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From: Hannes Reinecke <hare@suse.de>
To: Matthew Wilcox <willy@infradead.org>
Cc: Luis Chamberlain <mcgrof@kernel.org>,
	Christoph Hellwig <hch@lst.de>, Jens Axboe <axboe@kernel.dk>,
	Pankaj Raghav <p.raghav@samsung.com>,
	linux-block@vger.kernel.org, linux-fsdevel@vger.kernel.org,
	Hannes Reinecke <hare@suse.de>
Subject: [PATCH 03/18] block/buffer_head: introduce block_{index_to_sector,sector_to_index}
Date: Mon, 18 Sep 2023 13:04:55 +0200	[thread overview]
Message-ID: <20230918110510.66470-4-hare@suse.de> (raw)
In-Reply-To: <20230918110510.66470-1-hare@suse.de>

Introduce accessor functions block_index_to_sector() and block_sector_to_index()
to convert the page index into the corresponding sector and vice versa.

Signed-off-by: Hannes Reinecke <hare@suse.de>
---
 include/linux/buffer_head.h | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/include/linux/buffer_head.h b/include/linux/buffer_head.h
index 4ede47649a81..55a3032f8375 100644
--- a/include/linux/buffer_head.h
+++ b/include/linux/buffer_head.h
@@ -277,6 +277,7 @@ int generic_cont_expand_simple(struct inode *inode, loff_t size);
 void block_commit_write(struct page *page, unsigned int from, unsigned int to);
 int block_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf,
 				get_block_t get_block);
+
 sector_t generic_block_bmap(struct address_space *, sector_t, get_block_t *);
 int block_truncate_page(struct address_space *, loff_t, get_block_t *);
 
@@ -449,6 +450,22 @@ __bread(struct block_device *bdev, sector_t block, unsigned size)
 
 bool block_dirty_folio(struct address_space *mapping, struct folio *folio);
 
+static inline sector_t block_index_to_sector(pgoff_t index, unsigned int blkbits)
+{
+	if (PAGE_SHIFT < blkbits)
+		return (sector_t)index >> (blkbits - PAGE_SHIFT);
+	else
+		return (sector_t)index << (PAGE_SHIFT - blkbits);
+}
+
+static inline pgoff_t block_sector_to_index(sector_t block, unsigned int blkbits)
+{
+	if (PAGE_SHIFT < blkbits)
+		return (pgoff_t)block << (blkbits - PAGE_SHIFT);
+	else
+		return (pgoff_t)block >> (PAGE_SHIFT - blkbits);
+}
+
 #ifdef CONFIG_BUFFER_HEAD
 
 void buffer_init(void);
-- 
2.35.3


  parent reply	other threads:[~2023-09-18 11:06 UTC|newest]

Thread overview: 38+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-09-18 11:04 [RFC PATCH 00/18] block: update buffer_head for Large-block I/O Hannes Reinecke
2023-09-18 11:04 ` [PATCH 01/18] mm/readahead: rework loop in page_cache_ra_unbounded() Hannes Reinecke
     [not found]   ` <CGME20230920115645eucas1p1c8ed9bf515c4532b3e6995f8078a863b@eucas1p1.samsung.com>
2023-09-20 11:56     ` Pankaj Raghav
2023-09-20 14:13       ` Hannes Reinecke
2023-09-21  9:06         ` Pankaj Raghav
2023-09-20 14:18       ` Matthew Wilcox
2023-09-18 11:04 ` [PATCH 02/18] fs/mpage: use blocks_per_folio instead of blocks_per_page Hannes Reinecke
2023-09-18 13:15   ` Matthew Wilcox
2023-09-18 17:45     ` Hannes Reinecke
2023-09-18 11:04 ` Hannes Reinecke [this message]
2023-09-18 16:36   ` [PATCH 03/18] block/buffer_head: introduce block_{index_to_sector,sector_to_index} Matthew Wilcox
2023-09-18 17:42     ` Hannes Reinecke
2023-09-18 21:01       ` Matthew Wilcox
2023-09-18 11:04 ` [PATCH 04/18] fs/buffer.c: use accessor function to translate page index to sectors Hannes Reinecke
2023-10-20 19:37   ` Matthew Wilcox
2023-10-21  5:08     ` Matthew Wilcox
2023-10-23  5:03     ` Hannes Reinecke
2023-09-18 11:04 ` [PATCH 05/18] fs/mpage: " Hannes Reinecke
2023-09-18 11:04 ` [PATCH 06/18] fs: Allow fine-grained control of folio sizes Hannes Reinecke
2023-09-18 11:04 ` [PATCH 07/18] mm/filemap: allocate folios with mapping order preference Hannes Reinecke
2023-09-18 13:41   ` Matthew Wilcox
2023-09-18 17:34     ` Hannes Reinecke
2023-09-18 11:05 ` [PATCH 08/18] mm/readahead: " Hannes Reinecke
2023-09-18 13:11   ` kernel test robot
2023-09-18 20:46   ` kernel test robot
2023-09-18 11:05 ` [PATCH 09/18] fs/buffer: use mapping order in grow_dev_page() Hannes Reinecke
2023-09-18 14:00   ` Matthew Wilcox
2023-09-18 17:38     ` Hannes Reinecke
2023-09-18 11:05 ` [PATCH 10/18] block/bdev: lift restrictions on supported blocksize Hannes Reinecke
2023-09-18 11:05 ` [PATCH 11/18] block/bdev: enable large folio support for large logical block sizes Hannes Reinecke
2023-09-18 11:05 ` [PATCH 12/18] brd: convert to folios Hannes Reinecke
2023-09-18 11:05 ` [PATCH 13/18] brd: abstract page_size conventions Hannes Reinecke
2023-09-18 11:05 ` [PATCH 14/18] brd: use memcpy_{to,from}_folio() Hannes Reinecke
2023-09-18 11:05 ` [PATCH 15/18] brd: make sector size configurable Hannes Reinecke
2023-09-18 11:05 ` [PATCH 16/18] brd: make logical " Hannes Reinecke
2023-09-18 11:05 ` [PATCH 17/18] xfs: remove check for block sizes smaller than PAGE_SIZE Hannes Reinecke
2023-09-20  2:13   ` Dave Chinner
2023-09-18 11:05 ` [PATCH 18/18] nvme: enable logical block size > PAGE_SIZE Hannes Reinecke

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