devfs_int.h revision 303975
1/*- 2 * Copyright (c) 2005 Poul-Henning Kamp. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Neither the name of the University nor the names of its contributors 10 * may be used to endorse or promote products derived from this software 11 * without specific prior written permission. 12 * 13 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 14 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 16 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 17 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 18 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 19 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 20 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 21 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 22 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 23 * SUCH DAMAGE. 24 * 25 * $FreeBSD: releng/11.0/sys/fs/devfs/devfs_int.h 277391 2015-01-19 17:36:52Z kib $ 26 */ 27 28/* 29 * This file documents a private interface and it SHALL only be used 30 * by kern/kern_conf.c and fs/devfs/... 31 */ 32 33#ifndef _FS_DEVFS_DEVFS_INT_H_ 34#define _FS_DEVFS_DEVFS_INT_H_ 35 36#include <sys/queue.h> 37 38#ifdef _KERNEL 39 40struct devfs_dirent; 41struct devfs_mount; 42 43struct cdev_privdata { 44 struct file *cdpd_fp; 45 void *cdpd_data; 46 void (*cdpd_dtr)(void *); 47 LIST_ENTRY(cdev_privdata) cdpd_list; 48}; 49 50struct cdev_priv { 51 struct cdev cdp_c; 52 TAILQ_ENTRY(cdev_priv) cdp_list; 53 54 u_int cdp_inode; 55 56 u_int cdp_flags; 57#define CDP_ACTIVE (1 << 0) 58#define CDP_SCHED_DTR (1 << 1) 59#define CDP_UNREF_DTR (1 << 2) 60 61 u_int cdp_inuse; 62 u_int cdp_maxdirent; 63 struct devfs_dirent **cdp_dirents; 64 struct devfs_dirent *cdp_dirent0; 65 66 TAILQ_ENTRY(cdev_priv) cdp_dtr_list; 67 void (*cdp_dtr_cb)(void *); 68 void *cdp_dtr_cb_arg; 69 70 LIST_HEAD(, cdev_privdata) cdp_fdpriv; 71}; 72 73#define cdev2priv(c) __containerof(c, struct cdev_priv, cdp_c) 74 75struct cdev *devfs_alloc(int); 76int devfs_dev_exists(const char *); 77void devfs_free(struct cdev *); 78void devfs_create(struct cdev *); 79void devfs_destroy(struct cdev *); 80void devfs_destroy_cdevpriv(struct cdev_privdata *); 81 82int devfs_dir_find(const char *); 83void devfs_dir_ref_de(struct devfs_mount *, struct devfs_dirent *); 84void devfs_dir_unref_de(struct devfs_mount *, struct devfs_dirent *); 85int devfs_pathpath(const char *, const char *); 86 87extern struct unrhdr *devfs_inos; 88extern struct mtx devmtx; 89extern struct mtx devfs_de_interlock; 90extern struct sx clone_drain_lock; 91extern struct mtx cdevpriv_mtx; 92extern TAILQ_HEAD(cdev_priv_list, cdev_priv) cdevp_list; 93 94#endif /* _KERNEL */ 95 96#endif /* !_FS_DEVFS_DEVFS_INT_H_ */ 97