fs/ufs/util.h

313  * Extract the bits for a block from a map inside ufs_buffer_head
458 #define ubh_isblockclear(ubh,begin,block) (!_ubh_isblockset_(uspi,ubh,begin,block))
460 #define ubh_isblockset(ubh,begin,block) _ubh_isblockset_(uspi,ubh,begin,block)
462 	struct ufs_buffer_head * ubh, unsigned begin, unsigned block)
467 	    	return (*ubh_get_addr (ubh, begin + block) == 0xff);
469 		mask = 0x0f << ((block & 0x01) << 2);
470 		return (*ubh_get_addr (ubh, begin + (block >> 1)) & mask) == mask;
472 		mask = 0x03 << ((block & 0x03) << 1);
473 		return (*ubh_get_addr (ubh, begin + (block >> 2)) & mask) == mask;
475 		mask = 0x01 << (block & 0x07);
476 		return (*ubh_get_addr (ubh, begin + (block >> 3)) & mask) == mask;
481 #define ubh_clrblock(ubh,begin,block) _ubh_clrblock_(uspi,ubh,begin,block)
483 	struct ufs_buffer_head * ubh, unsigned begin, unsigned block)
487 	    	*ubh_get_addr (ubh, begin + block) = 0x00;
490 		*ubh_get_addr (ubh, begin + (block >> 1)) &= ~(0x0f << ((block & 0x01) << 2));
493 		*ubh_get_addr (ubh, begin + (block >> 2)) &= ~(0x03 << ((block & 0x03) << 1));
496 		*ubh_get_addr (ubh, begin + (block >> 3)) &= ~(0x01 << ((block & 0x07)));
501 #define ubh_setblock(ubh,begin,block) _ubh_setblock_(uspi,ubh,begin,block)
503 	struct ufs_buffer_head * ubh, unsigned begin, unsigned block)
507 	    	*ubh_get_addr(ubh, begin + block) = 0xff;
510 		*ubh_get_addr(ubh, begin + (block >> 1)) |= (0x0f << ((block & 0x01) << 2));
513 		*ubh_get_addr(ubh, begin + (block >> 2)) |= (0x03 << ((block & 0x03) << 1));
516 		*ubh_get_addr(ubh, begin + (block >> 3)) |= (0x01 << ((block & 0x07)));