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Message-ID: <20240817101146.2347378-1-lizetao1@huawei.com>
Date: Sat, 17 Aug 2024 18:11:45 +0800
From: Li Zetao <lizetao1@...wei.com>
To: <phillip@...ashfs.org.uk>, <willy@...radead.org>
CC: <lizetao1@...wei.com>, <squashfs-devel@...ts.sourceforge.net>,
<linux-kernel@...r.kernel.org>
Subject: [PATCH -next 1/2] squashfs: convert squashfs_copy_cache() to use folio
convert to use folio, so that we can get rid of 'page->index' to
prepare for removal of 'index' field in structure page [1].
[1]: https://lore.kernel.org/all/Zp8fgUSIBGQ1TN0D@casper.infradead.org/
Cc: Matthew Wilcox <willy@...radead.org>
Signed-off-by: Li Zetao <lizetao1@...wei.com>
---
fs/squashfs/file.c | 31 ++++++++++++++++---------------
fs/squashfs/file_cache.c | 2 +-
fs/squashfs/squashfs.h | 2 +-
3 files changed, 18 insertions(+), 17 deletions(-)
diff --git a/fs/squashfs/file.c b/fs/squashfs/file.c
index a8c1e7f9a609..893043ecf973 100644
--- a/fs/squashfs/file.c
+++ b/fs/squashfs/file.c
@@ -378,13 +378,13 @@ void squashfs_fill_page(struct page *page, struct squashfs_cache_entry *buffer,
}
/* Copy data into page cache */
-void squashfs_copy_cache(struct page *page, struct squashfs_cache_entry *buffer,
+void squashfs_copy_cache(struct folio *folio, struct squashfs_cache_entry *buffer,
int bytes, int offset)
{
- struct inode *inode = page->mapping->host;
+ struct inode *inode = folio_inode(folio);
struct squashfs_sb_info *msblk = inode->i_sb->s_fs_info;
int i, mask = (1 << (msblk->block_log - PAGE_SHIFT)) - 1;
- int start_index = page->index & ~mask, end_index = start_index | mask;
+ int start_index = folio->index & ~mask, end_index = start_index | mask;
/*
* Loop copying datablock into pages. As the datablock likely covers
@@ -394,25 +394,26 @@ void squashfs_copy_cache(struct page *page, struct squashfs_cache_entry *buffer,
*/
for (i = start_index; i <= end_index && bytes > 0; i++,
bytes -= PAGE_SIZE, offset += PAGE_SIZE) {
- struct page *push_page;
+ struct folio *push_folio;
int avail = buffer ? min_t(int, bytes, PAGE_SIZE) : 0;
TRACE("bytes %d, i %d, available_bytes %d\n", bytes, i, avail);
- push_page = (i == page->index) ? page :
- grab_cache_page_nowait(page->mapping, i);
-
- if (!push_page)
+ push_folio = (i == folio->index) ? folio :
+ __filemap_get_folio(folio->mapping, i,
+ FGP_LOCK|FGP_CREAT|FGP_NOFS|FGP_NOWAIT,
+ mapping_gfp_mask(folio->mapping));
+ if (IS_ERR(push_folio))
continue;
- if (PageUptodate(push_page))
+ if (folio_test_uptodate(push_folio))
goto skip_page;
- squashfs_fill_page(push_page, buffer, offset, avail);
+ squashfs_fill_page(folio_file_page(push_folio, i), buffer, offset, avail);
skip_page:
- unlock_page(push_page);
- if (i != page->index)
- put_page(push_page);
+ folio_unlock(push_folio);
+ if (i != folio->index)
+ folio_put(push_folio);
}
}
@@ -430,7 +431,7 @@ static int squashfs_readpage_fragment(struct page *page, int expected)
squashfs_i(inode)->fragment_block,
squashfs_i(inode)->fragment_size);
else
- squashfs_copy_cache(page, buffer, expected,
+ squashfs_copy_cache(page_folio(page), buffer, expected,
squashfs_i(inode)->fragment_offset);
squashfs_cache_put(buffer);
@@ -439,7 +440,7 @@ static int squashfs_readpage_fragment(struct page *page, int expected)
static int squashfs_readpage_sparse(struct page *page, int expected)
{
- squashfs_copy_cache(page, NULL, expected, 0);
+ squashfs_copy_cache(page_folio(page), NULL, expected, 0);
return 0;
}
diff --git a/fs/squashfs/file_cache.c b/fs/squashfs/file_cache.c
index 54c17b7c85fd..23d585025882 100644
--- a/fs/squashfs/file_cache.c
+++ b/fs/squashfs/file_cache.c
@@ -29,7 +29,7 @@ int squashfs_readpage_block(struct page *page, u64 block, int bsize, int expecte
ERROR("Unable to read page, block %llx, size %x\n", block,
bsize);
else
- squashfs_copy_cache(page, buffer, expected, 0);
+ squashfs_copy_cache(page_folio(page), buffer, expected, 0);
squashfs_cache_put(buffer);
return res;
diff --git a/fs/squashfs/squashfs.h b/fs/squashfs/squashfs.h
index 5a756e6790b5..a31bd5e9c8bf 100644
--- a/fs/squashfs/squashfs.h
+++ b/fs/squashfs/squashfs.h
@@ -68,7 +68,7 @@ extern __le64 *squashfs_read_fragment_index_table(struct super_block *,
/* file.c */
void squashfs_fill_page(struct page *, struct squashfs_cache_entry *, int, int);
-void squashfs_copy_cache(struct page *, struct squashfs_cache_entry *, int,
+void squashfs_copy_cache(struct folio *, struct squashfs_cache_entry *, int,
int);
/* file_xxx.c */
--
2.34.1
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