348  * On success devfs_populate_vp() returns with dmp->dm_lock held.
354 	struct devfs_mount *dmp;  in devfs_populate_vp()  local
359 	dmp = VFSTODEVFS(vp->v_mount);  in devfs_populate_vp()
360 	if (!devfs_populate_needed(dmp)) {  in devfs_populate_vp()
361 		sx_xlock(&dmp->dm_lock);  in devfs_populate_vp()
367 	sx_xlock(&dmp->dm_lock);  in devfs_populate_vp()
368 	DEVFS_DMP_HOLD(dmp);  in devfs_populate_vp()
372 	devfs_populate(dmp);  in devfs_populate_vp()
374 	sx_xunlock(&dmp->dm_lock);  in devfs_populate_vp()
376 	sx_xlock(&dmp->dm_lock);  in devfs_populate_vp()
377 	if (DEVFS_DMP_DROP(dmp)) {  in devfs_populate_vp()
378 		sx_xunlock(&dmp->dm_lock);  in devfs_populate_vp()
379 		devfs_unmount_final(dmp);  in devfs_populate_vp()
384 		sx_xunlock(&dmp->dm_lock);  in devfs_populate_vp()
391 		sx_xunlock(&dmp->dm_lock);  in devfs_populate_vp()
403 	struct devfs_mount *dmp;  in devfs_vptocnp()  local
409 	dmp = VFSTODEVFS(vp->v_mount);  in devfs_vptocnp()
421 	if (vp->v_type == VDIR && dd == dmp->dm_rootdir) {  in devfs_vptocnp()
454 	sx_xunlock(&dmp->dm_lock);  in devfs_vptocnp()
463 devfs_fqpn(char *buf, struct devfs_mount *dmp, struct devfs_dirent *dd,  in devfs_fqpn()  argument
469 	sx_assert(&dmp->dm_lock, SA_LOCKED);  in devfs_fqpn()
480 	while (de != dmp->dm_rootdir) {  in devfs_fqpn()
500 devfs_allocv_drop_refs(int drop_dm_lock, struct devfs_mount *dmp,  in devfs_allocv_drop_refs()  argument
512 	if (DEVFS_DMP_DROP(dmp)) {  in devfs_allocv_drop_refs()
516 		sx_xunlock(&dmp->dm_lock);  in devfs_allocv_drop_refs()
517 		devfs_unmount_final(dmp);  in devfs_allocv_drop_refs()
520 		sx_unlock(&dmp->dm_lock);  in devfs_allocv_drop_refs()
525  * devfs_allocv shall be entered with dmp->dm_lock held, and it drops
535 	struct devfs_mount *dmp;  in devfs_allocv()  local
539 	dmp = VFSTODEVFS(mp);  in devfs_allocv()
541 		sx_xunlock(&dmp->dm_lock);  in devfs_allocv()
546 	DEVFS_DMP_HOLD(dmp);  in devfs_allocv()
552 		sx_xunlock(&dmp->dm_lock);  in devfs_allocv()
554 		sx_xlock(&dmp->dm_lock);  in devfs_allocv()
555 		if (devfs_allocv_drop_refs(0, dmp, de)) {  in devfs_allocv()
568 		sx_xunlock(&dmp->dm_lock);  in devfs_allocv()
575 			devfs_allocv_drop_refs(1, dmp, de);  in devfs_allocv()
584 		devfs_allocv_drop_refs(1, dmp, de);  in devfs_allocv()
627 		(void) devfs_allocv_drop_refs(1, dmp, de);  in devfs_allocv()
630 	if (devfs_allocv_drop_refs(0, dmp, de)) {  in devfs_allocv()
638 	sx_xunlock(&dmp->dm_lock);  in devfs_allocv()
803 	struct devfs_mount *dmp;  in devfs_getattr()  local
812 	dmp = VFSTODEVFS(vp->v_mount);  in devfs_getattr()
813 	sx_xunlock(&dmp->dm_lock);  in devfs_getattr()
1048 	struct devfs_mount *dmp;  in devfs_lookupx()  local
