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fs: convert writepage_t callback to pass a folio

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Patch series "Convert writepage_t to use a folio".

More folioisation.  I split out the mpage work from everything else
because it completely dominated the patch, but some implementations I just
converted outright.


This patch (of 2):

We always write back an entire folio, but that's currently passed as the
head page.  Convert all filesystems that use write_cache_pages() to expect
a folio instead of a page.

Link: https://lkml.kernel.org/r/20230126201255.1681189-1-willy@infradead.org
Link: https://lkml.kernel.org/r/20230126201255.1681189-2-willy@infradead.org
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Matthew Wilcox (Oracle) 2023-01-26 20:12:54 +00:00 committed by Andrew Morton
parent 00cdf76012
commit d585bdbeb7
11 changed files with 44 additions and 44 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

8
fs/cifs/file.c
View file

@ -2675,14 +2675,14 @@ wdata_send_pages(struct cifs_writedata *wdata, unsigned int nr_pages,
static int
cifs_writepage_locked(struct page *page, struct writeback_control *wbc);
static int cifs_write_one_page(struct page *page, struct writeback_control *wbc,
void *data)
static int cifs_write_one_page(struct folio *folio,
struct writeback_control *wbc, void *data)
{
struct address_space *mapping = data;
int ret;
ret = cifs_writepage_locked(page, wbc);
unlock_page(page);
ret = cifs_writepage_locked(&folio->page, wbc);
folio_unlock(folio);
mapping_set_error(mapping, ret);
return ret;
}

4
fs/ext4/inode.c
View file

@ -2711,10 +2711,10 @@ static int mpage_prepare_extent_to_map(struct mpage_da_data *mpd)
return err;
}
static int ext4_writepage_cb(struct page *page, struct writeback_control *wbc,
static int ext4_writepage_cb(struct folio *folio, struct writeback_control *wbc,
void *data)
{
return ext4_writepage(page, wbc);
return ext4_writepage(&folio->page, wbc);
}
static int ext4_do_writepages(struct mpage_da_data *mpd)

6
fs/ext4/super.c
View file

@ -482,7 +482,7 @@ static void ext4_journal_commit_callback(journal_t *journal, transaction_t *txn)
*
* However, we may have to redirty a page (see below.)
*/
static int ext4_journalled_writepage_callback(struct page *page,
static int ext4_journalled_writepage_callback(struct folio *folio,
struct writeback_control *wbc,
void *data)
{
@ -490,7 +490,7 @@ static int ext4_journalled_writepage_callback(struct page *page,
struct buffer_head *bh, *head;
struct journal_head *jh;
bh = head = page_buffers(page);
bh = head = folio_buffers(folio);
do {
/*
* We have to redirty a page in these cases:
@ -509,7 +509,7 @@ static int ext4_journalled_writepage_callback(struct page *page,
if (buffer_dirty(bh) ||
(jh && (jh->b_transaction != transaction ||
jh->b_next_transaction))) {
redirty_page_for_writepage(wbc, page);
folio_redirty_for_writepage(wbc, folio);
goto out;
}
} while ((bh = bh->b_this_page) != head);

18
fs/fuse/file.c
View file

@ -2184,7 +2184,7 @@ static bool fuse_writepage_need_send(struct fuse_conn *fc, struct page *page,
return false;
}
static int fuse_writepages_fill(struct page *page,
static int fuse_writepages_fill(struct folio *folio,
struct writeback_control *wbc, void *_data)
{
struct fuse_fill_wb_data *data = _data;
@ -2203,7 +2203,7 @@ static int fuse_writepages_fill(struct page *page,
goto out_unlock;
}
if (wpa && fuse_writepage_need_send(fc, page, ap, data)) {
if (wpa && fuse_writepage_need_send(fc, &folio->page, ap, data)) {
fuse_writepages_send(data);
data->wpa = NULL;
}
@ -2238,7 +2238,7 @@ static int fuse_writepages_fill(struct page *page,
data->max_pages = 1;
ap = &wpa->ia.ap;
fuse_write_args_fill(&wpa->ia, data->ff, page_offset(page), 0);
fuse_write_args_fill(&wpa->ia, data->ff, folio_pos(folio), 0);
wpa->ia.write.in.write_flags |= FUSE_WRITE_CACHE;
wpa->next = NULL;
ap->args.in_pages = true;
@ -2246,13 +2246,13 @@ static int fuse_writepages_fill(struct page *page,
ap->num_pages = 0;
wpa->inode = inode;
}
set_page_writeback(page);
folio_start_writeback(folio);
copy_highpage(tmp_page, page);
copy_highpage(tmp_page, &folio->page);
ap->pages[ap->num_pages] = tmp_page;
ap->descs[ap->num_pages].offset = 0;
ap->descs[ap->num_pages].length = PAGE_SIZE;
data->orig_pages[ap->num_pages] = page;
data->orig_pages[ap->num_pages] = &folio->page;
inc_wb_stat(&inode_to_bdi(inode)->wb, WB_WRITEBACK);
inc_node_page_state(tmp_page, NR_WRITEBACK_TEMP);
@ -2266,13 +2266,13 @@ static int fuse_writepages_fill(struct page *page,
spin_lock(&fi->lock);
ap->num_pages++;
spin_unlock(&fi->lock);
} else if (fuse_writepage_add(wpa, page)) {
} else if (fuse_writepage_add(wpa, &folio->page)) {
data->wpa = wpa;
} else {
end_page_writeback(page);
folio_end_writeback(folio);
}
out_unlock:
unlock_page(page);
folio_unlock(folio);
return err;
}

