147 	struct sndstat_file *pf;  in sndstat_open()  local
149 	pf = malloc(sizeof(*pf), M_DEVBUF, M_WAITOK | M_ZERO);  in sndstat_open()
151 	sbuf_new(&pf->sbuf, NULL, 4096, SBUF_AUTOEXTEND);  in sndstat_open()
153 	pf->fflags = flags;  in sndstat_open()
154 	TAILQ_INIT(&pf->userdev_list);  in sndstat_open()
155 	sx_init(&pf->lock, "sndstat_file");  in sndstat_open()
158 	TAILQ_INSERT_TAIL(&sndstat_filelist, pf, entry);  in sndstat_open()
161 	devfs_set_cdevpriv(pf, &sndstat_close);  in sndstat_open()
169  * * pf->lock held
172 sndstat_remove_all_userdevs(struct sndstat_file *pf)  in sndstat_remove_all_userdevs()  argument
177 	    sx_xlocked(&pf->lock), ("%s: Called without pf->lock", __func__));  in sndstat_remove_all_userdevs()
178 	while ((ud = TAILQ_FIRST(&pf->userdev_list)) != NULL) {  in sndstat_remove_all_userdevs()
179 		TAILQ_REMOVE(&pf->userdev_list, ud, link);  in sndstat_remove_all_userdevs()
192 	struct sndstat_file *pf = (struct sndstat_file *)sndstat_file;  in sndstat_close()  local
195 	sbuf_delete(&pf->sbuf);  in sndstat_close()
196 	TAILQ_REMOVE(&sndstat_filelist, pf, entry);  in sndstat_close()
199 	free(pf->devs_nvlbuf, M_NVLIST);  in sndstat_close()
200 	sx_xlock(&pf->lock);  in sndstat_close()
201 	sndstat_remove_all_userdevs(pf);  in sndstat_close()
202 	sx_xunlock(&pf->lock);  in sndstat_close()
203 	sx_destroy(&pf->lock);  in sndstat_close()
205 	free(pf, M_DEVBUF);  in sndstat_close()
211 	struct sndstat_file *pf;  in sndstat_read()  local
215 	err = devfs_get_cdevpriv((void **)&pf);  in sndstat_read()
224 	if (pf->out_offset != 0) {  in sndstat_read()
228 	} else if (pf->in_offset == 0) {  in sndstat_read()
229 		err = sndstat_prepare(pf);  in sndstat_read()
235 	len = sbuf_len(&pf->sbuf) - pf->in_offset;  in sndstat_read()
239 		err = uiomove(sbuf_data(&pf->sbuf) + pf->in_offset, len, buf);  in sndstat_read()
240 	pf->in_offset += len;  in sndstat_read()
249 	struct sndstat_file *pf;  in sndstat_write()  local
254 	err = devfs_get_cdevpriv((void **)&pf);  in sndstat_write()
267 	if (pf->in_offset != 0) {  in sndstat_write()
272 		sx_xlock(&pf->lock);  in sndstat_write()
273 		sndstat_remove_all_userdevs(pf);  in sndstat_write()
274 		sx_xunlock(&pf->lock);  in sndstat_write()
287 			if (sbuf_bcat(&pf->sbuf, temp, len) < 0) {  in sndstat_write()
292 		sbuf_finish(&pf->sbuf);  in sndstat_write()
297 			str = sbuf_data(&pf->sbuf);  in sndstat_write()
301 				ud = sndstat_line2userdev(pf, line, strlen(line));  in sndstat_write()
305 				sx_xlock(&pf->lock);  in sndstat_write()
306 				TAILQ_INSERT_TAIL(&pf->userdev_list, ud, link);  in sndstat_write()
307 				sx_xunlock(&pf->lock);  in sndstat_write()
310 			pf->out_offset = sbuf_len(&pf->sbuf);  in sndstat_write()
312 			pf->out_offset = 0;  in sndstat_write()
314 		sbuf_clear(&pf->sbuf);  in sndstat_write()
680 	struct sndstat_file *pf;  in sndstat_create_devs_nvlist()  local
705 	TAILQ_FOREACH(pf, &sndstat_filelist, entry) {  in sndstat_create_devs_nvlist()
708 		sx_xlock(&pf->lock);  in sndstat_create_devs_nvlist()
710 		TAILQ_FOREACH(ud, &pf->userdev_list, link) {  in sndstat_create_devs_nvlist()
715 				sx_xunlock(&pf->lock);  in sndstat_create_devs_nvlist()
723 				sx_xunlock(&pf->lock);  in sndstat_create_devs_nvlist()
728 		sx_xunlock(&pf->lock);  in sndstat_create_devs_nvlist()