1062 	dmp = VFSTODEVFS(mp);  in devfs_lookupx()
1113 		pname = devfs_fqpn(specname, dmp, dd, cnp);  in devfs_lookupx()
1118 		DEVFS_DMP_HOLD(dmp);  in devfs_lookupx()
1119 		sx_xunlock(&dmp->dm_lock);  in devfs_lookupx()
1124 			sx_xlock(&dmp->dm_lock);  in devfs_lookupx()
1127 			sx_xlock(&dmp->dm_lock);  in devfs_lookupx()
1128 			if (DEVFS_DMP_DROP(dmp)) {  in devfs_lookupx()
1129 				sx_xunlock(&dmp->dm_lock);  in devfs_lookupx()
1130 				devfs_unmount_final(dmp);  in devfs_lookupx()
1132 				sx_xunlock(&dmp->dm_lock);  in devfs_lookupx()
1136 		if (DEVFS_DMP_DROP(dmp)) {  in devfs_lookupx()
1138 			sx_xunlock(&dmp->dm_lock);  in devfs_lookupx()
1139 			devfs_unmount_final(dmp);  in devfs_lookupx()
1149 		dde = &cdev2priv(cdev)->cdp_dirents[dmp->dm_idx];  in devfs_lookupx()
1187 	struct devfs_mount *dmp;  in devfs_lookup()  local
1193 	dmp = VFSTODEVFS(ap->a_dvp->v_mount);  in devfs_lookup()
1197 		sx_xunlock(&dmp->dm_lock);  in devfs_lookup()
1207 	struct devfs_mount *dmp;  in devfs_mknod()  local
1217 	dmp = VFSTODEVFS(dvp->v_mount);  in devfs_mknod()
1224 	sx_xlock(&dmp->dm_lock);  in devfs_mknod()
1244 	sx_xunlock(&dmp->dm_lock);  in devfs_mknod()
1450 	struct devfs_mount *dmp;  in devfs_readdir()  local
1476 	dmp = VFSTODEVFS(ap->a_vp->v_mount);  in devfs_readdir()
1509 	sx_xunlock(&dmp->dm_lock);  in devfs_readdir()
1588 	struct devfs_mount *dmp = VFSTODEVFS(vp->v_mount);  in devfs_remove()  local
1593 	sx_xlock(&dmp->dm_lock);  in devfs_remove()
1608 		devfs_delete(dmp, de, 0);  in devfs_remove()
1609 		sx_xunlock(&dmp->dm_lock);  in devfs_remove()
1615 		sx_xunlock(&dmp->dm_lock);  in devfs_remove()
1702 	struct devfs_mount *dmp;  in devfs_rioctl()  local
1711 	dmp = VFSTODEVFS(vp->v_mount);  in devfs_rioctl()
1712 	sx_xlock(&dmp->dm_lock);  in devfs_rioctl()
1714 	DEVFS_DMP_HOLD(dmp);  in devfs_rioctl()
1715 	devfs_populate(dmp);  in devfs_rioctl()
1716 	if (DEVFS_DMP_DROP(dmp)) {  in devfs_rioctl()
1717 		sx_xunlock(&dmp->dm_lock);  in devfs_rioctl()
1718 		devfs_unmount_final(dmp);  in devfs_rioctl()
1721 	error = devfs_rules_ioctl(dmp, ap->a_command, ap->a_data, ap->a_td);  in devfs_rioctl()
1722 	sx_xunlock(&dmp->dm_lock);  in devfs_rioctl()
1861 	struct devfs_mount *dmp;  in devfs_symlink()  local
1866 	dmp = VFSTODEVFS(ap->a_dvp->v_mount);  in devfs_symlink()
1883 	mac_devfs_create_symlink(ap->a_cnp->cn_cred, dmp->dm_mount, dd, de);  in devfs_symlink()
1889 			devfs_delete(dmp, de, DEVFS_DEL_NORECURSE);  in devfs_symlink()
1890 			sx_xunlock(&dmp->dm_lock);  in devfs_symlink()
1901 	devfs_dir_ref_de(dmp, dd);  in devfs_symlink()
1902 	devfs_rules_apply(dmp, de);  in devfs_symlink()