miscfs/devfs/devfs_tree.c

290 	devnode_t *	dnp = NULL;
337 		dnp = dirent_p->de_dnp;
338 		if (dnp->dn_type != DEV_DIR) {
352 		dnp = dirent_p->de_dnp;
357 		    dnp, fullpath);
361 	    dirnode = dnp; /* continue relative to this directory */
378     devnode_t * dnp, devdirent_t * *dirent_pp)
407 	if(dirnode && ( dnp->dn_dvm == NULL)) {
408 		dnp->dn_dvm = dirnode->dn_dvm;
409 		/* if(!dnp->dn_dvm) printf("parent had null dvm "); */
417 	dirent_p->de_dnp = dnp;
418 	dnp->dn_links++ ; /* implicit from our own name-node */
424 	if(dnp->dn_linklist) {
425 		dirent_p->de_nextlink = dnp->dn_linklist;
433 	dnp->dn_linklist = dirent_p;
440 	if(dnp->dn_type == DEV_DIR) {
441 		dnp->dn_typeinfo.Dir.myname = dirent_p;
448 		if(dnp->dn_typeinfo.Dir.parent) {
449 			dnp->dn_typeinfo.Dir.parent->dn_links--;
452 			dnp->dn_typeinfo.Dir.parent = dirnode;
454 			dnp->dn_typeinfo.Dir.parent = dnp;
456 		dnp->dn_typeinfo.Dir.parent->dn_links++; /* account for the new '..' */
509 	devnode_t *	dnp = NULL;
517 		dnp = proto->dn_nextsibling;
518 		while( dnp != proto) {
519 			if (dnp->dn_dvm == dvm) {
520 				*dn_pp = dnp;
523 			dnp = dnp->dn_nextsibling;
538 	MALLOC(dnp, devnode_t *, sizeof(devnode_t), M_DEVFSNODE, M_WAITOK);
539 	if (!dnp) {
548 		bcopy(proto, dnp, sizeof(devnode_t));
549 		dnp->dn_links = 0;
550 		dnp->dn_linklist = NULL;
551 		dnp->dn_vn = NULL;
552 		dnp->dn_len = 0;
554 		dnp->dn_prevsiblingp = proto->dn_prevsiblingp;
555 		*(dnp->dn_prevsiblingp) = dnp;
556 		dnp->dn_nextsibling = proto;
557 		proto->dn_prevsiblingp = &(dnp->dn_nextsibling);
559 		mac_devfs_label_init(dnp);
560 		mac_devfs_label_copy(proto->dn_label, dnp->dn_label);
569 		bzero(dnp, sizeof(devnode_t));
570 		dnp->dn_type = entrytype;
571 		dnp->dn_nextsibling = dnp;
572 		dnp->dn_prevsiblingp = &(dnp->dn_nextsibling);
573 		dnp->dn_atime.tv_sec = tv.tv_sec;
574 		dnp->dn_mtime.tv_sec = tv.tv_sec;
575 		dnp->dn_ctime.tv_sec = tv.tv_sec;
577 		mac_devfs_label_init(dnp);
580 	dnp->dn_dvm = dvm;
581 	dnp->dn_refcount = 0;
582 	dnp->dn_ino = devfs_unique_fileno;
594 		dnp->dn_typeinfo.Dir.dirlast = &(dnp->dn_typeinfo.Dir.dirlist);
595 		dnp->dn_typeinfo.Dir.dirlist = (devdirent_t *)0;
596 		dnp->dn_typeinfo.Dir.entrycount = 0;
598 		dnp->dn_typeinfo.Dir.parent = NULL;
599 		dnp->dn_links++; /* for .*/
600 		dnp->dn_typeinfo.Dir.myname = NULL;
605 		dnp->dn_ops = &devfs_vnodeop_p;
606 		dnp->dn_mode |= 0555;	/* default perms */
617 	    	MALLOC(dnp->dn_typeinfo.Slnk.name, char *,
620 		if (!dnp->dn_typeinfo.Slnk.name) {
621 		    	FREE(dnp,M_DEVFSNODE);
