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iomap: Add __iomap_put_folio helper 

Add an __iomap_put_folio() helper to encapsulate unlocking the folio,
calling ->page_done(), and putting the folio.  Use the new helper in
iomap_write_begin() and iomap_write_end().

This effectively doesn't change the way the code works, but prepares for
successive improvements.

Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
This commit is contained in:
Andreas Gruenbacher 2023-01-15 08:45:50 -08:00 committed by Darrick J. Wong
parent 5dc4c995db
commit 7a70a5085e
1 changed files with 17 additions and 12 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

29
fs/iomap/buffered-io.c
View File

@ -575,6 +575,19 @@ static int __iomap_write_begin(const struct iomap_iter *iter, loff_t pos,
return 0;
}
static void __iomap_put_folio(struct iomap_iter *iter, loff_t pos, size_t ret,
struct folio *folio)
{
const struct iomap_page_ops *page_ops = iter->iomap.page_ops;
if (folio)
folio_unlock(folio);
if (page_ops && page_ops->page_done)
page_ops->page_done(iter->inode, pos, ret, &folio->page);
if (folio)
folio_put(folio);
}
static int iomap_write_begin_inline(const struct iomap_iter *iter,
struct folio *folio)
{
@ -616,7 +629,8 @@ static int iomap_write_begin(struct iomap_iter *iter, loff_t pos,
fgp, mapping_gfp_mask(iter->inode->i_mapping));
if (!folio) {
status = (iter->flags & IOMAP_NOWAIT) ? -EAGAIN : -ENOMEM;
goto out_no_page;
__iomap_put_folio(iter, pos, 0, NULL);
return status;
}
/*
@ -656,13 +670,9 @@ static int iomap_write_begin(struct iomap_iter *iter, loff_t pos,
return 0;
out_unlock:
folio_unlock(folio);
folio_put(folio);
__iomap_put_folio(iter, pos, 0, folio);
iomap_write_failed(iter->inode, pos, len);
out_no_page:
if (page_ops && page_ops->page_done)
page_ops->page_done(iter->inode, pos, 0, NULL);
return status;
}
@ -712,7 +722,6 @@ static size_t iomap_write_end_inline(const struct iomap_iter *iter,
static size_t iomap_write_end(struct iomap_iter *iter, loff_t pos, size_t len,
size_t copied, struct folio *folio)
{
const struct iomap_page_ops *page_ops = iter->iomap.page_ops;
const struct iomap *srcmap = iomap_iter_srcmap(iter);
loff_t old_size = iter->inode->i_size;
size_t ret;
@ -735,14 +744,10 @@ static size_t iomap_write_end(struct iomap_iter *iter, loff_t pos, size_t len,
i_size_write(iter->inode, pos + ret);
iter->iomap.flags |= IOMAP_F_SIZE_CHANGED;
}
folio_unlock(folio);
__iomap_put_folio(iter, pos, ret, folio);
if (old_size < pos)
pagecache_isize_extended(iter->inode, old_size, pos);
if (page_ops && page_ops->page_done)
page_ops->page_done(iter->inode, pos, ret, &folio->page);
folio_put(folio);
if (ret < len)
iomap_write_failed(iter->inode, pos + ret, len - ret);
return ret;