107 	BUFHEAD *bp;  in __get_buf()  local
115 		bp = prev_bp->ovfl;  in __get_buf()
116 		if (!bp || (bp->addr != addr))  in __get_buf()
117 			bp = NULL;  in __get_buf()
129 		bp = PTROF(segp[segment_ndx]);  in __get_buf()
134 	if (!bp) {  in __get_buf()
135 		bp = newbuf(hashp, addr, prev_bp);  in __get_buf()
136 		if (!bp ||  in __get_buf()
137 		    __get_page(hashp, bp->page, addr, !prev_bp, is_disk, 0))  in __get_buf()
141 			    (BUFHEAD *)((ptrdiff_t)bp | is_disk_mask);  in __get_buf()
143 		BUF_REMOVE(bp);  in __get_buf()
144 		MRU_INSERT(bp);  in __get_buf()
146 	return (bp);  in __get_buf()
158 	BUFHEAD *bp;		/* The buffer we're going to use */  in newbuf()  local
166 	bp = LRU;  in newbuf()
169         if (bp == hashp->cpage) {  in newbuf()
170                 BUF_REMOVE(bp);  in newbuf()
171                 MRU_INSERT(bp);  in newbuf()
172                 bp = LRU;  in newbuf()
176 	if (hashp->nbufs == 0 && prev_bp && bp->ovfl) {  in newbuf()
179 		for (ovfl = bp->ovfl; ovfl ; ovfl = ovfl->ovfl) {  in newbuf()
191 	if (hashp->nbufs || (bp->flags & BUF_PIN) || bp == hashp->cpage) {  in newbuf()
193 		if ((bp = (BUFHEAD *)calloc(1, sizeof(BUFHEAD))) == NULL)  in newbuf()
195 		if ((bp->page = (char *)calloc(1, hashp->BSIZE)) == NULL) {  in newbuf()
196 			free(bp);  in newbuf()
203 		BUF_REMOVE(bp);  in newbuf()
208 		if ((bp->addr != 0) || (bp->flags & BUF_BUCKET)) {  in newbuf()
213 			shortp = (u_int16_t *)bp->page;  in newbuf()
216 			if ((bp->flags & BUF_MOD) && __put_page(hashp, bp->page,  in newbuf()
217 			    bp->addr, (int)IS_BUCKET(bp->flags), 0))  in newbuf()
227 			if (IS_BUCKET(bp->flags)) {  in newbuf()
228 				segment_ndx = bp->addr & (hashp->SGSIZE - 1);  in newbuf()
229 				segp = hashp->dir[bp->addr >> hashp->SSHIFT];  in newbuf()
235 				    ((bp->flags & BUF_MOD) ||  in newbuf()
246 			for (xbp = bp; xbp->ovfl;) {  in newbuf()
272 	bp->addr = addr;  in newbuf()
275 	    bp->addr, (bp->ovfl ? bp->ovfl->addr : 0), 0);  in newbuf()
277 	bp->ovfl = NULL;  in newbuf()
286 		    (bp ? bp->addr : 0));  in newbuf()
288 		prev_bp->ovfl = bp;  in newbuf()
289 		bp->flags = 0;  in newbuf()
291 		bp->flags = BUF_BUCKET;  in newbuf()
292 	MRU_INSERT(bp);  in newbuf()
293 	return (bp);  in newbuf()
322 	BUFHEAD *bp;  in __buf_free()  local
327 	for (bp = LRU; bp != &hashp->bufhead;) {  in __buf_free()
329 		if (bp->addr || IS_BUCKET(bp->flags)) {  in __buf_free()
330 			if (to_disk && (bp->flags & BUF_MOD) &&  in __buf_free()
331 			    __put_page(hashp, bp->page,  in __buf_free()
332 			    bp->addr, IS_BUCKET(bp->flags), 0))  in __buf_free()
337 			if (bp->page) {  in __buf_free()
338 				(void)memset(bp->page, 0, hashp->BSIZE);  in __buf_free()
339 				free(bp->page);  in __buf_free()
341 			BUF_REMOVE(bp);  in __buf_free()
342 			free(bp);  in __buf_free()
343 			bp = LRU;  in __buf_free()
345 			bp = bp->prev;  in __buf_free()
351 __reclaim_buf(HTAB *hashp, BUFHEAD *bp)  in __reclaim_buf()  argument
353 	bp->ovfl = 0;  in __reclaim_buf()
354 	bp->addr = 0;  in __reclaim_buf()
355 	bp->flags = 0;  in __reclaim_buf()
356 	BUF_REMOVE(bp);  in __reclaim_buf()
357 	LRU_INSERT(bp);  in __reclaim_buf()