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ext2: Convert ext2_delete_entry() to use folios

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Save some calls to compound_head() by using the folio API.

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: Jan Kara <jack@suse.cz>
Message-Id: <20230921200746.3303942-7-willy@infradead.org>
This commit is contained in:
Matthew Wilcox (Oracle) 2023-09-21 21:07:44 +01:00 committed by Jan Kara
parent f4b830cfce
commit 7e56bbf15d
1 changed files with 17 additions and 13 deletions
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30
fs/ext2/dir.c
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@ -586,16 +586,20 @@ int ext2_add_link (struct dentry *dentry, struct inode *inode)
*/
int ext2_delete_entry(struct ext2_dir_entry_2 *dir, struct page *page)
{
struct inode *inode = page->mapping->host;
char *kaddr = (char *)((unsigned long)dir & PAGE_MASK);
unsigned from = offset_in_page(dir) & ~(ext2_chunk_size(inode)-1);
unsigned to = offset_in_page(dir) +
ext2_rec_len_from_disk(dir->rec_len);
struct folio *folio = page_folio(page);
struct inode *inode = folio->mapping->host;
size_t from, to;
char *kaddr;
loff_t pos;
ext2_dirent *pde = NULL;
ext2_dirent *de = (ext2_dirent *)(kaddr + from);
ext2_dirent *de, *pde = NULL;
int err;
from = offset_in_folio(folio, dir);
to = from + ext2_rec_len_from_disk(dir->rec_len);
kaddr = (char *)dir - from;
from &= ~(ext2_chunk_size(inode)-1);
de = (ext2_dirent *)(kaddr + from);
while ((char*)de < (char*)dir) {
if (de->rec_len == 0) {
ext2_error(inode->i_sb, __func__,
@ -606,18 +610,18 @@ int ext2_delete_entry(struct ext2_dir_entry_2 *dir, struct page *page)
de = ext2_next_entry(de);
}
if (pde)
from = offset_in_page(pde);
pos = page_offset(page) + from;
lock_page(page);
err = ext2_prepare_chunk(page, pos, to - from);
from = offset_in_folio(folio, pde);
pos = folio_pos(folio) + from;
folio_lock(folio);
err = ext2_prepare_chunk(&folio->page, pos, to - from);
if (err) {
unlock_page(page);
folio_unlock(folio);
return err;
}
if (pde)
pde->rec_len = ext2_rec_len_to_disk(to - from);
dir->inode = 0;
ext2_commit_chunk(page, pos, to - from);
ext2_commit_chunk(&folio->page, pos, to - from);
inode->i_mtime = inode_set_ctime_current(inode);
EXT2_I(inode)->i_flags &= ~EXT2_BTREE_FL;
mark_inode_dirty(inode);