Retire kernfs (kernel part).
This commit is contained in:
parent
88b471a108
commit
dd488b6dd8
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=70426
@ -85,7 +85,6 @@ module_path="/boot/kernel;/boot/modules;/modules" # Set the module search path
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cd9660_load="NO" # ISO 9660 filesystem
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coda_load="NO" # CODA filesystem
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fdesc_load="NO" # Filedescriptors filesystem
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kernfs_load="NO" # Kernel filesystem
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mfs_load="NO" # Memory filesystem
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msdos_load="NO" # FAT-12/16/32
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nfs_load="NO" # NFS
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@ -667,7 +667,6 @@ options NFS #Network File System
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#options NFS_NOSERVER #Disable the NFS-server code.
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options CD9660 #ISO 9660 filesystem
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options FDESC #File descriptor filesystem
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options KERNFS #Kernel filesystem
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options MSDOSFS #MS DOS File System (FAT, FAT32)
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options NTFS #NT File System
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options NULLFS #NULL filesystem
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@ -737,8 +737,6 @@ miscfs/deadfs/dead_vnops.c standard
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miscfs/fdesc/fdesc_vfsops.c optional fdesc
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miscfs/fdesc/fdesc_vnops.c optional fdesc
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miscfs/fifofs/fifo_vnops.c standard
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miscfs/kernfs/kernfs_vfsops.c optional kernfs
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miscfs/kernfs/kernfs_vnops.c optional kernfs
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miscfs/nullfs/null_subr.c optional nullfs
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miscfs/nullfs/null_vfsops.c optional nullfs
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miscfs/nullfs/null_vnops.c optional nullfs
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@ -107,7 +107,6 @@ INCLUDE_CONFIG_FILE opt_config.h
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# options in a never-included header.
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EXT2FS opt_dontuse.h
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FDESC opt_dontuse.h
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KERNFS opt_dontuse.h
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MFS opt_dontuse.h
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MSDOSFS opt_dontuse.h
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NULLFS opt_dontuse.h
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@ -667,7 +667,6 @@ options NFS #Network File System
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#options NFS_NOSERVER #Disable the NFS-server code.
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options CD9660 #ISO 9660 filesystem
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options FDESC #File descriptor filesystem
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options KERNFS #Kernel filesystem
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options MSDOSFS #MS DOS File System (FAT, FAT32)
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options NTFS #NT File System
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options NULLFS #NULL filesystem
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@ -34,7 +34,6 @@ COMM= ${SYS}/conf/*.[ch] \
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${SYS}/miscfs/devfs/*.[ch] \
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${SYS}/miscfs/fdesc/*.[ch] \
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${SYS}/miscfs/fifofs/*.[ch] \
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${SYS}/miscfs/kernfs/*.[ch] \
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${SYS}/miscfs/nullfs/*.[ch] \
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${SYS}/miscfs/portal/*.[ch] \
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${SYS}/miscfs/procfs/*.[ch] \
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@ -98,7 +97,6 @@ COMMDIR2= ${SYS}/dev/advansys \
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${SYS}/miscfs/devfs \
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${SYS}/miscfs/fdesc \
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${SYS}/miscfs/fifofs \
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${SYS}/miscfs/kernfs \
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${SYS}/miscfs/nullfs \
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${SYS}/miscfs/portal \
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${SYS}/miscfs/procfs \
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@ -35,7 +35,7 @@ DGEN= conf \
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dev dev/scsi \
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hp hp/dev hp/hpux \
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kern libkern \
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miscfs miscfs/deadfs miscfs/fdesc miscfs/fifofs miscfs/kernfs \
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miscfs miscfs/deadfs miscfs/fdesc miscfs/fifofs \
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miscfs/lofs miscfs/nullfs miscfs/portal miscfs/procfs \
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miscfs/specfs miscfs/umapfs miscfs/union \
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net netccitt netinet netiso netns nfs scripts sys \
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@ -1,55 +0,0 @@
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/*
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* Copyright (c) 1992, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software donated to Berkeley by
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* Jan-Simon Pendry.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)kernfs.h 8.6 (Berkeley) 3/29/95
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* $FreeBSD$
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*/
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#define _PATH_KERNFS "/kern" /* Default mountpoint */
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#ifdef _KERNEL
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struct kernfs_mount {
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struct vnode *kf_root; /* Root node */
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};
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struct kernfs_node {
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struct kern_target *kf_kt;
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};
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#define VFSTOKERNFS(mp) ((struct kernfs_mount *)((mp)->mnt_data))
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#define VTOKERN(vp) ((struct kernfs_node *)(vp)->v_data)
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extern vop_t **kernfs_vnodeop_p;
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#endif /* _KERNEL */
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@ -1,237 +0,0 @@
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/*
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* Copyright (c) 1992, 1993, 1995
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software donated to Berkeley by
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* Jan-Simon Pendry.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)kernfs_vfsops.c 8.10 (Berkeley) 5/14/95
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* $FreeBSD$
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*/
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/*
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* Kernel params Filesystem
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/conf.h>
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#include <sys/vnode.h>
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#include <sys/mount.h>
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#include <sys/malloc.h>
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#include <miscfs/kernfs/kernfs.h>
