fs/nilfs2/mdt.c

31 			   struct buffer_head *bh,
36 	struct folio *folio = bh->b_folio;
42 	/* set_buffer_new(bh); */
43 	bh->b_blocknr = 0;
45 	ret = nilfs_bmap_insert(ii->i_bmap, block, (unsigned long)bh);
49 	set_buffer_mapped(bh);
52 	from = kmap_local_folio(folio, offset_in_folio(folio, bh->b_data));
53 	memset(from, 0, bh->b_size);
55 		init_block(inode, bh, from);
60 	set_buffer_uptodate(bh);
61 	mark_buffer_dirty(bh);
77 	struct buffer_head *bh;
83 	bh = nilfs_grab_buffer(inode, inode->i_mapping, block, 0);
84 	if (unlikely(!bh))
88 	if (buffer_uptodate(bh))
91 	wait_on_buffer(bh);
92 	if (buffer_uptodate(bh))
95 	err = nilfs_mdt_insert_new_block(inode, block, bh, init_block);
97 		get_bh(bh);
98 		*out_bh = bh;
102 	folio_unlock(bh->b_folio);
103 	folio_put(bh->b_folio);
104 	brelse(bh);
119 	struct buffer_head *bh;
123 	bh = nilfs_grab_buffer(inode, inode->i_mapping, blkoff, 0);
124 	if (unlikely(!bh))
128 	if (buffer_uptodate(bh))
132 		if (!trylock_buffer(bh)) {
137 		lock_buffer(bh);
139 	if (buffer_uptodate(bh)) {
140 		unlock_buffer(bh);
146 		unlock_buffer(bh);
149 	map_bh(bh, inode->i_sb, (sector_t)blknum);
151 	bh->b_end_io = end_buffer_read_sync;
152 	get_bh(bh);
153 	submit_bh(opf, bh);
159 	get_bh(bh);
160 	*out_bh = bh;
163 	folio_unlock(bh->b_folio);
164 	folio_put(bh->b_folio);
165 	brelse(bh);
173 	struct buffer_head *first_bh, *bh;
189 						REQ_OP_READ | REQ_RAHEAD, &bh);
191 				brelse(bh);
358 	struct buffer_head *bh;
368 	bh = folio_buffers(folio);
369 	if (bh) {
372 		bh = get_nth_bh(bh, block - first_block);
373 		nilfs_forget_buffer(bh);
568 int nilfs_mdt_freeze_buffer(struct inode *inode, struct buffer_head *bh)
576 			bh->b_folio->index);
585 			       offset_in_folio(folio, bh->b_data) >> blkbits);
588 		nilfs_copy_buffer(bh_frozen, bh);
592 		set_buffer_nilfs_redirected(bh);
603 nilfs_mdt_get_frozen_buffer(struct inode *inode, struct buffer_head *bh)
611 			bh->b_folio->index);
615 			n = offset_in_folio(folio, bh->b_data) >>
628 	struct buffer_head *bh;
631 		bh = list_first_entry(head, struct buffer_head,
633 		list_del_init(&bh->b_assoc_buffers);
634 		brelse(bh); /* drop ref-count to make it releasable */