fs/devfs/devfs_vnops.c

416 	struct cdev *dev;
460 		dev = &de->de_cdp->cdp_c;
462 		dev = NULL;
475 		dev_refl(dev);
477 		vp->v_rdev = dev;
480 		dev->si_usecount += vp->v_usecount;
482 		dsw = dev->si_devsw;
487 		if ((dev->si_flags & SI_ETERNAL) != 0)
560 	struct cdev *dev = vp->v_rdev;
590 				if (count_dev(dev) == 2 &&
614 	dsw = dev_refthread(dev, &ref);
624 	} else if (count_dev(dev) > 1) {
626 		dev_relthread(dev, ref);
629 	if (count_dev(dev) == 1)
635 	KASSERT(dev->si_refcount > 0,
636 	    ("devfs_close() on un-referenced struct cdev *(%s)", devtoname(dev)));
637 	error = dsw->d_close(dev, ap->a_fflag | dflags, S_IFCHR, td);
638 	dev_relthread(dev, ref);
675 	struct cdev *dev;
724 		dev = vp->v_rdev;
725 		fix(dev->si_atime);
726 		vap->va_atime = dev->si_atime;
727 		fix(dev->si_mtime);
728 		vap->va_mtime = dev->si_mtime;
729 		fix(dev->si_ctime);
730 		vap->va_ctime = dev->si_ctime;
732 		vap->va_rdev = cdev2priv(dev)->cdp_inode;
747 	struct cdev *dev;
757 	error = devfs_fp_check(fp, &dev, &dsw, &ref);
766 		dev_relthread(dev, ref);
770 		p = devtoname(dev);
777 		dev_relthread(dev, ref);
780 	error = dsw->d_ioctl(dev, com, data, fp->f_flag, td);
782 	dev_relthread(dev, ref);
806 		td->td_proc->p_session->s_ttydp = cdev2priv(dev);
822 	struct cdev *dev;
830 	error = devfs_fp_check(fp, &dev, &dsw, &ref);
833 	error = dsw->d_kqfilter(dev, kn);
835 	dev_relthread(dev, ref);
1087 	struct cdev *dev = vp->v_rdev;
1097 	if (dev == NULL)
1101 	if (dev->si_iosize_max == 0)
1102 		dev->si_iosize_max = DFLTPHYS;
1104 	dsw = dev_refthread(dev, &ref);
1108 		dev_relthread(dev, ref);
1118 		fp->f_data = dev;
1122 		error = dsw->d_fdopen(dev, ap->a_mode, td, fp);
1124 		error = dsw->d_open(dev, ap->a_mode, S_IFCHR, td);
1131 	dev_relthread(dev, ref);
1138 #if 0	/* /dev/console */
1145 		finit(fp, fp->f_flag, DTYPE_VNODE, dev, &devfs_ops_f);
1218 	struct cdev *dev;
1224 	error = devfs_fp_check(fp, &dev, &dsw, &ref);
1229 	error = dsw->d_poll(dev, events, td);
1231 	dev_relthread(dev, ref);
1250 	struct cdev *dev;
1259 	error = devfs_fp_check(fp, &dev, &dsw, &ref);
1270 	error = dsw->d_read(dev, uio, ioflag);
1272 		devfs_timestamp(&dev->si_atime);
1274 	dev_relthread(dev, ref);
1388 	struct cdev *dev;
1397 	dev = vp->v_rdev;
1399 	if (dev != NULL)
1400 		dev->si_usecount -= vp->v_usecount;
1403 	if (dev != NULL)
1404 		dev_rel(dev);
1457 	struct cdev *dev;
1464 	dev = vp->v_rdev;
1465 	cdp = cdev2priv(dev);
1741 	struct cdev *dev;
1750 	error = devfs_fp_check(fp, &dev, &dsw, &ref);
1763 	error = dsw->d_write(dev, uio, ioflag);
1765 		devfs_timestamp(&dev->si_ctime);
1766 		dev->si_mtime = dev->si_ctime;
1769 	dev_relthread(dev, ref);
1780 	struct cdev *dev;
1814 	 * (i.e. /dev/zero) permit private writable mappings.
1829 	error = devfs_fp_check(fp, &dev, &dsw, &ref);
1833 	error = vm_mmap_cdev(td, size, prot, &maxprot, &flags, dev, dsw, &foff,
1836 	dev_relthread(dev, ref);