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static MALLOC_DEFINE(M_KERNFSMNT, "KERNFS mount", "KERNFS mount structure");
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static int kernfs_mount __P((struct mount *mp, char *path, caddr_t data,
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struct nameidata *ndp, struct proc *p));
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static int kernfs_unmount __P((struct mount *mp, int mntflags,
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struct proc *p));
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static int kernfs_root __P((struct mount *mp, struct vnode **vpp));
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static int kernfs_statfs __P((struct mount *mp, struct statfs *sbp,
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struct proc *p));
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/*
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* Mount the Kernel params filesystem
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*/
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static int
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kernfs_mount(mp, path, data, ndp, p)
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struct mount *mp;
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char *path;
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caddr_t data;
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struct nameidata *ndp;
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struct proc *p;
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{
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int error = 0;
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size_t size;
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struct kernfs_mount *fmp;
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struct vnode *rvp;
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#ifdef DEBUG
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printf("kernfs_mount(mp = %p)\n", (void *)mp);
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#endif
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/*
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* Update is a no-op
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*/
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if (mp->mnt_flag & MNT_UPDATE)
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return (EOPNOTSUPP);
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MALLOC(fmp, struct kernfs_mount *, sizeof(struct kernfs_mount),
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M_KERNFSMNT, M_WAITOK); /* XXX */
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error = getnewvnode(VT_KERNFS, mp, kernfs_vnodeop_p, &rvp); /* XXX */
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if (error) {
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FREE(fmp, M_KERNFSMNT);
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return (error);
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}
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rvp->v_type = VDIR;
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rvp->v_flag |= VROOT;
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#ifdef DEBUG
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printf("kernfs_mount: root vp = %p\n", (void *)rvp);
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#endif
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fmp->kf_root = rvp;
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mp->mnt_flag |= MNT_LOCAL;
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mp->mnt_data = (qaddr_t) fmp;
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vfs_getnewfsid(mp);
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(void) copyinstr(path, mp->mnt_stat.f_mntonname, MNAMELEN - 1, &size);
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bzero(mp->mnt_stat.f_mntonname + size, MNAMELEN - size);
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bzero(mp->mnt_stat.f_mntfromname, MNAMELEN);
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bcopy("kernfs", mp->mnt_stat.f_mntfromname, sizeof("kernfs"));
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(void)kernfs_statfs(mp, &mp->mnt_stat, p);
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#ifdef DEBUG
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printf("kernfs_mount: at %s\n", mp->mnt_stat.f_mntonname);
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#endif
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return (0);
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}
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static int
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kernfs_unmount(mp, mntflags, p)
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struct mount *mp;
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int mntflags;
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struct proc *p;
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{
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int error;
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int flags = 0;
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struct vnode *rootvp = VFSTOKERNFS(mp)->kf_root;
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#ifdef DEBUG
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printf("kernfs_unmount(mp = %p)\n", (void *)mp);
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#endif
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if (mntflags & MNT_FORCE)
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flags |= FORCECLOSE;
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/*
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* Clear out buffer cache. I don't think we
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* ever get anything cached at this level at the
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* moment, but who knows...
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*/
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if (rootvp->v_usecount > 1)
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return (EBUSY);
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#ifdef DEBUG
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printf("kernfs_unmount: calling vflush\n");
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#endif
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error = vflush(mp, rootvp, flags);
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if (error)
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return (error);
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#ifdef DEBUG
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vprint("kernfs root", rootvp);
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#endif
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/*
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* Release reference on underlying root vnode
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*/
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vrele(rootvp);
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/*
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* And blow it away for future re-use
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*/
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vgone(rootvp);
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/*
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* Finally, throw away the kernfs_mount structure
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*/
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free(mp->mnt_data, M_KERNFSMNT); /* XXX */
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mp->mnt_data = 0;
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return 0;
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}
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static int
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kernfs_root(mp, vpp)
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struct mount *mp;
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struct vnode **vpp;
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{
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struct proc *p = curproc; /* XXX */
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struct vnode *vp;
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#ifdef DEBUG
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printf("kernfs_root(mp = %p)\n", (void *)mp);
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#endif
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/*
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* Return locked reference to root.
