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ubifs: Convert populate_page() to take a folio 

Both callers now have a folio, so pass it in.  This function contains
several assumptions that folios are not large.

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: Zhihao Cheng <chengzhihao1@huawei.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
This commit is contained in:
Matthew Wilcox (Oracle) 2024-01-24 17:52:58 +00:00 committed by Richard Weinberger
parent d06192731c
commit a16bfab367
1 changed files with 21 additions and 20 deletions
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41
fs/ubifs/file.c
View File

@ -590,35 +590,35 @@ out:
/**
* populate_page - copy data nodes into a page for bulk-read.
* @c: UBIFS file-system description object
* @page: page
* @folio: folio
* @bu: bulk-read information
* @n: next zbranch slot
*
* Returns: %0 on success and a negative error code on failure.
*/
static int populate_page(struct ubifs_info *c, struct page *page,
static int populate_page(struct ubifs_info *c, struct folio *folio,
struct bu_info *bu, int *n)
{
int i = 0, nn = *n, offs = bu->zbranch[0].offs, hole = 0, read = 0;
struct inode *inode = page->mapping->host;
struct inode *inode = folio->mapping->host;
loff_t i_size = i_size_read(inode);
unsigned int page_block;
void *addr, *zaddr;
pgoff_t end_index;
dbg_gen("ino %lu, pg %lu, i_size %lld, flags %#lx",
inode->i_ino, page->index, i_size, page->flags);
inode->i_ino, folio->index, i_size, folio->flags);
addr = zaddr = kmap(page);
addr = zaddr = kmap_local_folio(folio, 0);
end_index = (i_size - 1) >> PAGE_SHIFT;
if (!i_size || page->index > end_index) {
if (!i_size || folio->index > end_index) {
hole = 1;
memset(addr, 0, PAGE_SIZE);
addr = folio_zero_tail(folio, 0, addr);
goto out_hole;
}
page_block = page->index << UBIFS_BLOCKS_PER_PAGE_SHIFT;
page_block = folio->index << UBIFS_BLOCKS_PER_PAGE_SHIFT;
while (1) {
int err, len, out_len, dlen;
@ -667,9 +667,13 @@ static int populate_page(struct ubifs_info *c, struct page *page,
break;
addr += UBIFS_BLOCK_SIZE;
page_block += 1;
if (folio_test_highmem(folio) && (offset_in_page(addr) == 0)) {
kunmap_local(addr - UBIFS_BLOCK_SIZE);
addr = kmap_local_folio(folio, i * UBIFS_BLOCK_SIZE);
}
}
if (end_index == page->index) {
if (end_index == folio->index) {
int len = i_size & (PAGE_SIZE - 1);
if (len && len < read)
@ -678,22 +682,19 @@ static int populate_page(struct ubifs_info *c, struct page *page,
out_hole:
if (hole) {
SetPageChecked(page);
folio_set_checked(folio);
dbg_gen("hole");
}
SetPageUptodate(page);
ClearPageError(page);
flush_dcache_page(page);
kunmap(page);
folio_mark_uptodate(folio);
flush_dcache_folio(folio);
kunmap_local(addr);
*n = nn;
return 0;
out_err:
ClearPageUptodate(page);
SetPageError(page);
flush_dcache_page(page);
kunmap(page);
flush_dcache_folio(folio);
kunmap_local(addr);
ubifs_err(c, "bad data node (block %u, inode %lu)",
page_block, inode->i_ino);
return -EINVAL;
@ -761,7 +762,7 @@ static int ubifs_do_bulk_read(struct ubifs_info *c, struct bu_info *bu,
goto out_warn;
}
err = populate_page(c, &folio1->page, bu, &n);
err = populate_page(c, folio1, bu, &n);
if (err)
goto out_warn;
@ -785,7 +786,7 @@ static int ubifs_do_bulk_read(struct ubifs_info *c, struct bu_info *bu,
if (IS_ERR(folio))
break;
if (!folio_test_uptodate(folio))
err = populate_page(c, &folio->page, bu, &n);
err = populate_page(c, folio, bu, &n);
folio_unlock(folio);
folio_put(folio);
if (err)