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ext2: Convert ext2_add_link() to use a folio 

Remove five hidden calls to compound_head() and fix a couple of
places that assumed PAGE_SIZE.

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: Jan Kara <jack@suse.cz>
Message-Id: <20230921200746.3303942-5-willy@infradead.org>
This commit is contained in:
Matthew Wilcox (Oracle) 2023-09-21 21:07:42 +01:00 committed by Jan Kara
parent 51706b6fd4
commit 1de0736c3a
1 changed files with 12 additions and 12 deletions
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24
fs/ext2/dir.c
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@ -497,7 +497,7 @@ int ext2_add_link (struct dentry *dentry, struct inode *inode)
unsigned chunk_size = ext2_chunk_size(dir);
unsigned reclen = EXT2_DIR_REC_LEN(namelen);
unsigned short rec_len, name_len;
struct page *page = NULL;
struct folio *folio = NULL;
ext2_dirent * de;
unsigned long npages = dir_pages(dir);
unsigned long n;
@ -506,19 +506,19 @@ int ext2_add_link (struct dentry *dentry, struct inode *inode)
/*
* We take care of directory expansion in the same loop.
* This code plays outside i_size, so it locks the page
* This code plays outside i_size, so it locks the folio
* to protect that region.
*/
for (n = 0; n <= npages; n++) {
char *kaddr = ext2_get_page(dir, n, 0, &page);
char *kaddr = ext2_get_folio(dir, n, 0, &folio);
char *dir_end;
if (IS_ERR(kaddr))
return PTR_ERR(kaddr);
lock_page(page);
folio_lock(folio);
dir_end = kaddr + ext2_last_byte(dir, n);
de = (ext2_dirent *)kaddr;
kaddr += PAGE_SIZE - reclen;
kaddr += folio_size(folio) - reclen;
while ((char *)de <= kaddr) {
if ((char *)de == dir_end) {
/* We hit i_size */
@ -545,15 +545,15 @@ int ext2_add_link (struct dentry *dentry, struct inode *inode)
goto got_it;
de = (ext2_dirent *) ((char *) de + rec_len);
}
unlock_page(page);
ext2_put_page(page, kaddr);
folio_unlock(folio);
folio_release_kmap(folio, kaddr);
}
BUG();
return -EINVAL;
got_it:
pos = page_offset(page) + offset_in_page(de);
err = ext2_prepare_chunk(page, pos, rec_len);
pos = folio_pos(folio) + offset_in_folio(folio, de);
err = ext2_prepare_chunk(&folio->page, pos, rec_len);
if (err)
goto out_unlock;
if (de->inode) {
@ -566,17 +566,17 @@ got_it:
memcpy(de->name, name, namelen);
de->inode = cpu_to_le32(inode->i_ino);
ext2_set_de_type (de, inode);
ext2_commit_chunk(page, pos, rec_len);
ext2_commit_chunk(&folio->page, pos, rec_len);
dir->i_mtime = inode_set_ctime_current(dir);
EXT2_I(dir)->i_flags &= ~EXT2_BTREE_FL;
mark_inode_dirty(dir);
err = ext2_handle_dirsync(dir);
/* OFFSET_CACHE */
out_put:
ext2_put_page(page, de);
folio_release_kmap(folio, de);
return err;
out_unlock:
unlock_page(page);
folio_unlock(folio);
goto out_put;
}