nilfs2: do not output warnings when clearing dirty buffers

After detecting file system corruption and degrading to a read-only mount,
dirty folios and buffers in the page cache are cleared, and a large number
of warnings are output at that time, often filling up the kernel log.

In this case, since the degrading to a read-only mount is output to the
kernel log, these warnings are not very meaningful, and are rather a
nuisance in system management and debugging.

The related nilfs2-specific page/folio routines have a silent argument
that suppresses the warning output, but since it is not currently used
meaningfully, remove both the silent argument and the warning output.

Link: https://lkml.kernel.org/r/20240816090128.4561-1-konishi.ryusuke@gmail.com
Signed-off-by: Ryusuke Konishi <konishi.ryusuke@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

fs/nilfs2/inode.c

@@ -162,7 +162,7 @@ static int nilfs_writepages(struct address_space *mapping,
 	int err = 0;
 
 	if (sb_rdonly(inode->i_sb)) {
-		nilfs_clear_dirty_pages(mapping, false);
+		nilfs_clear_dirty_pages(mapping);
 		return -EROFS;
 	}
 
@@ -186,7 +186,7 @@ static int nilfs_writepage(struct page *page, struct writeback_control *wbc)
 		 * have dirty pages that try to be flushed in background.
 		 * So, here we simply discard this dirty page.
 		 */
-		nilfs_clear_folio_dirty(folio, false);
+		nilfs_clear_folio_dirty(folio);
 		folio_unlock(folio);
 		return -EROFS;
 	}

fs/nilfs2/mdt.c

@@ -411,7 +411,7 @@ nilfs_mdt_write_page(struct page *page, struct writeback_control *wbc)
 		 * have dirty folios that try to be flushed in background.
 		 * So, here we simply discard this dirty folio.
 		 */
-		nilfs_clear_folio_dirty(folio, false);
+		nilfs_clear_folio_dirty(folio);
 		folio_unlock(folio);
 		return -EROFS;
 	}
@@ -638,10 +638,10 @@ void nilfs_mdt_restore_from_shadow_map(struct inode *inode)
 	if (mi->mi_palloc_cache)
 		nilfs_palloc_clear_cache(inode);
 
-	nilfs_clear_dirty_pages(inode->i_mapping, true);
+	nilfs_clear_dirty_pages(inode->i_mapping);
 	nilfs_copy_back_pages(inode->i_mapping, shadow->inode->i_mapping);
 
-	nilfs_clear_dirty_pages(ii->i_assoc_inode->i_mapping, true);
+	nilfs_clear_dirty_pages(ii->i_assoc_inode->i_mapping);
 	nilfs_copy_back_pages(ii->i_assoc_inode->i_mapping,
 			      NILFS_I(shadow->inode)->i_assoc_inode->i_mapping);
 

fs/nilfs2/page.c

@@ -357,9 +357,8 @@ void nilfs_copy_back_pages(struct address_space *dmap,
 /**
  * nilfs_clear_dirty_pages - discard dirty pages in address space
  * @mapping: address space with dirty pages for discarding
- * @silent: suppress [true] or print [false] warning messages
  */
-void nilfs_clear_dirty_pages(struct address_space *mapping, bool silent)
+void nilfs_clear_dirty_pages(struct address_space *mapping)
 {
 	struct folio_batch fbatch;
 	unsigned int i;
@@ -380,7 +379,7 @@ void nilfs_clear_dirty_pages(struct address_space *mapping, bool silent)
 			 * was acquired.  Skip processing in that case.
 			 */
 			if (likely(folio->mapping == mapping))
-				nilfs_clear_folio_dirty(folio, silent);
+				nilfs_clear_folio_dirty(folio);
 
 			folio_unlock(folio);
 		}
@@ -392,20 +391,13 @@ void nilfs_clear_dirty_pages(struct address_space *mapping, bool silent)
 /**
  * nilfs_clear_folio_dirty - discard dirty folio
  * @folio: dirty folio that will be discarded
- * @silent: suppress [true] or print [false] warning messages
  */
-void nilfs_clear_folio_dirty(struct folio *folio, bool silent)
+void nilfs_clear_folio_dirty(struct folio *folio)
 {
-	struct inode *inode = folio->mapping->host;
-	struct super_block *sb = inode->i_sb;
 	struct buffer_head *bh, *head;
 
 	BUG_ON(!folio_test_locked(folio));
 
-	if (!silent)
-		nilfs_warn(sb, "discard dirty page: offset=%lld, ino=%lu",
-			   folio_pos(folio), inode->i_ino);
-
 	folio_clear_uptodate(folio);
 	folio_clear_mappedtodisk(folio);
 
@@ -419,11 +411,6 @@ void nilfs_clear_folio_dirty(struct folio *folio, bool silent)
 		bh = head;
 		do {
 			lock_buffer(bh);
-			if (!silent)
-				nilfs_warn(sb,
-					   "discard dirty block: blocknr=%llu, size=%zu",
-					   (u64)bh->b_blocknr, bh->b_size);
-
 			set_mask_bits(&bh->b_state, clear_bits, 0);
 			unlock_buffer(bh);
 		} while (bh = bh->b_this_page, bh != head);

fs/nilfs2/page.h

@@ -41,8 +41,8 @@ void nilfs_folio_bug(struct folio *);
 
 int nilfs_copy_dirty_pages(struct address_space *, struct address_space *);
 void nilfs_copy_back_pages(struct address_space *, struct address_space *);
-void nilfs_clear_folio_dirty(struct folio *, bool);
-void nilfs_clear_dirty_pages(struct address_space *, bool);
+void nilfs_clear_folio_dirty(struct folio *folio);
+void nilfs_clear_dirty_pages(struct address_space *mapping);
 unsigned int nilfs_page_count_clean_buffers(struct page *, unsigned int,
 					    unsigned int);
 unsigned long nilfs_find_uncommitted_extent(struct inode *inode,