1 files changed, 52 insertions, 51 deletions

diff --git a/fs/gfs2/meta_io.c b/fs/gfs2/meta_io.c
index 1f42eae112fb..b795ca7765cd 100644
--- a/fs/gfs2/meta_io.c
+++ b/fs/gfs2/meta_io.c
@@ -30,16 +30,16 @@
 #include "util.h"
 #include "trace_gfs2.h"
 
-static int gfs2_aspace_writepage(struct page *page, struct writeback_control *wbc)
+static void gfs2_aspace_write_folio(struct folio *folio,
+		struct writeback_control *wbc)
 {
 	struct buffer_head *bh, *head;
 	int nr_underway = 0;
 	blk_opf_t write_flags = REQ_META | REQ_PRIO | wbc_to_write_flags(wbc);
 
-	BUG_ON(!PageLocked(page));
-	BUG_ON(!page_has_buffers(page));
+	BUG_ON(!folio_test_locked(folio));
 
-	head = page_buffers(page);
+	head = folio_buffers(folio);
 	bh = head;
 
 	do {
@@ -55,7 +55,7 @@ static int gfs2_aspace_writepage(struct page *page, struct writeback_control *wb
 		if (wbc->sync_mode != WB_SYNC_NONE) {
 			lock_buffer(bh);
 		} else if (!trylock_buffer(bh)) {
-			redirty_page_for_writepage(wbc, page);
+			folio_redirty_for_writepage(wbc, folio);
 			continue;
 		}
 		if (test_clear_buffer_dirty(bh)) {
@@ -66,11 +66,11 @@ static int gfs2_aspace_writepage(struct page *page, struct writeback_control *wb
 	} while ((bh = bh->b_this_page) != head);
 
 	/*
-	 * The page and its buffers are protected by PageWriteback(), so we can
-	 * drop the bh refcounts early.
+	 * The folio and its buffers are protected from truncation by
+	 * the writeback flag, so we can drop the bh refcounts early.
 	 */
-	BUG_ON(PageWriteback(page));
-	set_page_writeback(page);
+	BUG_ON(folio_test_writeback(folio));
+	folio_start_writeback(folio);
 
 	do {
 		struct buffer_head *next = bh->b_this_page;
@@ -80,26 +80,38 @@ static int gfs2_aspace_writepage(struct page *page, struct writeback_control *wb
 		}
 		bh = next;
 	} while (bh != head);
-	unlock_page(page);
+	folio_unlock(folio);
 
 	if (nr_underway == 0)
-		end_page_writeback(page);
+		folio_end_writeback(folio);
+}
 
-	return 0;
+static int gfs2_aspace_writepages(struct address_space *mapping,
+		struct writeback_control *wbc)
+{
+	struct folio *folio = NULL;
+	int error;
+
+	while ((folio = writeback_iter(mapping, wbc, folio, &error)))
+		gfs2_aspace_write_folio(folio, wbc);
+
+	return error;
 }
 
 const struct address_space_operations gfs2_meta_aops = {
 	.dirty_folio	= block_dirty_folio,
 	.invalidate_folio = block_invalidate_folio,
-	.writepage = gfs2_aspace_writepage,
+	.writepages = gfs2_aspace_writepages,
 	.release_folio = gfs2_release_folio,
+	.migrate_folio = buffer_migrate_folio_norefs,
 };
 
 const struct address_space_operations gfs2_rgrp_aops = {
 	.dirty_folio	= block_dirty_folio,
 	.invalidate_folio = block_invalidate_folio,
-	.writepage = gfs2_aspace_writepage,
+	.writepages = gfs2_aspace_writepages,
 	.release_folio = gfs2_release_folio,
+	.migrate_folio = buffer_migrate_folio_norefs,
 };
 
 /**
@@ -115,50 +127,45 @@ struct buffer_head *gfs2_getbuf(struct gfs2_glock *gl, u64 blkno, int create)
 {
 	struct address_space *mapping = gfs2_glock2aspace(gl);
 	struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;
-	struct page *page;
+	struct folio *folio;
 	struct buffer_head *bh;
 	unsigned int shift;
 	unsigned long index;
 	unsigned int bufnum;
 
 	if (mapping == NULL)
-		mapping = &sdp->sd_aspace;
+		mapping = gfs2_aspace(sdp);
 
 	shift = PAGE_SHIFT - sdp->sd_sb.sb_bsize_shift;
 	index = blkno >> shift;             /* convert block to page */
 	bufnum = blkno - (index << shift);  /* block buf index within page */
 
 	if (create) {
-		for (;;) {
-			page = grab_cache_page(mapping, index);
-			if (page)
-				break;
-			yield();
-		}
-		if (!page_has_buffers(page))
-			create_empty_buffers(page, sdp->sd_sb.sb_bsize, 0);
+		folio = __filemap_get_folio(mapping, index,
+				FGP_LOCK | FGP_ACCESSED | FGP_CREAT,
+				mapping_gfp_mask(mapping) | __GFP_NOFAIL);
+		bh = folio_buffers(folio);
+		if (!bh)
+			bh = create_empty_buffers(folio,
+				sdp->sd_sb.sb_bsize, 0);
 	} else {
-		page = find_get_page_flags(mapping, index,
-						FGP_LOCK|FGP_ACCESSED);
-		if (!page)
+		folio = __filemap_get_folio(mapping, index,
+				FGP_LOCK | FGP_ACCESSED, 0);
+		if (IS_ERR(folio))
 			return NULL;
-		if (!page_has_buffers(page)) {
-			bh = NULL;
-			goto out_unlock;
-		}
+		bh = folio_buffers(folio);
 	}
 
-	/* Locate header for our buffer within our page */
-	for (bh = page_buffers(page); bufnum--; bh = bh->b_this_page)
-		/* Do nothing */;
-	get_bh(bh);
+	if (!bh)
+		goto out_unlock;
 
+	bh = get_nth_bh(bh, bufnum);
 	if (!buffer_mapped(bh))
 		map_bh(bh, sdp->sd_vfs, blkno);
 
 out_unlock:
-	unlock_page(page);
-	put_page(page);
+	folio_unlock(folio);
+	folio_put(folio);
 
 	return bh;
 }
@@ -408,26 +415,20 @@ static struct buffer_head *gfs2_getjdatabuf(struct gfs2_inode *ip, u64 blkno)
 {
 	struct address_space *mapping = ip->i_inode.i_mapping;
 	struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
-	struct page *page;
+	struct folio *folio;
 	struct buffer_head *bh;
 	unsigned int shift = PAGE_SHIFT - sdp->sd_sb.sb_bsize_shift;
 	unsigned long index = blkno >> shift; /* convert block to page */
 	unsigned int bufnum = blkno - (index << shift);
 
-	page = find_get_page_flags(mapping, index, FGP_LOCK|FGP_ACCESSED);
-	if (!page)
+	folio = __filemap_get_folio(mapping, index, FGP_LOCK | FGP_ACCESSED, 0);
+	if (IS_ERR(folio))
 		return NULL;
-	if (!page_has_buffers(page)) {
-		unlock_page(page);
-		put_page(page);
-		return NULL;
-	}
-	/* Locate header for our buffer within our page */
-	for (bh = page_buffers(page); bufnum--; bh = bh->b_this_page)
-		/* Do nothing */;
-	get_bh(bh);
-	unlock_page(page);
-	put_page(page);
+	bh = folio_buffers(folio);
+	if (bh)
+		bh = get_nth_bh(bh, bufnum);
+	folio_unlock(folio);
+	folio_put(folio);
 	return bh;
 }