ns/nsctl/nsc_dev.c

490 	nsc_dev_t *dp, *dev;
495 		for (dev = _nsc_dev_top; dev; dev = dev->nsc_next) {
496 			if (path && !nsc_strmatch(dev->nsc_path, path))
499 			if (!(rc = _nsc_reopen_dev(dev, flag | try)))
503 				if (dp == dev)
522  * _nsc_reopen_dev (nsc_dev_t *dev, int flag)
537 _nsc_reopen_dev(dev, flag)
538 nsc_dev_t *dev;
546 	mutex_enter(&dev->nsc_lock);
549 		for (iodev = dev->nsc_list; iodev; iodev = iodev->si_next) {
557 				if (!_nsc_relock_dev(dev, fd, iodev))
568 		for (fd = dev->nsc_close; fd; fd = fd->sf_next) {
575 			if (!_nsc_relock_dev(dev, fd, NULL))
584 	mutex_exit(&dev->nsc_lock);
591  * _nsc_relock_dev (nsc_dev_t *dev, nsc_fd_t *fd, nsc_iodev_t *iodev)
603 _nsc_relock_dev(nsc_dev_t *dev, nsc_fd_t *fd, nsc_iodev_t *iodev)
610 		if (dp == dev)
616 	mutex_enter(&dev->nsc_lock);
619 		for (iop = dev->nsc_list; iop; iop = iop->si_next)
624 		fp = (iodev) ? iodev->si_open : dev->nsc_close;
632 		mutex_exit(&dev->nsc_lock);
642  * _nsc_reopen_fd (nsc_fd_t *dev, int flag)
663 	nsc_dev_t *dev = fd->sf_dev;
677 		_nsc_find_io(dev->nsc_path, fd->sf_type, &changed)) &&
686 	dev->nsc_reopen = 1;
690 	dev->nsc_reopen = 0;
693 		dev->nsc_drop = 1;
695 	mutex_exit(&dev->nsc_lock);
786 	nsc_dev_t *dev = fd->sf_dev;
790 		return (_nsc_wait_dev(dev, flag));
800 	mutex_exit(&dev->nsc_lock);
804 	mutex_enter(&dev->nsc_lock);
810 	if (dev->nsc_wait || dev->nsc_refcnt <= 0)
811 		cv_broadcast(&dev->nsc_cv);
839 	nsc_dev_t *dev = fd->sf_dev;
843 	if ((rc = _nsc_alloc_iodev(dev, fd->sf_type, &iodev)) != 0)
846 	mutex_enter(&dev->nsc_lock);
849 		rc = _nsc_wait_dev(dev, flag);
850 		mutex_exit(&dev->nsc_lock);
856 	mutex_exit(&dev->nsc_lock);
858 	rc = (*iodev->si_io->open)(dev->nsc_path,
869 		rc = _nsc_setval(dev, NULL, NSC_DEVMAJ,
874 			    dev->nsc_path, (int)getmajor((dev_t)fd->sf_cd));
878 		rc = _nsc_setval(dev, NULL, NSC_DEVMIN,
883 			    dev->nsc_path, (int)getminor((dev_t)fd->sf_cd));
889 	_nsc_relink_fd(fd, &dev->nsc_close, &iodev->si_open, iodev);
960 	nsc_dev_t *dev = fd->sf_dev;
965 		if (fd->sf_pend == _NSC_CLOSE && dev->nsc_reopen != 0)
968 		return (_nsc_wait_dev(dev, flag));
981 		return (_nsc_wait_dev(dev, flag));
987 		if (dev->nsc_list == iodev && !iodev->si_next)
988 			if ((rc = _nsc_detach_dev(dev, NULL, flag)) != 0)
997 	mutex_exit(&dev->nsc_lock);
1001 	mutex_enter(&dev->nsc_lock);
1008 	if (dev->nsc_wait || dev->nsc_refcnt <= 0)
1009 		cv_broadcast(&dev->nsc_cv);
1040 	nsc_dev_t *dev = fd->sf_dev;
1050 	_nsc_relink_fd(fd, &iodev->si_open, &dev->nsc_close, iodev);
1121 _nsc_setval(nsc_dev_t *dev, char *path, char *name, int val, int do_ncall)
1131 	ASSERT(dev != NULL || path != NULL);
1133 	if (dev != NULL && path != NULL) {
1134 		ASSERT(strcmp(dev->nsc_path, path) == 0);
1138 	pp = (dev != NULL) ? dev->nsc_path : path;
1152 	if (dev != NULL)
1153 		dv = dev->nsc_values;
1175 		if (dev != NULL)
1176 			dev->nsc_values = dv;
1726 	nsc_dev_t *dev;
