devfs_int.h (3200B) - Raw
1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 2005 Poul-Henning Kamp. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Neither the name of the University nor the names of its contributors 12 * may be used to endorse or promote products derived from this software 13 * without specific prior written permission. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 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 struct devfs_dirent; 39 struct devfs_mount; 40 41 struct cdev_privdata { 42 struct file *cdpd_fp; 43 void *cdpd_data; 44 void (*cdpd_dtr)(void *); 45 LIST_ENTRY(cdev_privdata) cdpd_list; 46 }; 47 48 struct cdev_priv { 49 struct cdev cdp_c; 50 TAILQ_ENTRY(cdev_priv) cdp_list; 51 52 u_int cdp_inode; 53 54 u_int cdp_flags; 55 #define CDP_ACTIVE (1 << 0) 56 #define CDP_SCHED_DTR (1 << 1) 57 #define CDP_UNREF_DTR (1 << 2) 58 #define CDP_ON_ACTIVE_LIST (1 << 3) 59 60 u_int cdp_inuse; 61 u_int cdp_maxdirent; 62 struct devfs_dirent **cdp_dirents; 63 struct devfs_dirent *cdp_dirent0; 64 65 TAILQ_ENTRY(cdev_priv) cdp_dtr_list; 66 void (*cdp_dtr_cb)(void *); 67 void *cdp_dtr_cb_arg; 68 69 LIST_HEAD(, cdev_privdata) cdp_fdpriv; 70 71 struct mtx cdp_threadlock; 72 }; 73 74 #define cdev2priv(c) __containerof(c, struct cdev_priv, cdp_c) 75 76 #ifdef _KERNEL 77 78 struct cdev *devfs_alloc(int); 79 int devfs_dev_exists(const char *); 80 void devfs_free(struct cdev *); 81 void devfs_create(struct cdev *); 82 void devfs_destroy(struct cdev *); 83 void devfs_destroy_cdevpriv(struct cdev_privdata *); 84 85 int devfs_dir_find(const char *); 86 void devfs_dir_ref_de(struct devfs_mount *, struct devfs_dirent *); 87 void devfs_dir_unref_de(struct devfs_mount *, struct devfs_dirent *); 88 int devfs_pathpath(const char *, const char *); 89 90 extern struct unrhdr *devfs_inos; 91 extern struct mtx devmtx; 92 extern struct mtx devfs_de_interlock; 93 extern struct mtx cdevpriv_mtx; 94 extern TAILQ_HEAD(cdev_priv_list, cdev_priv) cdevp_list; 95 96 #define dev_lock_assert_locked() mtx_assert(&devmtx, MA_OWNED) 97 #define dev_lock_assert_unlocked() mtx_assert(&devmtx, MA_NOTOWNED) 98 99 #endif /* _KERNEL */ 100 101 #endif /* !_FS_DEVFS_DEVFS_INT_H_ */