740 sndstat_refresh_devs(struct sndstat_file *pf)  in sndstat_refresh_devs()  argument
742 	sx_xlock(&pf->lock);  in sndstat_refresh_devs()
743 	free(pf->devs_nvlbuf, M_NVLIST);  in sndstat_refresh_devs()
744 	pf->devs_nvlbuf = NULL;  in sndstat_refresh_devs()
745 	pf->devs_nbytes = 0;  in sndstat_refresh_devs()
746 	sx_unlock(&pf->lock);  in sndstat_refresh_devs()
752 sndstat_get_devs(struct sndstat_file *pf, void *arg_buf, size_t *arg_nbytes)  in sndstat_get_devs()  argument
757 	sx_xlock(&pf->lock);  in sndstat_get_devs()
759 	if (pf->devs_nvlbuf == NULL) {  in sndstat_get_devs()
765 		sx_xunlock(&pf->lock);  in sndstat_get_devs()
773 		sx_xlock(&pf->lock);  in sndstat_get_devs()
780 			sx_xunlock(&pf->lock);  in sndstat_get_devs()
786 		free(pf->devs_nvlbuf, M_NVLIST);  in sndstat_get_devs()
787 		pf->devs_nvlbuf = nvlbuf;  in sndstat_get_devs()
788 		pf->devs_nbytes = nbytes;  in sndstat_get_devs()
794 		*arg_nbytes = pf->devs_nbytes;  in sndstat_get_devs()
798 	if (*arg_nbytes < pf->devs_nbytes) {  in sndstat_get_devs()
804 	err = copyout(pf->devs_nvlbuf, arg_buf, pf->devs_nbytes);  in sndstat_get_devs()
808 	*arg_nbytes = pf->devs_nbytes;  in sndstat_get_devs()
810 	free(pf->devs_nvlbuf, M_NVLIST);  in sndstat_get_devs()
811 	pf->devs_nvlbuf = NULL;  in sndstat_get_devs()
812 	pf->devs_nbytes = 0;  in sndstat_get_devs()
815 	sx_unlock(&pf->lock);  in sndstat_get_devs()
979 sndstat_add_user_devs(struct sndstat_file *pf, void *nvlbuf, size_t nbytes)  in sndstat_add_user_devs()  argument
986 	if ((pf->fflags & FWRITE) == 0) {  in sndstat_add_user_devs()
1011 	sx_xlock(&pf->lock);  in sndstat_add_user_devs()
1017 			sx_unlock(&pf->lock);  in sndstat_add_user_devs()
1020 		TAILQ_INSERT_TAIL(&pf->userdev_list, ud, link);  in sndstat_add_user_devs()
1022 	sx_unlock(&pf->lock);  in sndstat_add_user_devs()
1030 sndstat_flush_user_devs(struct sndstat_file *pf)  in sndstat_flush_user_devs()  argument
1032 	if ((pf->fflags & FWRITE) == 0)  in sndstat_flush_user_devs()
1035 	sx_xlock(&pf->lock);  in sndstat_flush_user_devs()
1036 	sndstat_remove_all_userdevs(pf);  in sndstat_flush_user_devs()
1037 	sx_xunlock(&pf->lock);  in sndstat_flush_user_devs()
1047 	struct sndstat_file *pf;  in sndstat_ioctl()  local
1054 	err = devfs_get_cdevpriv((void **)&pf);  in sndstat_ioctl()
1061 		err = sndstat_get_devs(pf, arg->buf, &arg->nbytes);  in sndstat_ioctl()
1067 		err = sndstat_get_devs(pf, (void *)(uintptr_t)arg32->buf,  in sndstat_ioctl()
1077 		err = sndstat_add_user_devs(pf, arg->buf, arg->nbytes);  in sndstat_ioctl()
1082 		err = sndstat_add_user_devs(pf, (void *)(uintptr_t)arg32->buf,  in sndstat_ioctl()
1087 		err = sndstat_refresh_devs(pf);  in sndstat_ioctl()
1090 		err = sndstat_flush_user_devs(pf);  in sndstat_ioctl()
1100 sndstat_line2userdev(struct sndstat_file *pf, const char *line, int n)  in sndstat_line2userdev()  argument
1376 	struct sndstat_file *pf;  in sndstat_prepare()  local
1408 	TAILQ_FOREACH(pf, &sndstat_filelist, entry) {  in sndstat_prepare()
1411 		if (pf == pf_self)  in sndstat_prepare()
1413 		sx_xlock(&pf->lock);  in sndstat_prepare()
1414 		if (TAILQ_EMPTY(&pf->userdev_list)) {  in sndstat_prepare()
1415 			sx_unlock(&pf->lock);  in sndstat_prepare()
1420 		TAILQ_FOREACH(ud, &pf->userdev_list, link) {  in sndstat_prepare()
1428 		sx_unlock(&pf->lock);  in sndstat_prepare()