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btrfs: Convert btrfs to read_folio 

This is a "weak" conversion which converts straight back to using pages.
A full conversion should be performed at some point, hopefully by
someone familiar with the filesystem.

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
This commit is contained in:
Matthew Wilcox (Oracle) 2022-04-29 11:12:16 -04:00
parent a13fe6928a
commit fb12489b0d
7 changed files with 15 additions and 13 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
fs/btrfs/ctree.h
View File

@ -3269,7 +3269,7 @@ void btrfs_split_delalloc_extent(struct inode *inode,
struct extent_state *orig, u64 split);
void btrfs_set_range_writeback(struct btrfs_inode *inode, u64 start, u64 end);
vm_fault_t btrfs_page_mkwrite(struct vm_fault *vmf);
int btrfs_readpage(struct file *file, struct page *page);
int btrfs_read_folio(struct file *file, struct folio *folio);
void btrfs_evict_inode(struct inode *inode);
int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc);
struct inode *btrfs_alloc_inode(struct super_block *sb);

5
fs/btrfs/file.c
View File

@ -1307,11 +1307,12 @@ static int prepare_uptodate_page(struct inode *inode,
struct page *page, u64 pos,
bool force_uptodate)
{
struct folio *folio = page_folio(page);
int ret = 0;
if (((pos & (PAGE_SIZE - 1)) || force_uptodate) &&
!PageUptodate(page)) {
ret = btrfs_readpage(NULL, page);
ret = btrfs_read_folio(NULL, folio);
if (ret)
return ret;
lock_page(page);
@ -1321,7 +1322,7 @@ static int prepare_uptodate_page(struct inode *inode,
}
/*
* Since btrfs_readpage() will unlock the page before it
* Since btrfs_read_folio() will unlock the folio before it
* returns, there is a window where btrfs_releasepage() can be
* called to release the page. Here we check both inode
* mapping and PagePrivate() to make sure the page was not

2
fs/btrfs/free-space-cache.c
View File

@ -465,7 +465,7 @@ static int io_ctl_prepare_pages(struct btrfs_io_ctl *io_ctl, bool uptodate)
io_ctl->pages[i] = page;
if (uptodate && !PageUptodate(page)) {
btrfs_readpage(NULL, page);
btrfs_read_folio(NULL, page_folio(page));
lock_page(page);
if (page->mapping != inode->i_mapping) {
btrfs_err(BTRFS_I(inode)->root->fs_info,

7
fs/btrfs/inode.c
View File

@ -4714,7 +4714,7 @@ again:
goto out_unlock;
if (!PageUptodate(page)) {
ret = btrfs_readpage(NULL, page);
ret = btrfs_read_folio(NULL, page_folio(page));
lock_page(page);
if (page->mapping != mapping) {
unlock_page(page);
@ -8113,8 +8113,9 @@ static int btrfs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
return extent_fiemap(BTRFS_I(inode), fieinfo, start, len);
}
int btrfs_readpage(struct file *file, struct page *page)
int btrfs_read_folio(struct file *file, struct folio *folio)
{
struct page *page = &folio->page;
struct btrfs_inode *inode = BTRFS_I(page->mapping->host);
u64 start = page_offset(page);
u64 end = start + PAGE_SIZE - 1;
@ -11357,7 +11358,7 @@ static const struct file_operations btrfs_dir_file_operations = {
* For now we're avoiding this by dropping bmap.
*/
static const struct address_space_operations btrfs_aops = {
.readpage = btrfs_readpage,
.read_folio = btrfs_read_folio,
.writepage = btrfs_writepage,
.writepages = btrfs_writepages,
.readahead = btrfs_readahead,

2
fs/btrfs/ioctl.c
View File

@ -1359,7 +1359,7 @@ again:
* make it uptodate.
*/
if (!PageUptodate(page)) {
btrfs_readpage(NULL, page);
btrfs_read_folio(NULL, page_folio(page));
lock_page(page);
if (page->mapping != mapping || !PagePrivate(page)) {
unlock_page(page);

8
fs/btrfs/relocation.c
View File

@ -1101,7 +1101,7 @@ int replace_file_extents(struct btrfs_trans_handle *trans,
continue;
/*
* if we are modifying block in fs tree, wait for readpage
* if we are modifying block in fs tree, wait for read_folio
* to complete and drop the extent cache
*/
if (root->root_key.objectid != BTRFS_TREE_RELOC_OBJECTID) {
@ -1563,7 +1563,7 @@ static int invalidate_extent_cache(struct btrfs_root *root,
end = (u64)-1;
}
/* the lock_extent waits for readpage to complete */
/* the lock_extent waits for read_folio to complete */
lock_extent(&BTRFS_I(inode)->io_tree, start, end);
btrfs_drop_extent_cache(BTRFS_I(inode), start, end, 1);
unlock_extent(&BTRFS_I(inode)->io_tree, start, end);
@ -2818,7 +2818,7 @@ static noinline_for_stack int prealloc_file_extent_cluster(
* Subpage can't handle page with DIRTY but without UPTODATE
* bit as it can lead to the following deadlock:
*
* btrfs_readpage()
* btrfs_read_folio()
* | Page already *locked*
* |- btrfs_lock_and_flush_ordered_range()
* |- btrfs_start_ordered_extent()
@ -2972,7 +2972,7 @@ static int relocate_one_page(struct inode *inode, struct file_ra_state *ra,
last_index + 1 - page_index);
if (!PageUptodate(page)) {
btrfs_readpage(NULL, page);
btrfs_read_folio(NULL, page_folio(page));
lock_page(page);
if (!PageUptodate(page)) {
ret = -EIO;

2
fs/btrfs/send.c
View File

@ -4991,7 +4991,7 @@ static int put_file_data(struct send_ctx *sctx, u64 offset, u32 len)
}
if (!PageUptodate(page)) {
btrfs_readpage(NULL, page);
btrfs_read_folio(NULL, page_folio(page));
lock_page(page);
if (!PageUptodate(page)) {
unlock_page(page);