel.org>,
"linux-fsdevel@vger.kernel.org" <linux-fsdevel@vger.kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"linux-block@vger.kernel.org" <linux-block@vger.kernel.org>,
Jens Axboe <axboe@kernel.dk>,
Christoph Hellwig <hch@infradead.org>
Subject: RE: [PATCH 02/21] block: Add bio_add_folio()
Date: Wed, 3 Nov 2021 01:25:57 +0000 [thread overview]
Message-ID: <d1d037a13796462a968b5de97c459ecc@huawei.com> (raw)
In-Reply-To: <20211101203929.954622-3-willy@infradead.org>
diff --git a/block/bio.c b/block/bio.c
index 15ab0d6d1c06..0e911c4fb9f2 100644
--- a/block/bio.c
+++ b/block/bio.c
@@ -1033,6 +1033,28 @@ int bio_add_page(struct bio *bio, struct page *page, } EXPORT_SYMBOL(bio_add_page);
+/**
+ * bio_add_folio - Attempt to add part of a folio to a bio.
+ * @bio: BIO to add to.
+ * @folio: Folio to add.
+ * @len: How many bytes from the folio to add.
+ * @off: First byte in this folio to add.
+ *
+ * Filesystems that use folios can call this function instead of
+calling
+ * bio_add_page() for each page in the folio. If @off is bigger than
+ * PAGE_SIZE, this function can create a bio_vec that starts in a page
+ * after the bv_page. BIOs do not support folios that are 4GiB or larger.
+ *
+ * Return: Whether the addition was successful.
+ */
+bool bio_add_folio(struct bio *bio, struct folio *folio, size_t len,
+ size_t off)
+{
+ if (len > UINT_MAX || off > UINT_MAX)
+ return 0;
+ return bio_add_page(bio, &folio->page, len, off) > 0; }
+
Newline.
next prev parent reply other threads:[~2021-11-03 1:26 UTC|newest]
Thread overview: 70+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-11-01 20:39 [PATCH 00/21] iomap/xfs folio patches Matthew Wilcox (Oracle)
2021-11-01 20:39 ` [PATCH 01/21] fs: Remove FS_THP_SUPPORT Matthew Wilcox (Oracle)
2021-11-02 7:12 ` Christoph Hellwig
2021-11-01 20:39 ` [PATCH 02/21] block: Add bio_add_folio() Matthew Wilcox (Oracle)
2021-11-01 20:51 ` Jens Axboe
2021-11-02 14:15 ` Matthew Wilcox
2021-11-02 7:12 ` Christoph Hellwig
2021-11-03 1:25 ` wangjianjian (C) [this message]
2021-11-03 2:22 ` Matthew Wilcox
2021-11-01 20:39 ` [PATCH 03/21] block: Add bio_for_each_folio_all() Matthew Wilcox (Oracle)
2021-11-01 20:51 ` Jens Axboe
2021-11-02 7:13 ` Christoph Hellwig
2021-11-02 20:24 ` Matthew Wilcox
2021-11-02 22:24 ` Darrick J. Wong
2021-11-02 22:33 ` Jens Axboe
2021-11-02 22:37 ` Darrick J. Wong
2021-11-01 20:39 ` [PATCH 04/21] iomap: Convert to_iomap_page to take a folio Matthew Wilcox (Oracle)
2021-11-02 7:13 ` Christoph Hellwig
2021-11-01 20:39 ` [PATCH 05/21] iomap: Convert iomap_page_create " Matthew Wilcox (Oracle)
2021-11-02 7:14 ` Christoph Hellwig
2021-11-01 20:39 ` [PATCH 06/21] iomap: Convert iomap_page_release " Matthew Wilcox (Oracle)
2021-11-01 20:39 ` [PATCH 07/21] iomap: Convert iomap_releasepage to use " Matthew Wilcox (Oracle)