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*/
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vp = VFSTOKERNFS(mp)->kf_root;
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VREF(vp);
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vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p);
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*vpp = vp;
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return (0);
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}
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static int
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kernfs_statfs(mp, sbp, p)
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struct mount *mp;
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struct statfs *sbp;
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struct proc *p;
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{
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#ifdef DEBUG
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printf("kernfs_statfs(mp = %p)\n", (void *)mp);
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#endif
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sbp->f_flags = 0;
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sbp->f_bsize = DEV_BSIZE;
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sbp->f_iosize = DEV_BSIZE;
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sbp->f_blocks = 2; /* 1K to keep df happy */
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sbp->f_bfree = 0;
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sbp->f_bavail = 0;
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sbp->f_files = 0;
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sbp->f_ffree = 0;
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if (sbp != &mp->mnt_stat) {
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sbp->f_type = mp->mnt_vfc->vfc_typenum;
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bcopy(&mp->mnt_stat.f_fsid, &sbp->f_fsid, sizeof(sbp->f_fsid));
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bcopy(mp->mnt_stat.f_mntonname, sbp->f_mntonname, MNAMELEN);
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bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN);
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}
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return (0);
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}
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static struct vfsops kernfs_vfsops = {
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kernfs_mount,
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vfs_stdstart,
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kernfs_unmount,
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kernfs_root,
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vfs_stdquotactl,
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kernfs_statfs,
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vfs_stdsync,
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vfs_stdvget,
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vfs_stdfhtovp,
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vfs_stdcheckexp,
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vfs_stdvptofh,
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vfs_stdinit,
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vfs_stduninit,
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vfs_stdextattrctl,
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};
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VFS_SET(kernfs_vfsops, kernfs, VFCF_SYNTHETIC);
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@ -1,610 +0,0 @@
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/*
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* Copyright (c) 1992, 1993
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* The Regents of the University of California. All rights reserved.
|
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*
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* This code is derived from software donated to Berkeley by
|
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* 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.
|
||||
*
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* @(#)kernfs_vnops.c 8.15 (Berkeley) 5/21/95
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* $FreeBSD$
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*/
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/*
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* Kernel parameter filesystem (/kern)
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/vmmeter.h>
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#include <sys/time.h>
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#include <sys/vnode.h>
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#include <sys/malloc.h>
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#include <sys/stat.h>
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#include <sys/mount.h>
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#include <sys/namei.h>
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#include <sys/dirent.h>
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#include <sys/resource.h>
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#include <miscfs/kernfs/kernfs.h>
