devfs_int.h

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    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  * $FreeBSD$
   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 
   40 struct devfs_dirent;
   41 
   42 struct cdev_privdata {
   43         struct file             *cdpd_fp;
   44         void                    *cdpd_data;
   45         void                    (*cdpd_dtr)(void *);
   46         LIST_ENTRY(cdev_privdata) cdpd_list;
   47 };
   48 
   49 struct cdev_priv {
   50         struct cdev             cdp_c;
   51         TAILQ_ENTRY(cdev_priv)  cdp_list;
   52 
   53         u_int                   cdp_inode;
   54 
   55         u_int                   cdp_flags;
   56 #define CDP_ACTIVE              (1 << 0)
   57 #define CDP_SCHED_DTR           (1 << 1)
   58 #define CDP_UNREF_DTR           (1 << 2)
   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 
   72 #define cdev2priv(c)    member2struct(cdev_priv, cdp_c, c)
   73 
   74 struct cdev *devfs_alloc(int);
   75 void devfs_free(struct cdev *);
   76 void devfs_create(struct cdev *dev);
   77 void devfs_destroy(struct cdev *dev);
   78 void devfs_destroy_cdevpriv(struct cdev_privdata *p);
   79 
   80 extern struct unrhdr *devfs_inos;
   81 extern struct mtx devmtx;
   82 extern struct mtx devfs_de_interlock;
   83 extern struct sx clone_drain_lock;
   84 extern struct mtx cdevpriv_mtx;
   85 extern TAILQ_HEAD(cdev_priv_list, cdev_priv) cdevp_list;
   86 
   87 #endif /* _KERNEL */
   88 
   89 #endif /* !_FS_DEVFS_DEVFS_INT_H_ */

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FreeBSD/Linux Kernel Cross Reference sys/fs/devfs/devfs_int.h

FreeBSD/Linux Kernel Cross Reference
sys/fs/devfs/devfs_int.h