1734 	if ((rc = _nsc_alloc_dev(path, &dev)) != 0) {
1739 	mutex_enter(&dev->nsc_lock);
1743 	fd->sf_dev = dev;
1744 	fd->sf_next = dev->nsc_close;
1745 	dev->nsc_close = fd;
1747 	mutex_exit(&dev->nsc_lock);
1767 	nsc_dev_t *dev = fd->sf_dev;
1773 	mutex_enter(&dev->nsc_lock);
1775 	for (fdp = &dev->nsc_close; *fdp; fdp = &(*fdp)->sf_next)
1781 	if (dev->nsc_wait || dev->nsc_refcnt <= 0)
1782 		cv_broadcast(&dev->nsc_cv);
1785 		(void) _nsc_wait_dev(dev, 0);
1787 	mutex_exit(&dev->nsc_lock);
1789 	_nsc_free_dev(dev);
1810 	nsc_dev_t *dev = fd->sf_dev;
1813 	mutex_enter(&dev->nsc_lock);
1816 		(void) _nsc_wait_dev(dev, 0);
1827 	mutex_exit(&dev->nsc_lock);
1833  * _nsc_alloc_iodev (nsc_dev_t *dev, int type, nsc_iodev_t **iodevp)
1852 _nsc_alloc_iodev(dev, type, iodevp)
1853 nsc_dev_t *dev;
1867 	if (!(io = _nsc_reserve_io(dev->nsc_path, type))) {
1876 	iodev->si_dev = dev;
1879 	dev->nsc_refcnt++;
1882 	mutex_enter(&dev->nsc_lock);
1884 	for (ip = dev->nsc_list; ip; ip = ip->si_next)
1891 		iodev->si_next = dev->nsc_list;
1892 		dev->nsc_list = iodev;
1895 	mutex_exit(&dev->nsc_lock);
1922 	nsc_dev_t *dev;
1927 	dev = iodev->si_dev;
1929 	mutex_enter(&dev->nsc_lock);
1932 		mutex_exit(&dev->nsc_lock);
1936 	for (ipp = &dev->nsc_list; *ipp; ipp = &(*ipp)->si_next)
1942 	if (dev->nsc_wait || dev->nsc_refcnt <= 0)
1943 		cv_broadcast(&dev->nsc_cv);
1946 		(void) _nsc_wait_dev(dev, 0);
1948 	mutex_exit(&dev->nsc_lock);
1951 	_nsc_free_dev(dev);
1985 	nsc_dev_t *dev, *dp, **ddp;
1991 	if (!(dev = (nsc_dev_t *)nsc_kmem_zalloc(
1992 	    sizeof (*dev), KM_SLEEP, _nsc_local_mem)))
1995 	dev->nsc_refcnt++;
1997 	mutex_init(&dev->nsc_lock, NULL, MUTEX_DRIVER, NULL);
1998 	cv_init(&dev->nsc_cv, NULL, CV_DRIVER, NULL);
2000 	dev->nsc_phash = nsc_strhash(path);
2001 	dev->nsc_path = nsc_strdup(path);
2005 	dev->nsc_next = _nsc_dev_pend;
2006 	_nsc_dev_pend = dev;
2013 		if (dp->nsc_phash == dev->nsc_phash &&
2014 		    strcmp(dp->nsc_path, dev->nsc_path) == 0) {
2021 			if (*ddp == dev) {
2022 				*ddp = dev->nsc_next;
2026 		dev->nsc_next = _nsc_dev_top;
2027 		_nsc_dev_top = dev;
2033 		_nsc_free_dev(dev);
2034 		dev = dp;
2044 	if (dev->nsc_values == NULL) {
2046 			if (dv->dv_phash == dev->nsc_phash &&
2047 			    strcmp(dv->dv_path, dev->nsc_path) == 0) {
2048 				dev->nsc_values = dv;
2087 	*devp = dev;
2094  * _nsc_free_dev (nsc_dev_t *dev)
2107 _nsc_free_dev(dev)
2108 nsc_dev_t *dev;
2112 	if (!dev)
2117 	if (--dev->nsc_refcnt > 0) {
2123 		if (*ddp == dev) {
2124 			*ddp = dev->nsc_next;
2125 			dev->nsc_next = _nsc_dev_pend;
2126 			_nsc_dev_pend = dev;
2132 	mutex_enter(&dev->nsc_lock);
2134 	while (dev->nsc_pend || dev->nsc_rpend || dev->nsc_wait) {
2135 		cv_wait(&dev->nsc_cv, &dev->nsc_lock);
2138 	mutex_exit(&dev->nsc_lock);
2143 		if (*ddp == dev) {
2144 			*ddp = dev->nsc_next;
2150 	mutex_destroy(&dev->nsc_lock);
2151 	cv_destroy(&dev->nsc_cv);
2152 	nsc_strfree(dev->nsc_path);
2154 	nsc_kmem_free(dev, sizeof (*dev));