82 static void erofs_bupdate_mapped(struct erofs_buffer_block *bb)  in erofs_bupdate_mapped()  argument
86 	if (bb->blkaddr == NULL_ADDR)  in erofs_bupdate_mapped()
89 	bkt = mapped_buckets[bb->type] + bb->buffers.off % EROFS_BLKSIZ;  in erofs_bupdate_mapped()
90 	list_del(&bb->mapped_list);  in erofs_bupdate_mapped()
91 	list_add_tail(&bb->mapped_list, bkt);  in erofs_bupdate_mapped()
95 static int __erofs_battach(struct erofs_buffer_block *bb,  in __erofs_battach()  argument
102 	const erofs_off_t alignedoffset = roundup(bb->buffers.off, alignsize);  in __erofs_battach()
103 	const int oob = cmpsgn(roundup((bb->buffers.off - 1) % EROFS_BLKSIZ + 1,  in __erofs_battach()
111 		if (oob && list_next_entry(bb, list)->blkaddr != NULL_ADDR)  in __erofs_battach()
114 		blkaddr = bb->blkaddr;  in __erofs_battach()
117 				      BLK_ROUND_UP(bb->buffers.off));  in __erofs_battach()
126 			bh->block = bb;  in __erofs_battach()
127 			list_add_tail(&bh->list, &bb->buffers.list);  in __erofs_battach()
129 		bb->buffers.off = alignedoffset + incr;  in __erofs_battach()
132 			tail_blkaddr = blkaddr + BLK_ROUND_UP(bb->buffers.off);  in __erofs_battach()
133 		erofs_bupdate_mapped(bb);  in __erofs_battach()
140 	struct erofs_buffer_block *const bb = bh->block;  in erofs_bh_balloon()  local
143 	if (bh->list.next != &bb->buffers.list)  in erofs_bh_balloon()
146 	return __erofs_battach(bb, NULL, incr, 1, 0, false);  in erofs_bh_balloon()
155 	struct erofs_buffer_block *cur, *bb;  in erofs_bfind_for_attach()  local
170 	bb = NULL;  in erofs_bfind_for_attach()
207 		bb = cur;  in erofs_bfind_for_attach()
247 			bb = cur;  in erofs_bfind_for_attach()
251 	*bbp = bb;  in erofs_bfind_for_attach()
259 	struct erofs_buffer_block *bb;  in erofs_balloc()  local
273 				     alignsize, &bb);  in erofs_balloc()
277 	if (bb) {  in erofs_balloc()
283 		bb = malloc(sizeof(struct erofs_buffer_block));  in erofs_balloc()
284 		if (!bb)  in erofs_balloc()
287 		bb->type = type;  in erofs_balloc()
288 		bb->blkaddr = NULL_ADDR;  in erofs_balloc()
289 		bb->buffers.off = 0;  in erofs_balloc()
290 		init_list_head(&bb->buffers.list);  in erofs_balloc()
291 		list_add_tail(&bb->list, &blkh.list);  in erofs_balloc()
292 		init_list_head(&bb->mapped_list);  in erofs_balloc()
296 			free(bb);  in erofs_balloc()
301 	ret = __erofs_battach(bb, bh, size, alignsize,  in erofs_balloc()
311 	struct erofs_buffer_block *const bb = bh->block;  in erofs_battach()  local
321 	if (bh->list.next != &bb->buffers.list)  in erofs_battach()
328 	ret = __erofs_battach(bb, nbh, size, alignsize, 0, false);  in erofs_battach()
337 static erofs_blk_t __erofs_mapbh(struct erofs_buffer_block *bb)  in __erofs_mapbh()  argument
341 	if (bb->blkaddr == NULL_ADDR) {  in __erofs_mapbh()
342 		bb->blkaddr = tail_blkaddr;  in __erofs_mapbh()
343 		last_mapped_block = bb;  in __erofs_mapbh()
344 		erofs_bupdate_mapped(bb);  in __erofs_mapbh()
347 	blkaddr = bb->blkaddr + BLK_ROUND_UP(bb->buffers.off);  in __erofs_mapbh()
354 erofs_blk_t erofs_mapbh(struct erofs_buffer_block *bb)  in erofs_mapbh()  argument
358 	if (bb && bb->blkaddr != NULL_ADDR)  in erofs_mapbh()
359 		return bb->blkaddr;  in erofs_mapbh()
367 	} while (t != bb);  in erofs_mapbh()
371 bool erofs_bflush(struct erofs_buffer_block *bb)  in erofs_bflush()  argument
381 		if (p == bb)  in erofs_bflush()
418 	struct erofs_buffer_block *const bb = bh->block;  in erofs_bdrop()  local
424 	    tail_blkaddr == blkaddr + BLK_ROUND_UP(bb->buffers.off))  in erofs_bdrop()
430 	if (!list_empty(&bb->buffers.list))  in erofs_bdrop()
433 	if (bb == last_mapped_block)  in erofs_bdrop()
434 		last_mapped_block = list_prev_entry(bb, list);  in erofs_bdrop()
436 	list_del(&bb->mapped_list);  in erofs_bdrop()
437 	list_del(&bb->list);  in erofs_bdrop()
438 	free(bb);  in erofs_bdrop()