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File: [cvs.NetBSD.org] / src / sys / miscfs / fdesc / fdesc.h (download)

Revision 1.11, Thu Mar 16 18:08:23 2000 UTC (21 years, 10 months ago) by jdolecek
Branch: MAIN
CVS Tags: thorpej_scsipi_nbase, thorpej_scsipi_beforemerge, thorpej_scsipi_base, thorpej-mips-cache-base, thorpej-mips-cache, thorpej-devvp-base3, thorpej-devvp-base2, thorpej-devvp-base, thorpej-devvp, pre-chs-ubcperf, post-chs-ubcperf, newlock-base, newlock, netbsd-1-6-base, netbsd-1-6-RELEASE, netbsd-1-6-RC3, netbsd-1-6-RC2, netbsd-1-6-RC1, netbsd-1-6-PATCH002-RELEASE, netbsd-1-6-PATCH002-RC4, netbsd-1-6-PATCH002-RC3, netbsd-1-6-PATCH002-RC2, netbsd-1-6-PATCH002-RC1, netbsd-1-6-PATCH002, netbsd-1-6-PATCH001-RELEASE, netbsd-1-6-PATCH001-RC3, netbsd-1-6-PATCH001-RC2, netbsd-1-6-PATCH001-RC1, netbsd-1-6-PATCH001, netbsd-1-6, netbsd-1-5-base, netbsd-1-5-RELEASE, netbsd-1-5-PATCH003, netbsd-1-5-PATCH002, netbsd-1-5-PATCH001, netbsd-1-5-BETA2, netbsd-1-5-BETA, netbsd-1-5-ALPHA2, netbsd-1-5, nathanw_sa_end, nathanw_sa_before_merge, nathanw_sa_base, nathanw_sa, minoura-xpg4dl-base, minoura-xpg4dl, kqueue-beforemerge, kqueue-base, kqueue-aftermerge, kqueue, ifpoll-base, gmcgarry_ucred_base, gmcgarry_ucred, gmcgarry_ctxsw_base, gmcgarry_ctxsw, gehenna-devsw-base, gehenna-devsw, fvdl_fs64_base, eeh-devprop-base, eeh-devprop
Changes since 1.10: +2 -1 lines

Add new VFS op routine - vfs_done and call it on filesystem detach
in vfs_detach(). vfs_done may free global filesystem's resources,
typically those allocated in respective filesystem's init function.
Needed so those filesystems which went in via LKM have a chance to
clean after themselves before unloading. This fixes random panics
when LKM for filesystem using pools was loaded and unloaded several
times.

For each leaf filesystem, add appropriate vfs_done routine.

/*	$NetBSD: fdesc.h,v 1.11 2000/03/16 18:08:23 jdolecek Exp $	*/

/*
 * Copyright (c) 1992, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * This code is derived from software donated to Berkeley by
 * Jan-Simon Pendry.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *	@(#)fdesc.h	8.8 (Berkeley) 4/3/95
 *
 * #Id: fdesc.h,v 1.8 1993/04/06 15:28:33 jsp Exp #
 */

#ifdef _KERNEL
struct fdescmount {
	struct vnode	*f_root;	/* Root node */
};

#define FD_ROOT		2
#define FD_DEVFD	3
#define FD_STDIN	4
#define FD_STDOUT	5
#define FD_STDERR	6
#define FD_CTTY		7
#define FD_DESC		8
#define FD_MAX		12

typedef enum {
	Froot,
	Fdevfd,
	Fdesc,
	Flink,
	Fctty
} fdntype;

struct fdescnode {
	LIST_ENTRY(fdescnode) fd_hash;	/* Hash list */
	struct vnode	*fd_vnode;	/* Back ptr to vnode */
	fdntype		fd_type;	/* Type of this node */
	unsigned	fd_fd;		/* Fd to be dup'ed */
	char		*fd_link;	/* Link to fd/n */
	int		fd_ix;		/* filesystem index */
};

#define VFSTOFDESC(mp)	((struct fdescmount *)((mp)->mnt_data))
#define	VTOFDESC(vp) ((struct fdescnode *)(vp)->v_data)

extern dev_t devctty;
extern void fdesc_init __P((void));
extern void fdesc_done __P((void));
extern int fdesc_root __P((struct mount *, struct vnode **));
extern int fdesc_allocvp __P((fdntype, int, struct mount *, struct vnode **));
extern int (**fdesc_vnodeop_p) __P((void *));
extern struct vfsops fdesc_vfsops;
#endif /* _KERNEL */