431 typedef struct dumpbuf {  struct
442 dumpbuf_t dumpbuf;		/* I/O buffer */  variable
485 	char *old_buf = dumpbuf.start;  in dumpbuf_resize()
486 	size_t old_size = dumpbuf.size;  in dumpbuf_resize()
492 	new_size = dumpbuf_iosize(MAX(dumpbuf.iosize, maxphys));  in dumpbuf_resize()
497 	dumpbuf.size = new_size;  in dumpbuf_resize()
498 	dumpbuf.start = new_buf;  in dumpbuf_resize()
499 	dumpbuf.end = new_buf + new_size;  in dumpbuf_resize()
618 	if (dumpbuf.iosize >= DUMP_1MB)  in dump_update_clevel()
620 	else if (dumpbuf.iosize >= (256 * DUMP_1KB))  in dump_update_clevel()
1128 		dumpbuf.size = dumpbuf_iosize(maxphys);  in dumphdr_init()
1129 		dumpbuf.start = kmem_alloc(dumpbuf.size, KM_SLEEP);  in dumphdr_init()
1130 		dumpbuf.end = dumpbuf.start + dumpbuf.size;  in dumphdr_init()
1223 	dumpbuf.iosize = 0;  in dumpinit()
1247 				dumpbuf.iosize = dki.dki_maxtransfer * blk_size;  in dumpinit()
1323 	size_t size = P2ROUNDUP(dumpbuf.cur - dumpbuf.start, PAGESIZE);  in dumpvp_flush()
1327 	if (dumpbuf.vp_off + size > dumpbuf.vp_limit) {  in dumpvp_flush()
1329 		dumpbuf.vp_off = dumpbuf.vp_limit;  in dumpvp_flush()
1334 			err = VOP_DUMP(dumpvp, dumpbuf.start,  in dumpvp_flush()
1335 			    lbtodb(dumpbuf.vp_off), btod(size), NULL);  in dumpvp_flush()
1337 			err = vn_rdwr(UIO_WRITE, dumpbuf.cdev_vp != NULL ?  in dumpvp_flush()
1338 			    dumpbuf.cdev_vp : dumpvp, dumpbuf.start, size,  in dumpvp_flush()
1339 			    dumpbuf.vp_off, UIO_SYSSPACE, 0, dumpbuf.vp_limit,  in dumpvp_flush()
1346 		dumpbuf.vp_off += size;  in dumpvp_flush()
1348 	dumpbuf.cur = dumpbuf.start;  in dumpvp_flush()
1350 	return (dumpbuf.vp_off);  in dumpvp_flush()
1360 		len = MIN(size, dumpbuf.end - dumpbuf.cur);  in dumpvp_write()
1362 			off = P2PHASE(dumpbuf.vp_off, dumpbuf.size);  in dumpvp_write()
1363 			if (off == 0 || !ISP2(dumpbuf.size)) {  in dumpvp_write()
1366 				sz = dumpbuf.size - off;  in dumpvp_write()
1367 				dumpbuf.cur = dumpbuf.start + sz;  in dumpvp_write()
1369 				ovbcopy(dumpbuf.start + sz, dumpbuf.start, off);  in dumpvp_write()
1370 				dumpbuf.cur += off;  in dumpvp_write()
1373 			bcopy(va, dumpbuf.cur, len);  in dumpvp_write()
1375 			dumpbuf.cur += len;  in dumpvp_write()
1495 	dumpbuf.cur = dumpbuf.start;  in dump_summary()
1497 	dumpbuf.vp_limit = dumpvp_size - (DUMP_OFFSET + DUMP_LOGSIZE +  in dump_summary()
1499 	dumpvp_start = dumpbuf.vp_limit - DUMP_SUMMARYSIZE;  in dump_summary()
1500 	dumpbuf.vp_off = dumpvp_start;  in dump_summary()
1521 	dumpbuf.cur = dumpbuf.start;  in dump_ereports()
1522 	dumpbuf.vp_limit = dumpvp_size - (DUMP_OFFSET + DUMP_LOGSIZE);  in dump_ereports()
1523 	dumpvp_start = dumpbuf.vp_limit - DUMP_ERPTSIZE;  in dump_ereports()
1524 	dumpbuf.vp_off = dumpvp_start;  in dump_ereports()
1536 		    (size_t)(dumpbuf.vp_off - dumpvp_start),  in dump_ereports()
1552 	dumpbuf.cur = dumpbuf.start;  in dump_messages()
1553 	dumpbuf.vp_limit = dumpvp_size - DUMP_OFFSET;  in dump_messages()
1554 	dumpvp_start = dumpbuf.vp_limit - DUMP_LOGSIZE;  in dump_messages()
1555 	dumpbuf.vp_off = dumpvp_start;  in dump_messages()
1579 		    (size_t)(dumpbuf.vp_off - dumpvp_start),  in dump_messages()
2621 	P("dumpbuf.iosize,%ld\n", dumpbuf.iosize);  in dumpsys_metrics()
2622 	P("dumpbuf.size,%ld\n", dumpbuf.size);  in dumpsys_metrics()
2691 	dumpbuf.cur = dumpbuf.start;  in dumpsys()
2744 		ASSERT(dumpbuf.cdev_vp == NULL);  in dumpsys()
2753 				dumpbuf.cdev_vp = cmn_cdev_vp;  in dumpsys()
2769 	dumpbuf.vp_limit = dumpvp_size - DUMP_LOGSIZE - DUMP_OFFSET -  in dumpsys()
2776 	dumpbuf.vp_off = dumphdr->dump_ksyms = dumphdr->dump_start + PAGESIZE;  in dumpsys()
3000 	dumpbuf.vp_off = dumphdr->dump_start;  in dumpsys()
3004 	dumpbuf.vp_limit = dumpvp_size;  in dumpsys()
3005 	dumpbuf.vp_off = dumpbuf.vp_limit - DUMP_OFFSET;  in dumpsys()
3044 		if (dumpbuf.cdev_vp != NULL) {  in dumpsys()
3045 			(void) VOP_CLOSE(dumpbuf.cdev_vp, FREAD | FWRITE, 1, 0,  in dumpsys()
3047 			VN_RELE(dumpbuf.cdev_vp);  in dumpsys()
3048 			dumpbuf.cdev_vp = NULL;  in dumpsys()