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Message-Id: <20231016201114.1928083-23-willy@infradead.org>
Date: Mon, 16 Oct 2023 21:11:09 +0100
From: "Matthew Wilcox (Oracle)" <willy@...radead.org>
To: Andrew Morton <akpm@...ux-foundation.org>
Cc: "Matthew Wilcox (Oracle)" <willy@...radead.org>,
linux-fsdevel@...r.kernel.org, gfs2@...ts.linux.dev,
linux-nilfs@...r.kernel.org, linux-ntfs-dev@...ts.sourceforge.net,
ntfs3@...ts.linux.dev, ocfs2-devel@...ts.linux.dev,
reiserfs-devel@...r.kernel.org, linux-ext4@...r.kernel.org,
Pankaj Raghav <p.raghav@...sung.com>
Subject: [PATCH v2 22/27] reiserfs: Convert writepage to use a folio
Convert the incoming page to a folio and then use it throughout the
writeback path. This definitely isn't enough to support large folios, but
I don't expect reiserfs to gain support for those before it is removed.
Signed-off-by: Matthew Wilcox (Oracle) <willy@...radead.org>
---
fs/reiserfs/inode.c | 80 ++++++++++++++++++++++-----------------------
1 file changed, 40 insertions(+), 40 deletions(-)
diff --git a/fs/reiserfs/inode.c b/fs/reiserfs/inode.c
index c8572346556f..d7df556220a4 100644
--- a/fs/reiserfs/inode.c
+++ b/fs/reiserfs/inode.c
@@ -2503,10 +2503,10 @@ static int map_block_for_writepage(struct inode *inode,
* start/recovery path as __block_write_full_folio, along with special
* code to handle reiserfs tails.
*/
-static int reiserfs_write_full_page(struct page *page,
+static int reiserfs_write_full_folio(struct folio *folio,
struct writeback_control *wbc)
{
- struct inode *inode = page->mapping->host;
+ struct inode *inode = folio->mapping->host;
unsigned long end_index = inode->i_size >> PAGE_SHIFT;
int error = 0;
unsigned long block;
@@ -2514,7 +2514,7 @@ static int reiserfs_write_full_page(struct page *page,
struct buffer_head *head, *bh;
int partial = 0;
int nr = 0;
- int checked = PageChecked(page);
+ int checked = folio_test_checked(folio);
struct reiserfs_transaction_handle th;
struct super_block *s = inode->i_sb;
int bh_per_page = PAGE_SIZE / s->s_blocksize;
@@ -2522,47 +2522,46 @@ static int reiserfs_write_full_page(struct page *page,
/* no logging allowed when nonblocking or from PF_MEMALLOC */
if (checked && (current->flags & PF_MEMALLOC)) {
- redirty_page_for_writepage(wbc, page);
- unlock_page(page);
+ folio_redirty_for_writepage(wbc, folio);
+ folio_unlock(folio);
return 0;
}
/*
- * The page dirty bit is cleared before writepage is called, which
+ * The folio dirty bit is cleared before writepage is called, which
* means we have to tell create_empty_buffers to make dirty buffers
- * The page really should be up to date at this point, so tossing
+ * The folio really should be up to date at this point, so tossing
* in the BH_Uptodate is just a sanity check.
