[PATCH 01/12] mm/filemap: change filemap_create_folio() to take a struct kiocb

Jens Axboe
2024-12-03T15:32:47Z

Rather than pass in both the file and position directly from the kiocb,
just take a struct kiocb instead. While doing so, move the ki_flags
checking into filemap_create_folio() as well. In preparation for actually
needing the kiocb in the function.

No functional changes in this patch.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
---
mm/filemap.c | 17 +++++++++--------
1 file changed, 9 insertions(+), 8 deletions(-)

diff --git a/mm/filemap.c b/mm/filemap.c
index 7c76a123ba18..898e992039e8 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -2459,15 +2459,17 @@ static int filemap_update_page(struct kiocb *iocb,
return error;
}

-static int filemap_create_folio(struct file *file,
- struct address_space *mapping, loff_t pos,
- struct folio_batch *fbatch)
+static int filemap_create_folio(struct kiocb *iocb,
+ struct address_space *mapping, struct folio_batch *fbatch)
{
struct folio *folio;
int error;
unsigned int min_order = mapping_min_folio_order(mapping);
pgoff_t index;

+ if (iocb->ki_flags & (IOCB_NOWAIT | IOCB_WAITQ))
+ return -EAGAIN;
+
folio = filemap_alloc_folio(mapping_gfp_mask(mapping), min_order);
if (!folio)
return -ENOMEM;
@@ -2486,7 +2488,7 @@ static int filemap_create_folio(struct file *file,
* well to keep locking rules simple.
*/
filemap_invalidate_lock_shared(mapping);
- index = (pos >> (PAGE_SHIFT + min_order)) << min_order;
+ index = (iocb->ki_pos >> (PAGE_SHIFT + min_order)) << min_order;
error = filemap_add_folio(mapping, folio, index,
mapping_gfp_constraint(mapping, GFP_KERNEL));
if (error == -EEXIST)
@@ -2494,7 +2496,8 @@ static int filemap_create_folio(struct file *file,
if (error)
goto error;

- error = filemap_read_folio(file, mapping->a_ops->read_folio, folio);
+ error = filemap_read_folio(iocb->ki_filp, mapping->a_ops->read_folio,
+ folio);
if (error)
goto error;

@@ -2550,9 +2553,7 @@ static int filemap_get_pages(struct kiocb *iocb, size_t count,
filemap_get_read_batch(mapping, index, last_index - 1, fbatch);
}
if (!folio_batch_count(fbatch)) {
- if (iocb->ki_flags & (IOCB_NOWAIT | IOCB_WAITQ))
- return -EAGAIN;
- err = filemap_create_folio(filp, mapping, iocb->ki_pos, fbatch);
+ err = filemap_create_folio(iocb, mapping, fbatch);
if (err == AOP_TRUNCATED_PAGE)
goto retry;
return err;
--
2.45.2