624 		strlcpy(dnp->dn_typeinfo.Slnk.name, typeinfo->Slnk.name,
626 		dnp->dn_typeinfo.Slnk.namelen = typeinfo->Slnk.namelen;
627 		DEVFS_INCR_STRINGSPACE(dnp->dn_typeinfo.Slnk.namelen + 1);
628 		dnp->dn_ops = &devfs_vnodeop_p;
629 		dnp->dn_mode |= 0555;	/* default perms */
637 		dnp->dn_ops = &devfs_spec_vnodeop_p;
638 		dnp->dn_typeinfo.dev = typeinfo->dev;
644 		dnp->dn_ops = &devfs_devfd_vnodeop_p;
645 		dnp->dn_mode |= 0555;	/* default perms */
653 	*dn_pp = dnp;
663 devnode_free(devnode_t * dnp)
666 	mac_devfs_label_destroy(dnp);
668     if (dnp->dn_type == DEV_SLNK) {
669         DEVFS_DECR_STRINGSPACE(dnp->dn_typeinfo.Slnk.namelen + 1);
670 	FREE(dnp->dn_typeinfo.Slnk.name, M_DEVFSNODE);
673     FREE(dnp, M_DEVFSNODE);
681 devfs_dn_free(devnode_t * dnp)
683 	if(--dnp->dn_links <= 0 ) /* can be -1 for initial free, on error */
686 		if (dnp->dn_nextsibling != dnp) {
687 			devnode_t * * 	prevp = dnp->dn_prevsiblingp;
688 			*prevp = dnp->dn_nextsibling;
689 			dnp->dn_nextsibling->dn_prevsiblingp = prevp;
694 		if (dnp->dn_refcount == 0) {
695 		    devnode_free(dnp);
698 		    dnp->dn_lflags |= DN_DELETE;
727 	devnode_t *	dnp = child->de_dnp;
733 	events = (dnp->dn_type == DEV_DIR ? VNODE_EVENT_DIR_CREATED : VNODE_EVENT_FILE_CREATED);
751 					   NULL, dnp, adnp->dn_dvm,
775 remove_notify_count(devnode_t *dnp)
785 	notify_count += dnp->dn_links;
786 	for (dnp2 = dnp->dn_nextsibling; dnp2 != dnp; dnp2 = dnp2->dn_nextsibling) {
807 	devnode_t * dnp = ((devdirent_t *)dirent_p)->de_dnp;
823 	log_count = remove_notify_count(dnp);
835 		new_count = remove_notify_count(dnp);
851 		devfs_record_event(&event_log, dnp, VNODE_EVENT_DELETE);
855 	while ((dnp2 = dnp->dn_nextsibling) != dnp) {
860 		dnp->dn_nextsibling = dnp2->dn_nextsibling;
861 		dnp->dn_nextsibling->dn_prevsiblingp = &(dnp->dn_nextsibling);
887 	if (dnp->dn_linklist) {
889 			lastlink = (1 == dnp->dn_links);
892 				devfs_record_event(&event_log, dnp->dn_linklist->de_parent, VNODE_EVENT_FILE_REMOVED);
894 			dev_free_name(dnp->dn_linklist);
974 	devnode_t *	dnp = back->de_dnp;
975 	int type = dnp->dn_type;
982 				NULL, dnp,
1021  * can handle if there is no dnp
1030 	devnode_t *	dnp = dirent_p->de_dnp;
1032 	if(dnp) {
1033 		if(dnp->dn_type == DEV_DIR)
1037 			if(dnp->dn_typeinfo.Dir.dirlist)
1039 			p = dnp->dn_typeinfo.Dir.parent;
1040 			devfs_dn_free(dnp); 	/* account for '.' */
1050 				dnp->dn_linklist = NULL;
1052 			if(dnp->dn_linklist == dirent_p) {
1053 				dnp->dn_linklist = dirent_p->de_nextlink;
1056 		devfs_dn_free(dnp);
