Convert mpage to folios and associate the number of blocks with
a folio and not a page.
Signed-off-by: Hannes Reinecke <hare@xxxxxxxxxx>
---
fs/mpage.c | 45 +++++++++++++++++++++------------------------
1 file changed, 21 insertions(+), 24 deletions(-)
diff --git a/fs/mpage.c b/fs/mpage.c
index 558b627d382c..7cb9d9efdba8 100644
--- a/fs/mpage.c
+++ b/fs/mpage.c
@@ -114,7 +114,7 @@ static void map_buffer_to_folio(struct folio *folio, struct buffer_head *bh,
* don't make any buffers if there is only one buffer on
* the folio and the folio just needs to be set up to date
*/
- if (inode->i_blkbits == PAGE_SHIFT &&
+ if (inode->i_blkbits == folio_shift(folio) &&
buffer_uptodate(bh)) {
folio_mark_uptodate(folio);
return;
@@ -160,7 +160,7 @@ static struct bio *do_mpage_readpage(struct mpage_readpage_args *args)
struct folio *folio = args->folio;
struct inode *inode = folio->mapping->host;
const unsigned blkbits = inode->i_blkbits;
- const unsigned blocks_per_page = PAGE_SIZE >> blkbits;
+ const unsigned blocks_per_folio = folio_size(folio) >> blkbits;
const unsigned blocksize = 1 << blkbits;
struct buffer_head *map_bh = &args->map_bh;
sector_t block_in_file;
@@ -168,7 +168,7 @@ static struct bio *do_mpage_readpage(struct mpage_readpage_args *args)
sector_t last_block_in_file;
sector_t first_block;
unsigned page_block;
- unsigned first_hole = blocks_per_page;
+ unsigned first_hole = blocks_per_folio;
struct block_device *bdev = NULL;
int length;
int fully_mapped = 1;
@@ -177,9 +177,6 @@ static struct bio *do_mpage_readpage(struct mpage_readpage_args *args)
unsigned relative_block;
gfp_t gfp = mapping_gfp_constraint(folio->mapping, GFP_KERNEL);
- /* MAX_BUF_PER_PAGE, for example */
- VM_BUG_ON_FOLIO(folio_test_large(folio), folio);
-
if (args->is_readahead) {
opf |= REQ_RAHEAD;
gfp |= __GFP_NORETRY | __GFP_NOWARN;
@@ -189,7 +186,7 @@ static struct bio *do_mpage_readpage(struct mpage_readpage_args *args)
goto confused;
block_in_file = folio_pos(folio) >> blkbits;
- last_block = block_in_file + args->nr_pages * blocks_per_page;
+ last_block = block_in_file + ((args->nr_pages * PAGE_SIZE) >> blkbits);
last_block_in_file = (i_size_read(inode) + blocksize - 1) >> blkbits;
if (last_block > last_block_in_file)
last_block = last_block_in_file;
@@ -211,7 +208,7 @@ static struct bio *do_mpage_readpage(struct mpage_readpage_args *args)
clear_buffer_mapped(map_bh);
break;
}
- if (page_block == blocks_per_page)
+ if (page_block == blocks_per_folio)
break;
page_block++;
block_in_file++;
@@ -223,7 +220,7 @@ static struct bio *do_mpage_readpage(struct mpage_readpage_args *args)
* Then do more get_blocks calls until we are done with this folio.
