359  * On success devfs_populate_vp() returns with dmp->dm_lock held.
365 	struct devfs_mount *dmp;  in devfs_populate_vp()  local
373 	dmp = VFSTODEVFS(vp->v_mount);  in devfs_populate_vp()
374 	if (!devfs_populate_needed(dmp)) {  in devfs_populate_vp()
375 		sx_xlock(&dmp->dm_lock);  in devfs_populate_vp()
381 	sx_xlock(&dmp->dm_lock);  in devfs_populate_vp()
382 	DEVFS_DMP_HOLD(dmp);  in devfs_populate_vp()
386 	devfs_populate(dmp);  in devfs_populate_vp()
388 	sx_xunlock(&dmp->dm_lock);  in devfs_populate_vp()
390 	sx_xlock(&dmp->dm_lock);  in devfs_populate_vp()
391 	if (DEVFS_DMP_DROP(dmp)) {  in devfs_populate_vp()
392 		sx_xunlock(&dmp->dm_lock);  in devfs_populate_vp()
393 		devfs_unmount_final(dmp);  in devfs_populate_vp()
398 		sx_xunlock(&dmp->dm_lock);  in devfs_populate_vp()
405 		sx_xunlock(&dmp->dm_lock);  in devfs_populate_vp()
417 	struct devfs_mount *dmp;  in devfs_vptocnp()  local
423 	dmp = VFSTODEVFS(vp->v_mount);  in devfs_vptocnp()
435 	if (vp->v_type == VDIR && dd == dmp->dm_rootdir) {  in devfs_vptocnp()
468 	sx_xunlock(&dmp->dm_lock);  in devfs_vptocnp()
477 devfs_fqpn(char *buf, struct devfs_mount *dmp, struct devfs_dirent *dd,  in devfs_fqpn()  argument
483 	sx_assert(&dmp->dm_lock, SA_LOCKED);  in devfs_fqpn()
494 	while (de != dmp->dm_rootdir) {  in devfs_fqpn()
514 devfs_allocv_drop_refs(int drop_dm_lock, struct devfs_mount *dmp,  in devfs_allocv_drop_refs()  argument
526 	if (DEVFS_DMP_DROP(dmp)) {  in devfs_allocv_drop_refs()
530 		sx_xunlock(&dmp->dm_lock);  in devfs_allocv_drop_refs()
531 		devfs_unmount_final(dmp);  in devfs_allocv_drop_refs()
534 		sx_unlock(&dmp->dm_lock);  in devfs_allocv_drop_refs()
539  * devfs_allocv shall be entered with dmp->dm_lock held, and it drops
549 	struct devfs_mount *dmp;  in devfs_allocv()  local
553 	dmp = VFSTODEVFS(mp);  in devfs_allocv()
555 		sx_xunlock(&dmp->dm_lock);  in devfs_allocv()
560 	DEVFS_DMP_HOLD(dmp);  in devfs_allocv()
566 		sx_xunlock(&dmp->dm_lock);  in devfs_allocv()
568 		sx_xlock(&dmp->dm_lock);  in devfs_allocv()
569 		if (devfs_allocv_drop_refs(0, dmp, de)) {  in devfs_allocv()
582 		sx_xunlock(&dmp->dm_lock);  in devfs_allocv()
589 			devfs_allocv_drop_refs(1, dmp, de);  in devfs_allocv()
598 		devfs_allocv_drop_refs(1, dmp, de);  in devfs_allocv()
641 		(void) devfs_allocv_drop_refs(1, dmp, de);  in devfs_allocv()
644 	if (devfs_allocv_drop_refs(0, dmp, de)) {  in devfs_allocv()
652 	sx_xunlock(&dmp->dm_lock);  in devfs_allocv()
817 	struct devfs_mount *dmp;  in devfs_getattr()  local
826 	dmp = VFSTODEVFS(vp->v_mount);  in devfs_getattr()
827 	sx_xunlock(&dmp->dm_lock);  in devfs_getattr()
1062 	struct devfs_mount *dmp;  in devfs_lookupx()  local