1090  * can handle if there is no dnp
1099 	devnode_t *	dnp = dirent_p->de_dnp;
1101 	if(dnp) {
1102 		if(dnp->dn_type == DEV_DIR)
1104 			while(dnp->dn_typeinfo.Dir.dirlist)
1106 				dev_free_hier(dnp->dn_typeinfo.Dir.dirlist);
1107 				dev_free_name(dnp->dn_typeinfo.Dir.dirlist);
1120  * If an error is returned, then the dnp may have been freed (we
1125 devfs_dntovn(devnode_t * dnp, struct vnode **vn_pp, __unused struct proc * p)
1141 	if (dnp->dn_lflags & DN_DELETE) {
1145 	devfs_ref_node(dnp);
1149 	vn_p = dnp->dn_vn;
1162 		if (dnp->dn_lflags & DN_DELETE) {
1195 	if (dnp->dn_lflags & DN_CREATE) {
1196 		dnp->dn_lflags |= DN_CREATEWAIT;
1197 		msleep(&dnp->dn_lflags, &devfs_mutex, PRIBIO, 0 , 0);
1201 	dnp->dn_lflags |= DN_CREATE;
1203 	switch (dnp->dn_type) {
1208 			if (dnp->dn_typeinfo.Dir.parent == dnp) {
1215 		    	vtype = (dnp->dn_type == DEV_BDEV) ? VBLK : VCHR;
1223 	vfsp.vnfs_mp = dnp->dn_dvm->mount;
1227 	vfsp.vnfs_fsnode = dnp;
1229 	vfsp.vnfs_vops = *(dnp->dn_ops);
1237 		if (dnp->dn_clone != NULL) {
1238 			int	n_major = major(dnp->dn_typeinfo.dev);
1240 			n_minor = (*dnp->dn_clone)(dnp->dn_typeinfo.dev, DEVFS_CLONE_ALLOC);
1248 		vfsp.vnfs_rdev = dnp->dn_typeinfo.dev;
1273 			if ((dnp->dn_clone != NULL) && (dnp->dn_vn != NULLVP) )
1284 			devfs_ref_node(dnp);
1290 			if (dnp->dn_clone == NULL) {
1291 				dnp->dn_vn = vn_p;
1303 		 (void)(*dnp->dn_clone)(dnp->dn_typeinfo.dev, DEVFS_CLONE_FREE);
1306 	dnp->dn_lflags &= ~DN_CREATE;
1307 	if (dnp->dn_lflags & DN_CREATEWAIT) {
1308 		dnp->dn_lflags &= ~DN_CREATEWAIT;
1309 		wakeup(&dnp->dn_lflags);
1318 	devfs_rele_node(dnp);
1328 devfs_ref_node(devnode_t *dnp)
1330 	dnp->dn_refcount++;
1338 devfs_rele_node(devnode_t *dnp)
1340 	dnp->dn_refcount--;
1341 	if (dnp->dn_refcount < 0) {
1343 	} else if ((dnp->dn_refcount == 0) && (dnp->dn_lflags & DN_DELETE))  {
1344 		devnode_free(dnp);
1359 	devnode_t *	dnp;
1362 	if ((error = dev_add_node(type, typeinfo, proto, &dnp,
1369 	if ((error = dev_add_name(name ,parent ,NULL, dnp, nm_pp)) != 0)
1371 		devfs_dn_free(dnp); /* 1->0 for dir, 0->(-1) for other */
1393 devfs_record_event(devfs_event_log_t delp, devnode_t *dnp, uint32_t events)
1400 	if (dnp->dn_vn != NULLVP && vnode_ismonitored(dnp->dn_vn)) {
1402 		dvep->dve_vp = dnp->dn_vn;
1403 		dvep->dve_vid = vnode_vid(dnp->dn_vn);
1528 	devnode_t * dnp;
1594 	if (dev_finddir(path, NULL, DEVFS_CREATE, &dnp, &event_log) == 0) {
1596 	    if (dev_add_entry(name, dnp, type, &typeinfo, NULL, NULL, &new_dev) == 0) {
1604 		devfs_propogate(dnp->dn_typeinfo.Dir.myname, new_dev, &event_log);