2021-11-02 7:14 ` Christoph Hellwig
2021-11-02 22:39 ` Darrick J. Wong
2021-11-01 20:39 ` [PATCH 08/21] iomap: Add iomap_invalidate_folio Matthew Wilcox (Oracle)
2021-11-02 7:15 ` Christoph Hellwig
2021-11-02 22:36 ` Darrick J. Wong
2021-11-01 20:39 ` [PATCH 09/21] iomap: Pass the iomap_page into iomap_set_range_uptodate Matthew Wilcox (Oracle)
2021-11-02 7:16 ` Christoph Hellwig
2021-11-01 20:39 ` [PATCH 10/21] iomap: Convert bio completions to use folios Matthew Wilcox (Oracle)
2021-11-02 7:17 ` Christoph Hellwig
2021-11-01 20:39 ` [PATCH 11/21] iomap: Use folio offsets instead of page offsets Matthew Wilcox (Oracle)
2021-11-02 7:18 ` Christoph Hellwig
2021-11-01 20:39 ` [PATCH 12/21] iomap: Convert iomap_read_inline_data to take a folio Matthew Wilcox (Oracle)
2021-11-02 7:18 ` Christoph Hellwig
2021-11-01 20:39 ` [PATCH 13/21] iomap: Convert readahead and readpage to use " Matthew Wilcox (Oracle)
2021-11-02 7:20 ` Christoph Hellwig
2021-11-02 12:28 ` Matthew Wilcox
2021-11-01 20:39 ` [PATCH 14/21] iomap: Convert iomap_page_mkwrite " Matthew Wilcox (Oracle)
2021-11-02 7:21 ` Christoph Hellwig
2021-11-01 20:39 ` [PATCH 15/21] iomap: Convert iomap_write_begin and iomap_write_end to folios Matthew Wilcox (Oracle)
2021-11-02 0:25 ` kernel test robot
2021-11-02 7:22 ` Christoph Hellwig
2021-11-02 23:22 ` Darrick J. Wong
2021-11-03 3:15 ` Matthew Wilcox
2021-11-03 12:47 ` Matthew Wilcox
2021-11-01 20:39 ` [PATCH 16/21] iomap: Convert iomap_write_end_inline to take a folio Matthew Wilcox (Oracle)
2021-11-02 7:22 ` Christoph Hellwig
2021-11-01 20:39 ` [PATCH 17/21] iomap,xfs: Convert ->discard_page to ->discard_folio Matthew Wilcox (Oracle)
2021-11-02 7:23 ` Christoph Hellwig
2021-11-03 15:43 ` Darrick J. Wong
2021-11-01 20:39 ` [PATCH 18/21] iomap: Convert iomap_add_to_ioend to take a folio Matthew Wilcox (Oracle)
2021-11-02 7:26 ` Christoph Hellwig
2021-11-02 20:28 ` Matthew Wilcox
2021-11-03 15:54 ` Christoph Hellwig
2021-11-04 3:33 ` Matthew Wilcox
2021-11-04 8:38 ` Christoph Hellwig
2021-11-04 8:40 ` Christoph Hellwig
2021-11-03 16:00 ` Darrick J. Wong
2021-11-04 3:42 ` Matthew Wilcox
2021-11-01 20:39 ` [PATCH 19/21] iomap: Convert iomap_migrate_page to use folios Matthew Wilcox (Oracle)
2021-11-02 7:27 ` Christoph Hellwig
2021-11-03 16:02 ` Darrick J. Wong
2021-11-06 3:44 ` Matthew Wilcox
2021-11-01 20:39 ` [PATCH 20/21] iomap: Support multi-page folios in invalidatepage Matthew Wilcox (Oracle)
2021-11-02 7:27 ` Christoph Hellwig
2021-11-03 16:03 ` Darrick J. Wong
2021-11-01 20:39 ` [PATCH 21/21] xfs: Support multi-page folios Matthew Wilcox (Oracle)
2021-11-02 7:27 ` Christoph Hellwig
2021-11-03 16:07 ` Darrick J. Wong
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