*/
map_bh->b_folio = folio;
- while (page_block < blocks_per_page) {
+ while (page_block < blocks_per_folio) {
map_bh->b_state = 0;
map_bh->b_size = 0;
@@ -236,7 +233,7 @@ static struct bio *do_mpage_readpage(struct mpage_readpage_args *args)
if (!buffer_mapped(map_bh)) {
fully_mapped = 0;
- if (first_hole == blocks_per_page)
+ if (first_hole == blocks_per_folio)
first_hole = page_block;
page_block++;
block_in_file++;
@@ -254,7 +251,7 @@ static struct bio *do_mpage_readpage(struct mpage_readpage_args *args)
goto confused;
}
- if (first_hole != blocks_per_page)
+ if (first_hole != blocks_per_folio)
goto confused; /* hole -> non-hole */
/* Contiguous blocks? */
@@ -267,7 +264,7 @@ static struct bio *do_mpage_readpage(struct mpage_readpage_args *args)
if (relative_block == nblocks) {
clear_buffer_mapped(map_bh);
break;
- } else if (page_block == blocks_per_page)
+ } else if (page_block == blocks_per_folio)
break;
page_block++;
block_in_file++;
@@ -275,8 +272,8 @@ static struct bio *do_mpage_readpage(struct mpage_readpage_args *args)
bdev = map_bh->b_bdev;
}
- if (first_hole != blocks_per_page) {
- folio_zero_segment(folio, first_hole << blkbits, PAGE_SIZE);
+ if (first_hole != blocks_per_folio) {
+ folio_zero_segment(folio, first_hole << blkbits, folio_size(folio));
if (first_hole == 0) {
folio_mark_uptodate(folio);
folio_unlock(folio);
@@ -310,10 +307,10 @@ static struct bio *do_mpage_readpage(struct mpage_readpage_args *args)
relative_block = block_in_file - args->first_logical_block;
nblocks = map_bh->b_size >> blkbits;
if ((buffer_boundary(map_bh) && relative_block == nblocks) ||
- (first_hole != blocks_per_page))
+ (first_hole != blocks_per_folio))
args->bio = mpage_bio_submit_read(args->bio);
else
- args->last_block_in_bio = first_block + blocks_per_page - 1;
+ args->last_block_in_bio = first_block + blocks_per_folio - 1;
out:
return args->bio;
@@ -392,7 +389,7 @@ int mpage_read_folio(struct folio *folio, get_block_t get_block)
{
struct mpage_readpage_args args = {
.folio = folio,
- .nr_pages = 1,
+ .nr_pages = folio_nr_pages(folio),
.get_block = get_block,
};
@@ -463,12 +460,12 @@ static int __mpage_writepage(struct folio *folio, struct writeback_control *wbc,
struct address_space *mapping = folio->mapping;
struct inode *inode = mapping->host;
const unsigned blkbits = inode->i_blkbits;
- const unsigned blocks_per_page = PAGE_SIZE >> blkbits;
+ const unsigned blocks_per_folio = folio_size(folio) >> blkbits;
sector_t last_block;
sector_t block_in_file;
sector_t first_block;
unsigned page_block;
- unsigned first_unmapped = blocks_per_page;
+ unsigned first_unmapped = blocks_per_folio;
struct block_device *bdev = NULL;
int boundary = 0;
sector_t boundary_block = 0;
@@ -493,12 +490,12 @@ static int __mpage_writepage(struct folio *folio, struct writeback_control *wbc,
*/
if (buffer_dirty(bh))
goto confused;
- if (first_unmapped == blocks_per_page)
+ if (first_unmapped == blocks_per_folio)
first_unmapped = page_block;
continue;
}
- if (first_unmapped != blocks_per_page)
+ if (first_unmapped != blocks_per_folio)
goto confused; /* hole -> non-hole */
if (!buffer_dirty(bh) || !buffer_uptodate(bh))
@@ -543,7 +540,7 @@ static int __mpage_writepage(struct folio *folio, struct writeback_control *wbc,
goto page_is_mapped;
last_block = (i_size - 1) >> blkbits;
map_bh.b_folio = folio;
- for (page_block = 0; page_block < blocks_per_page; ) {
+ for (page_block = 0; page_block < blocks_per_folio; ) {
map_bh.b_state = 0;
map_bh.b_size = 1 << blkbits;
@@ -625,14 +622,14 @@ static int __mpage_writepage(struct folio *folio, struct writeback_control *wbc,
BUG_ON(folio_test_writeback(folio));
folio_start_writeback(folio);
folio_unlock(folio);
- if (boundary || (first_unmapped != blocks_per_page)) {
+ if (boundary || (first_unmapped != blocks_per_folio)) {
bio = mpage_bio_submit_write(bio);
if (boundary_block) {
write_boundary_block(boundary_bdev,
boundary_block, 1 << blkbits);
}
} else {
- mpd->last_block_in_bio = first_block + blocks_per_page - 1;
+ mpd->last_block_in_bio = first_block + blocks_per_folio - 1;
}
goto out;
--
2.35.3
