sys/vm/swap_pager.c

369 static void	swap_pager_swapoff(struct swdevt *sp);
400 static int	swapoff_one(struct swdevt *sp, struct ucred *cred);
712 	struct swdevt *sp;
717 	sp = swdevhd;
719 		if (sp == NULL)
720 			sp = TAILQ_FIRST(&swtailq);
721 		if (!(sp->sw_flags & SW_CLOSING)) {
722 			blk = blist_alloc(sp->sw_blist, npages);
724 				blk += sp->sw_first;
725 				sp->sw_used += npages;
728 				swdevhd = TAILQ_NEXT(sp, sw_list);
732 		sp = TAILQ_NEXT(sp, sw_list);
746 swp_pager_isondev(daddr_t blk, struct swdevt *sp)
749 	return (blk >= sp->sw_first && blk < sp->sw_end);
755 	struct swdevt *sp;
758 	TAILQ_FOREACH(sp, &swtailq, sw_list) {
759 		if (bp->b_blkno >= sp->sw_first && bp->b_blkno < sp->sw_end) {
761 			if ((sp->sw_flags & SW_UNMAPPED) != 0 &&
769 			sp->sw_strategy(bp, sp);
787 	struct swdevt *sp;
790 	TAILQ_FOREACH(sp, &swtailq, sw_list) {
791 		if (blk >= sp->sw_first && blk < sp->sw_end) {
792 			sp->sw_used -= npages;
798 			if ((sp->sw_flags & SW_CLOSING) == 0) {
799 				blist_free(sp->sw_blist, blk - sp->sw_first,
1582 swap_pager_isswapped(vm_object_t object, struct swdevt *sp)
1598 				if (swp_pager_isondev(swap->swb_pages[i], sp)) {
1664 swap_pager_swapoff(struct swdevt *sp)
1680 				if (swp_pager_isondev(swap->swb_pages[j], sp)) {
1697 	if (sp->sw_used) {
1707 			    sp->sw_used);
2069 	struct swdevt *sp, *tsp;
2094 	sp = malloc(sizeof *sp, M_VMPGDATA, M_WAITOK | M_ZERO);
2095 	sp->sw_vp = vp;
2096 	sp->sw_id = id;
2097 	sp->sw_dev = dev;
2098 	sp->sw_flags = 0;
2099 	sp->sw_nblks = nblks;
2100 	sp->sw_used = 0;
2101 	sp->sw_strategy = strategy;
2102 	sp->sw_close = close;
2103 	sp->sw_flags = flags;
2105 	sp->sw_blist = blist_create(nblks, M_WAITOK);
2110 	blist_free(sp->sw_blist, 2, nblks - 2);
2124 	sp->sw_first = dvbase;
2125 	sp->sw_end = dvbase + nblks;
2126 	TAILQ_INSERT_TAIL(&swtailq, sp, sw_list);
2159 	struct swdevt *sp;
2177 	TAILQ_FOREACH(sp, &swtailq, sw_list) {
2178 		if (sp->sw_vp == vp)
2182 	if (sp == NULL) {
2186 	error = swapoff_one(sp, td->td_ucred);
2193 swapoff_one(struct swdevt *sp, struct ucred *cred)
2202 	(void) vn_lock(sp->sw_vp, LK_EXCLUSIVE | LK_RETRY);
2203 	error = mac_system_check_swapoff(cred, sp->sw_vp);
2204 	(void) VOP_UNLOCK(sp->sw_vp, 0);
2208 	nblks = sp->sw_nblks;
2225 	sp->sw_flags |= SW_CLOSING;
2226 	for (dvbase = 0; dvbase < sp->sw_end; dvbase += dmmax) {
2227 		swap_pager_avail -= blist_fill(sp->sw_blist,
2236 	swap_pager_swapoff(sp);
2238 	sp->sw_close(curthread, sp);
2240 	sp->sw_id = NULL;
2241 	TAILQ_REMOVE(&swtailq, sp, sw_list);
2247 	if (swdevhd == sp)
2250 	blist_destroy(sp->sw_blist);
2251 	free(sp, M_VMPGDATA);
2258 	struct swdevt *sp, *spt;
2265 	TAILQ_FOREACH_SAFE(sp, &swtailq, sw_list, spt) {
2267 		if (vn_isdisk(sp->sw_vp, NULL))
2268 			devname = devtoname(sp->sw_vp->v_rdev);
2271 		error = swapoff_one(sp, thread0.td_ucred);
2288 	struct swdevt *sp;
2293 	TAILQ_FOREACH(sp, &swtailq, sw_list) {
2294 		*total += sp->sw_nblks;
2295 		*used += sp->sw_used;
2303 	struct swdevt *sp;
2310 	TAILQ_FOREACH(sp, &swtailq, sw_list) {
2316 		xs->xsw_dev = sp->sw_dev;
2317 		xs->xsw_flags = sp->sw_flags;
2318 		xs->xsw_nblks = sp->sw_nblks;
2319 		xs->xsw_used = sp->sw_used;
2321 			if (vn_isdisk(sp->sw_vp, NULL))
2322 				tmp_devname = devtoname(sp->sw_vp->v_rdev);
2439 swapgeom_release(struct g_consumer *cp, struct swdevt *sp)
2446 			sp->sw_id = NULL;
2453 	struct swdevt *sp;
2465 	sp = bp2->bio_caller1;
2467 	swapgeom_release(cp, sp);
2473 swapgeom_strategy(struct buf *bp, struct swdevt *sp)
2479 	cp = sp->sw_id;
2495 		swapgeom_release(cp, sp);
2503 	bio->bio_caller1 = sp;
2506 	bio->bio_offset = (bp->b_blkno - sp->sw_first) * PAGE_SIZE;
2526 	struct swdevt *sp;
2530 	TAILQ_FOREACH(sp, &swtailq, sw_list) {
2531 		if (sp->sw_id == cp) {
2532 			sp->sw_flags |= SW_CLOSING;
2542 	destroy = ((sp != NULL) && (cp->index == 0));
2544 		sp->sw_id = NULL;
2575 	struct swdevt *sp;
2583 	TAILQ_FOREACH(sp, &swtailq, sw_list) {
2584 		cp = sp->sw_id;
2642 swapdev_strategy(struct buf *bp, struct swdevt *sp)
2646 	bp->b_blkno = ctodb(bp->b_blkno - sp->sw_first);
2648 	vp2 = sp->sw_id;
2664 swapdev_close(struct thread *td, struct swdevt *sp)
2667 	VOP_CLOSE(sp->sw_vp, FREAD | FWRITE, td->td_ucred, td);
2668 	vrele(sp->sw_vp);
2675 	struct swdevt *sp;
2681 	TAILQ_FOREACH(sp, &swtailq, sw_list) {
2682 		if (sp->sw_id == vp) {