*/
- if (!page_has_buffers(page)) {
- create_empty_buffers(page, s->s_blocksize,
+ head = folio_buffers(folio);
+ if (!head)
+ head = folio_create_empty_buffers(folio, s->s_blocksize,
(1 << BH_Dirty) | (1 << BH_Uptodate));
- }
- head = page_buffers(page);
/*
- * last page in the file, zero out any contents past the
+ * last folio in the file, zero out any contents past the
* last byte in the file
*/
- if (page->index >= end_index) {
+ if (folio->index >= end_index) {
unsigned last_offset;
last_offset = inode->i_size & (PAGE_SIZE - 1);
- /* no file contents in this page */
- if (page->index >= end_index + 1 || !last_offset) {
- unlock_page(page);
+ /* no file contents in this folio */
+ if (folio->index >= end_index + 1 || !last_offset) {
+ folio_unlock(folio);
return 0;
}
- zero_user_segment(page, last_offset, PAGE_SIZE);
+ folio_zero_segment(folio, last_offset, folio_size(folio));
}
bh = head;
- block = page->index << (PAGE_SHIFT - s->s_blocksize_bits);
+ block = folio->index << (PAGE_SHIFT - s->s_blocksize_bits);
last_block = (i_size_read(inode) - 1) >> inode->i_blkbits;
/* first map all the buffers, logging any direct items we find */
do {
if (block > last_block) {
/*
* This can happen when the block size is less than
- * the page size. The corresponding bytes in the page
+ * the folio size. The corresponding bytes in the folio
* were zero filled above
*/
clear_buffer_dirty(bh);
@@ -2589,7 +2588,7 @@ static int reiserfs_write_full_page(struct page *page,
* blocks we're going to log
*/
if (checked) {
- ClearPageChecked(page);
+ folio_clear_checked(folio);
reiserfs_write_lock(s);
error = journal_begin(&th, s, bh_per_page + 1);
if (error) {
@@ -2598,7 +2597,7 @@ static int reiserfs_write_full_page(struct page *page,
}
reiserfs_update_inode_transaction(inode);
}
- /* now go through and lock any dirty buffers on the page */
+ /* now go through and lock any dirty buffers on the folio */
do {
get_bh(bh);
if (!buffer_mapped(bh))
@@ -2619,7 +2618,7 @@ static int reiserfs_write_full_page(struct page *page,
lock_buffer(bh);
} else {
if (!trylock_buffer(bh)) {
- redirty_page_for_writepage(wbc, page);
+ folio_redirty_for_writepage(wbc, folio);
continue;
}
}
@@ -2636,13 +2635,13 @@ static int reiserfs_write_full_page(struct page *page,
if (error)
goto fail;
}
- BUG_ON(PageWriteback(page));
- set_page_writeback(page);
- unlock_page(page);
+ BUG_ON(folio_test_writeback(folio));
+ folio_start_writeback(folio);
+ folio_unlock(folio);
/*
- * since any buffer might be the only dirty buffer on the page,
- * the first submit_bh can bring the page out of writeback.
+ * since any buffer might be the only dirty buffer on the folio,
+ * the first submit_bh can bring the folio out of writeback.
* be careful with the buffers.
*/
do {
@@ -2659,10 +2658,10 @@ static int reiserfs_write_full_page(struct page *page,
done:
if (nr == 0) {
/*
- * if this page only had a direct item, it is very possible for
+ * if this folio only had a direct item, it is very possible for
* no io to be required without there being an error. Or,
* someone else could have locked them and sent them down the
- * pipe without locking the page
+ * pipe without locking the folio
*/
bh = head;
do {
@@ -2673,18 +2672,18 @@ static int reiserfs_write_full_page(struct page *page,
bh = bh->b_this_page;
} while (bh != head);
if (!partial)
- SetPageUptodate(page);
- end_page_writeback(page);
+ folio_mark_uptodate(folio);
+ folio_end_writeback(folio);
}
return error;
fail:
/*
* catches various errors, we need to make sure any valid dirty blocks
- * get to the media. The page is currently locked and not marked for
+ * get to the media. The folio is currently locked and not marked for
* writeback
*/
- ClearPageUptodate(page);
+ folio_clear_uptodate(folio);
bh = head;
do {
get_bh(bh);
@@ -2694,16 +2693,16 @@ static int reiserfs_write_full_page(struct page *page,
} else {
/*
* clear any dirty bits that might have come from
- * getting attached to a dirty page
+ * getting attached to a dirty folio
*/
clear_buffer_dirty(bh);
}
bh = bh->b_this_page;
} while (bh != head);
- SetPageError(page);
- BUG_ON(PageWriteback(page));
- set_page_writeback(page);
- unlock_page(page);
+ folio_set_error(folio);
+ BUG_ON(folio_test_writeback(folio));
+ folio_start_writeback(folio);
+ folio_unlock(folio);
do {
struct buffer_head *next = bh->b_this_page;
if (buffer_async_write(bh)) {
@@ -2724,9 +2723,10 @@ static int reiserfs_read_folio(struct file *f, struct folio *folio)
static int reiserfs_writepage(struct page *page, struct writeback_control *wbc)
{
- struct inode *inode = page->mapping->host;
+ struct folio *folio = page_folio(page);
+ struct inode *inode = folio->mapping->host;
reiserfs_wait_on_write_block(inode->i_sb);
- return reiserfs_write_full_page(page, wbc);
+ return reiserfs_write_full_folio(folio, wbc);
}
static void reiserfs_truncate_failed_write(struct inode *inode)
--
2.40.1
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