1076 	dmp = VFSTODEVFS(mp);  in devfs_lookupx()
1127 		pname = devfs_fqpn(specname, dmp, dd, cnp);  in devfs_lookupx()
1132 		DEVFS_DMP_HOLD(dmp);  in devfs_lookupx()
1133 		sx_xunlock(&dmp->dm_lock);  in devfs_lookupx()
1155 			sx_xlock(&dmp->dm_lock);  in devfs_lookupx()
1158 			sx_xlock(&dmp->dm_lock);  in devfs_lookupx()
1159 			if (DEVFS_DMP_DROP(dmp)) {  in devfs_lookupx()
1160 				sx_xunlock(&dmp->dm_lock);  in devfs_lookupx()
1161 				devfs_unmount_final(dmp);  in devfs_lookupx()
1163 				sx_xunlock(&dmp->dm_lock);  in devfs_lookupx()
1167 		if (DEVFS_DMP_DROP(dmp)) {  in devfs_lookupx()
1169 			sx_xunlock(&dmp->dm_lock);  in devfs_lookupx()
1170 			devfs_unmount_final(dmp);  in devfs_lookupx()
1180 		dde = &cdev2priv(cdev)->cdp_dirents[dmp->dm_idx];  in devfs_lookupx()
1218 	struct devfs_mount *dmp;  in devfs_lookup()  local
1224 	dmp = VFSTODEVFS(ap->a_dvp->v_mount);  in devfs_lookup()
1228 		sx_xunlock(&dmp->dm_lock);  in devfs_lookup()
1238 	struct devfs_mount *dmp;  in devfs_mknod()  local
1248 	dmp = VFSTODEVFS(dvp->v_mount);  in devfs_mknod()
1255 	sx_xlock(&dmp->dm_lock);  in devfs_mknod()
1275 	sx_xunlock(&dmp->dm_lock);  in devfs_mknod()
1481 	struct devfs_mount *dmp;  in devfs_readdir()  local
1508 	dmp = VFSTODEVFS(ap->a_vp->v_mount);  in devfs_readdir()
1547 	sx_xunlock(&dmp->dm_lock);  in devfs_readdir()
1628 	struct devfs_mount *dmp = VFSTODEVFS(vp->v_mount);  in devfs_remove()  local
1633 	sx_xlock(&dmp->dm_lock);  in devfs_remove()
1648 		devfs_delete(dmp, de, 0);  in devfs_remove()
1649 		sx_xunlock(&dmp->dm_lock);  in devfs_remove()
1655 		sx_xunlock(&dmp->dm_lock);  in devfs_remove()
1742 	struct devfs_mount *dmp;  in devfs_rioctl()  local
1751 	dmp = VFSTODEVFS(vp->v_mount);  in devfs_rioctl()
1752 	sx_xlock(&dmp->dm_lock);  in devfs_rioctl()
1754 	DEVFS_DMP_HOLD(dmp);  in devfs_rioctl()
1755 	devfs_populate(dmp);  in devfs_rioctl()
1756 	if (DEVFS_DMP_DROP(dmp)) {  in devfs_rioctl()
1757 		sx_xunlock(&dmp->dm_lock);  in devfs_rioctl()
1758 		devfs_unmount_final(dmp);  in devfs_rioctl()
1761 	error = devfs_rules_ioctl(dmp, ap->a_command, ap->a_data, ap->a_td);  in devfs_rioctl()
1762 	sx_xunlock(&dmp->dm_lock);  in devfs_rioctl()
1901 	struct devfs_mount *dmp;  in devfs_symlink()  local
1906 	dmp = VFSTODEVFS(ap->a_dvp->v_mount);  in devfs_symlink()
1923 	mac_devfs_create_symlink(ap->a_cnp->cn_cred, dmp->dm_mount, dd, de);  in devfs_symlink()
1929 			devfs_delete(dmp, de, DEVFS_DEL_NORECURSE);  in devfs_symlink()
1930 			sx_xunlock(&dmp->dm_lock);  in devfs_symlink()
1941 	devfs_dir_ref_de(dmp, dd);  in devfs_symlink()
1942 	devfs_rules_apply(dmp, de);  in devfs_symlink()