gfs2: support ludicrously large folios in gfs2_trans_add_databufs()

We may someday support folios larger than 4GB, so use a size_t for the
byte count within a folio to prevent unpleasant truncations.

Link: https://lkml.kernel.org/r/20230612210141.730128-6-willy@infradead.org
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Tested-by: Bob Peterson <rpeterso@redhat.com>
Reviewed-by: Bob Peterson <rpeterso@redhat.com>
Reviewed-by: Andreas Gruenbacher <agruenba@redhat.com>
Cc: Hannes Reinecke <hare@suse.com>
Cc: Luis Chamberlain <mcgrof@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

diff --git a/fs/gfs2/aops.c b/fs/gfs2/aops.c
index 3a2be19..1c407eb 100644 (file)
--- a/fs/gfs2/aops.c
+++ b/fs/gfs2/aops.c
@@ -38,13 +38,13 @@
 
 
 void gfs2_trans_add_databufs(struct gfs2_inode *ip, struct folio *folio,
-                            unsigned int from, unsigned int len)
+                            size_t from, size_t len)
 {
        struct buffer_head *head = folio_buffers(folio);
        unsigned int bsize = head->b_size;
        struct buffer_head *bh;
-       unsigned int to = from + len;
-       unsigned int start, end;
+       size_t to = from + len;
+       size_t start, end;
 
        for (bh = head, start = 0; bh != head || !start;
             bh = bh->b_this_page, start = end) {

diff --git a/fs/gfs2/aops.h b/fs/gfs2/aops.h
index 09db191..f08322e 100644 (file)
--- a/fs/gfs2/aops.h
+++ b/fs/gfs2/aops.h
@@ -10,6 +10,6 @@
 
 extern void adjust_fs_space(struct inode *inode);
 extern void gfs2_trans_add_databufs(struct gfs2_inode *ip, struct folio *folio,
-                                   unsigned int from, unsigned int len);
+                                   size_t from, size_t len);
 
 #endif /* __AOPS_DOT_H__ */