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iomap: Convert bio completions to use folios

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Use bio_for_each_folio() to iterate over each folio in the bio
instead of iterating over each page.

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Matthew Wilcox (Oracle) 2021-01-01 16:53:26 -05:00
parent cd1e5afe55
commit 8ffd74e9a8
1 changed files with 21 additions and 29 deletions
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50
fs/iomap/buffered-io.c
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@ -161,34 +161,29 @@ static void iomap_set_range_uptodate(struct page *page,
SetPageUptodate(page);
}
static void
iomap_read_page_end_io(struct bio_vec *bvec, int error)
static void iomap_finish_folio_read(struct folio *folio, size_t offset,
size_t len, int error)
{
struct page *page = bvec->bv_page;
struct folio *folio = page_folio(page);
struct iomap_page *iop = to_iomap_page(folio);
if (unlikely(error)) {
ClearPageUptodate(page);
SetPageError(page);
folio_clear_uptodate(folio);
folio_set_error(folio);
} else {
iomap_set_range_uptodate(page, iop, bvec->bv_offset,
bvec->bv_len);
iomap_set_range_uptodate(&folio->page, iop, offset, len);
}
if (!iop || atomic_sub_and_test(bvec->bv_len, &iop->read_bytes_pending))
unlock_page(page);
if (!iop || atomic_sub_and_test(len, &iop->read_bytes_pending))
folio_unlock(folio);
}
static void
iomap_read_end_io(struct bio *bio)
static void iomap_read_end_io(struct bio *bio)
{
int error = blk_status_to_errno(bio->bi_status);
struct bio_vec *bvec;
struct bvec_iter_all iter_all;
struct folio_iter fi;
bio_for_each_segment_all(bvec, bio, iter_all)
iomap_read_page_end_io(bvec, error);
bio_for_each_folio_all(fi, bio)
iomap_finish_folio_read(fi.folio, fi.offset, fi.length, error);
bio_put(bio);
}
@ -1019,23 +1014,21 @@ out_unlock:
}
EXPORT_SYMBOL_GPL(iomap_page_mkwrite);
static void
iomap_finish_page_writeback(struct inode *inode, struct page *page,
int error, unsigned int len)
static void iomap_finish_folio_write(struct inode *inode, struct folio *folio,
size_t len, int error)
{
struct folio *folio = page_folio(page);
struct iomap_page *iop = to_iomap_page(folio);
if (error) {
SetPageError(page);
folio_set_error(folio);
mapping_set_error(inode->i_mapping, error);
}
WARN_ON_ONCE(i_blocks_per_page(inode, page) > 1 && !iop);
WARN_ON_ONCE(i_blocks_per_folio(inode, folio) > 1 && !iop);
WARN_ON_ONCE(iop && atomic_read(&iop->write_bytes_pending) <= 0);
if (!iop || atomic_sub_and_test(len, &iop->write_bytes_pending))
end_page_writeback(page);
folio_end_writeback(folio);
}
/*
@ -1054,8 +1047,7 @@ iomap_finish_ioend(struct iomap_ioend *ioend, int error)
bool quiet = bio_flagged(bio, BIO_QUIET);
for (bio = &ioend->io_inline_bio; bio; bio = next) {
struct bio_vec *bv;
struct bvec_iter_all iter_all;
struct folio_iter fi;
/*
* For the last bio, bi_private points to the ioend, so we
@ -1066,10 +1058,10 @@ iomap_finish_ioend(struct iomap_ioend *ioend, int error)
else
next = bio->bi_private;
/* walk each page on bio, ending page IO on them */
bio_for_each_segment_all(bv, bio, iter_all)
iomap_finish_page_writeback(inode, bv->bv_page, error,
bv->bv_len);
/* walk all folios in bio, ending page IO on them */
bio_for_each_folio_all(fi, bio)
iomap_finish_folio_write(inode, fi.folio, fi.length,
error);
bio_put(bio);
}
/* The ioend has been freed by bio_put() */