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ext4: Convert __ext4_block_zero_page_range() to use a folio

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Use folio APIs throughout.  Saves many calls to compound_head().

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: Ritesh Harjani (IBM) <ritesh.list@gmail.com>
Link: https://lore.kernel.org/r/20230324180129.1220691-21-willy@infradead.org
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
This commit is contained in:
Matthew Wilcox 2023-03-24 18:01:20 +00:00 committed by Theodore Ts'o
parent 86324a2162
commit 9d3973de9a
1 changed files with 15 additions and 12 deletions
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27
fs/ext4/inode.c
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@ -3669,23 +3669,26 @@ static int __ext4_block_zero_page_range(handle_t *handle,
ext4_lblk_t iblock;
struct inode *inode = mapping->host;
struct buffer_head *bh;
struct page *page;
struct folio *folio;
int err = 0;
page = find_or_create_page(mapping, from >> PAGE_SHIFT,
mapping_gfp_constraint(mapping, ~__GFP_FS));
if (!page)
folio = __filemap_get_folio(mapping, from >> PAGE_SHIFT,
FGP_LOCK | FGP_ACCESSED | FGP_CREAT,
mapping_gfp_constraint(mapping, ~__GFP_FS));
if (!folio)
return -ENOMEM;
blocksize = inode->i_sb->s_blocksize;
iblock = index << (PAGE_SHIFT - inode->i_sb->s_blocksize_bits);
if (!page_has_buffers(page))
create_empty_buffers(page, blocksize, 0);
bh = folio_buffers(folio);
if (!bh) {
create_empty_buffers(&folio->page, blocksize, 0);
bh = folio_buffers(folio);
}
/* Find the buffer that contains "offset" */
bh = page_buffers(page);
pos = blocksize;
while (offset >= pos) {
bh = bh->b_this_page;
@ -3707,7 +3710,7 @@ static int __ext4_block_zero_page_range(handle_t *handle,
}
/* Ok, it's mapped. Make sure it's up-to-date */
if (PageUptodate(page))
if (folio_test_uptodate(folio))
set_buffer_uptodate(bh);
if (!buffer_uptodate(bh)) {
@ -3717,7 +3720,7 @@ static int __ext4_block_zero_page_range(handle_t *handle,
if (fscrypt_inode_uses_fs_layer_crypto(inode)) {
/* We expect the key to be set. */
BUG_ON(!fscrypt_has_encryption_key(inode));
err = fscrypt_decrypt_pagecache_blocks(page_folio(page),
err = fscrypt_decrypt_pagecache_blocks(folio,
blocksize,
bh_offset(bh));
if (err) {
@ -3733,7 +3736,7 @@ static int __ext4_block_zero_page_range(handle_t *handle,
if (err)
goto unlock;
}
zero_user(page, offset, length);
folio_zero_range(folio, offset, length);
BUFFER_TRACE(bh, "zeroed end of block");
if (ext4_should_journal_data(inode)) {
@ -3747,8 +3750,8 @@ static int __ext4_block_zero_page_range(handle_t *handle,
}
unlock:
unlock_page(page);
put_page(page);
folio_unlock(folio);
folio_put(folio);
return err;
}