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fuse: support large folios for writeback

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Add support for folios larger than one page size for writeback.

Signed-off-by: Joanne Koong <joannelkoong@gmail.com>
Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
This commit is contained in:
Joanne Koong
2025-05-12 15:58:40 -07:00
committed by Miklos Szeredi
parent 906354c87f
commit f3cb8bd908
1 changed files with 8 additions and 4 deletions
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12
fs/fuse/file.c
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@@ -1988,7 +1988,7 @@ static void fuse_writepage_args_page_fill(struct fuse_writepage_args *wpa, struc
ap->folios[folio_index] = folio;
ap->descs[folio_index].offset = 0;
ap->descs[folio_index].length = PAGE_SIZE;
ap->descs[folio_index].length = folio_size(folio);
inc_wb_stat(&inode_to_bdi(inode)->wb, WB_WRITEBACK);
}
@@ -2062,6 +2062,7 @@ struct fuse_fill_wb_data {
struct fuse_file *ff;
struct inode *inode;
unsigned int max_folios;
unsigned int nr_pages;
};
static bool fuse_pages_realloc(struct fuse_fill_wb_data *data)
@@ -2109,15 +2110,15 @@ static bool fuse_writepage_need_send(struct fuse_conn *fc, struct folio *folio,
WARN_ON(!ap->num_folios);
/* Reached max pages */
if (ap->num_folios == fc->max_pages)
if (data->nr_pages + folio_nr_pages(folio) > fc->max_pages)
return true;
/* Reached max write bytes */
if ((ap->num_folios + 1) * PAGE_SIZE > fc->max_write)
if ((data->nr_pages * PAGE_SIZE) + folio_size(folio) > fc->max_write)
return true;
/* Discontinuity */
if (ap->folios[ap->num_folios - 1]->index + 1 != folio_index(folio))
if (folio_next_index(ap->folios[ap->num_folios - 1]) != folio_index(folio))
return true;
/* Need to grow the pages array? If so, did the expansion fail? */
@@ -2148,6 +2149,7 @@ static int fuse_writepages_fill(struct folio *folio,
if (wpa && fuse_writepage_need_send(fc, folio, ap, data)) {
fuse_writepages_send(data);
data->wpa = NULL;
data->nr_pages = 0;
}
if (data->wpa == NULL) {
@@ -2162,6 +2164,7 @@ static int fuse_writepages_fill(struct folio *folio,
folio_start_writeback(folio);
fuse_writepage_args_page_fill(wpa, folio, ap->num_folios);
data->nr_pages += folio_nr_pages(folio);
err = 0;
ap->num_folios++;
@@ -2192,6 +2195,7 @@ static int fuse_writepages(struct address_space *mapping,
data.inode = inode;
data.wpa = NULL;
data.ff = NULL;
data.nr_pages = 0;
err = write_cache_pages(mapping, wbc, fuse_writepages_fill, &data);
if (data.wpa) {