5
fs/iomap/buffered-io.c
View file

@ -1685,10 +1685,9 @@ iomap_writepage_map(struct iomap_writepage_ctx *wpc,
* For unwritten space on the page, we need to start the conversion to
* regular allocated space.
*/
static int
iomap_do_writepage(struct page *page, struct writeback_control *wbc, void *data)
static int iomap_do_writepage(struct folio *folio,
struct writeback_control *wbc, void *data)
{
struct folio *folio = page_folio(page);
struct iomap_writepage_ctx *wpc = data;
struct inode *inode = folio->mapping->host;
u64 end_pos, isize;

3
fs/mpage.c
View file

@ -440,9 +440,10 @@ void clean_page_buffers(struct page *page)
clean_buffers(page, ~0U);
}
static int __mpage_writepage(struct page *page, struct writeback_control *wbc,
static int __mpage_writepage(struct folio *folio, struct writeback_control *wbc,
void *data)
{
struct page *page = &folio->page;
struct mpage_data *mpd = data;
struct bio *bio = mpd->bio;
struct address_space *mapping = page->mapping;

7
fs/nfs/write.c
View file

@ -689,13 +689,14 @@ int nfs_writepage(struct page *page, struct writeback_control *wbc)
return ret;
}
static int nfs_writepages_callback(struct page *page, struct writeback_control *wbc, void *data)
static int nfs_writepages_callback(struct folio *folio,
struct writeback_control *wbc, void *data)
{
int ret;
ret = nfs_do_writepage(page, wbc, data);
ret = nfs_do_writepage(&folio->page, wbc, data);
if (ret != AOP_WRITEPAGE_ACTIVATE)
unlock_page(page);
folio_unlock(folio);
return ret;
}

6
fs/ntfs3/inode.c
View file

@ -832,7 +832,7 @@ int ntfs_set_size(struct inode *inode, u64 new_size)
return err;
}
static int ntfs_resident_writepage(struct page *page,
static int ntfs_resident_writepage(struct folio *folio,
struct writeback_control *wbc, void *data)
{
struct address_space *mapping = data;
@ -840,11 +840,11 @@ static int ntfs_resident_writepage(struct page *page,
int ret;
ni_lock(ni);
ret = attr_data_write_resident(ni, page);
ret = attr_data_write_resident(ni, &folio->page);
ni_unlock(ni);
if (ret != E_NTFS_NONRESIDENT)
unlock_page(page);
folio_unlock(folio);
mapping_set_error(mapping, ret);
return ret;
}

23
fs/orangefs/inode.c
View file

@ -154,21 +154,20 @@ static int orangefs_writepages_work(struct orangefs_writepages *ow,
return ret;
}
static int orangefs_writepages_callback(struct page *page,
struct writeback_control *wbc, void *data)
static int orangefs_writepages_callback(struct folio *folio,
struct writeback_control *wbc, void *data)
{
struct orangefs_writepages *ow = data;
struct orangefs_write_range *wr;
struct orangefs_write_range *wr = folio->private;
int ret;
if (!PagePrivate(page)) {
unlock_page(page);
if (!wr) {
folio_unlock(folio);
/* It's not private so there's nothing to write, right? */
printk("writepages_callback not private!\n");
BUG();
return 0;
}
wr = (struct orangefs_write_range *)page_private(page);
ret = -1;
if (ow->npages == 0) {
@ -176,7 +175,7 @@ static int orangefs_writepages_callback(struct page *page,
ow->len = wr->len;
ow->uid = wr->uid;
ow->gid = wr->gid;
ow->pages[ow->npages++] = page;
ow->pages[ow->npages++] = &folio->page;
ret = 0;
goto done;
}
@ -188,7 +187,7 @@ static int orangefs_writepages_callback(struct page *page,
}
if (ow->off + ow->len == wr->pos) {
ow->len += wr->len;
ow->pages[ow->npages++] = page;
ow->pages[ow->npages++] = &folio->page;
ret = 0;
goto done;
}
@ -198,10 +197,10 @@ static int orangefs_writepages_callback(struct page *page,
orangefs_writepages_work(ow, wbc);
ow->npages = 0;
}
ret = orangefs_writepage_locked(page, wbc);
mapping_set_error(page->mapping, ret);
unlock_page(page);
end_page_writeback(page);
ret = orangefs_writepage_locked(&folio->page, wbc);
mapping_set_error(folio->mapping, ret);
folio_unlock(folio);
folio_end_writeback(folio);
} else {
if (ow->npages == ow->maxpages) {
orangefs_writepages_work(ow, wbc);

2
include/linux/writeback.h
View file

@ -366,7 +366,7 @@ int balance_dirty_pages_ratelimited_flags(struct address_space *mapping,
bool wb_over_bg_thresh(struct bdi_writeback *wb);
typedef int (*writepage_t)(struct page *page, struct writeback_control *wbc,
typedef int (*writepage_t)(struct folio *folio, struct writeback_control *wbc,
void *data);
void tag_pages_for_writeback(struct address_space *mapping,

6
mm/page-writeback.c
View file

@ -2470,7 +2470,7 @@ int write_cache_pages(struct address_space *mapping,
goto continue_unlock;
trace_wbc_writepage(wbc, inode_to_bdi(mapping->host));
error = writepage(&folio->page, wbc, data);
error = writepage(folio, wbc, data);
if (unlikely(error)) {
/*
* Handle errors according to the type of
@ -2528,11 +2528,11 @@ int write_cache_pages(struct address_space *mapping,
}
EXPORT_SYMBOL(write_cache_pages);
static int writepage_cb(struct page *page, struct writeback_control *wbc,
static int writepage_cb(struct folio *folio, struct writeback_control *wbc,
void *data)
{
struct address_space *mapping = data;
int ret = mapping->a_ops->writepage(page, wbc);
int ret = mapping->a_ops->writepage(&folio->page, wbc);
mapping_set_error(mapping, ret);
return ret;
}