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#define KSTRING 256 /* Largest I/O available via this filesystem */
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#define UIO_MX 32
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#define READ_MODE (S_IRUSR|S_IRGRP|S_IROTH)
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#define WRITE_MODE (S_IWUSR|S_IRUSR|S_IRGRP|S_IROTH)
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#define DIR_MODE (S_IRUSR|S_IXUSR|S_IRGRP|S_IXGRP|S_IROTH|S_IXOTH)
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static struct kern_target {
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u_char kt_type;
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u_char kt_namlen;
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char *kt_name;
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void *kt_data;
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#define KTT_NULL 1
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#define KTT_TIME 5
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#define KTT_INT 17
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#define KTT_STRING 31
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#define KTT_HOSTNAME 47
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#define KTT_BOOTFILE 49
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#define KTT_AVENRUN 53
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u_char kt_tag;
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u_char kt_vtype;
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mode_t kt_mode;
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} kern_targets[] = {
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/* NOTE: The name must be less than UIO_MX-16 chars in length */
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#define N(s) sizeof(s)-1, s
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||||
/* name data tag type ro/rw */
|
||||
{ DT_DIR, N("."), 0, KTT_NULL, VDIR, DIR_MODE },
|
||||
{ DT_DIR, N(".."), 0, KTT_NULL, VDIR, DIR_MODE },
|
||||
{ DT_REG, N("boottime"), &boottime.tv_sec, KTT_INT, VREG, READ_MODE },
|
||||
{ DT_REG, N("copyright"), copyright, KTT_STRING, VREG, READ_MODE },
|
||||
{ DT_REG, N("hostname"), 0, KTT_HOSTNAME, VREG, WRITE_MODE },
|
||||
{ DT_REG, N("bootfile"), 0, KTT_BOOTFILE, VREG, READ_MODE },
|
||||
{ DT_REG, N("hz"), &hz, KTT_INT, VREG, READ_MODE },
|
||||
{ DT_REG, N("loadavg"), 0, KTT_AVENRUN, VREG, READ_MODE },
|
||||
{ DT_REG, N("pagesize"), &cnt.v_page_size, KTT_INT, VREG, READ_MODE },
|
||||
{ DT_REG, N("physmem"), &physmem, KTT_INT, VREG, READ_MODE },
|
||||
{ DT_REG, N("time"), 0, KTT_TIME, VREG, READ_MODE },
|
||||
{ DT_REG, N("version"), version, KTT_STRING, VREG, READ_MODE },
|
||||
#undef N
|
||||
};
|
||||
static int nkern_targets = sizeof(kern_targets) / sizeof(kern_targets[0]);
|
||||
|
||||
static int kernfs_access __P((struct vop_access_args *ap));
|
||||
static int kernfs_badop __P((void));
|
||||
static int kernfs_getattr __P((struct vop_getattr_args *ap));
|
||||
static int kernfs_inactive __P((struct vop_inactive_args *ap));
|
||||
static int kernfs_lookup __P((struct vop_lookup_args *ap));
|
||||
static int kernfs_print __P((struct vop_print_args *ap));
|
||||
static int kernfs_read __P((struct vop_read_args *ap));
|
||||
static int kernfs_readdir __P((struct vop_readdir_args *ap));
|
||||
static int kernfs_reclaim __P((struct vop_reclaim_args *ap));
|
||||
static int kernfs_setattr __P((struct vop_setattr_args *ap));
|
||||
static int kernfs_write __P((struct vop_write_args *ap));
|
||||
static int kernfs_xread __P((struct kern_target *kt, char *buf, int len,
|
||||
int *lenp));
|
||||
static int kernfs_xwrite __P((struct kern_target *kt, char *buf, int len));
|
||||
|
||||
static int
|
||||
kernfs_xread(kt, buf, len, lenp)
|
||||
struct kern_target *kt;
|
||||
char *buf;
|
||||
int len;
|
||||
int *lenp;
|
||||
{
|
||||
|
||||
switch (kt->kt_tag) {
|
||||
case KTT_TIME: {
|
||||
struct timeval tv;
|
||||
microtime(&tv);
|
||||
snprintf(buf, len, "%ld %ld\n", tv.tv_sec, tv.tv_usec);
|
||||
break;
|
||||
}
|
||||
|
||||
case KTT_INT: {
|
||||
int *ip = kt->kt_data;
|
||||
snprintf(buf, len, "%d\n", *ip);
|
||||
break;
|
||||
}
|
||||
|
||||
case KTT_STRING: {
|
||||
char *cp = kt->kt_data;
|
||||
int xlen = strlen(cp) + 1;
|
||||
|
||||
if (xlen >= len)
|
||||
return (EINVAL);
|
||||
|
||||
bcopy(cp, buf, xlen);
|
||||
break;
|
||||
}
|
||||
|
||||
case KTT_HOSTNAME: {
|
||||
char *cp = hostname;
|
||||
int xlen = strlen(hostname);
|
||||
|
||||
if (xlen >= (len-2))
|
||||
return (EINVAL);
|
||||
|
||||
bcopy(cp, buf, xlen);
|
||||
buf[xlen] = '\n';
|
||||
buf[xlen+1] = '\0';
|
||||
break;
|
||||
}
|
||||
|
||||
case KTT_BOOTFILE: {
|
||||
char *cp = kernelname;
|
||||
int xlen = strlen(cp) + 1;
|
||||
|
||||
if (xlen >= (len-2))
|
||||
return (EINVAL);
|
||||
|
||||
bcopy(cp, buf, xlen);
|
||||
buf[xlen] = '\n';
|
||||
buf[xlen+1] = '\0';
|
||||
break;
|
||||
}
|
||||
|
||||
case KTT_AVENRUN:
|
||||
snprintf(buf, len, "%lu %lu %lu %ld\n",
|
||||
(u_long)averunnable.ldavg[0], (u_long)averunnable.ldavg[1],
|
||||
(u_long)averunnable.ldavg[2], averunnable.fscale);
|
||||
break;
|
||||
|
||||
default:
|
||||
return (EIO);
|
||||
}
|
||||
|
||||
*lenp = strlen(buf);
|
||||
return (0);
|
||||
}
|
||||
|
||||
static int
|
||||
kernfs_xwrite(kt, buf, len)
|
||||
struct kern_target *kt;
|
||||
char *buf;
|
||||
int len;
|
||||
{
|
||||
|
||||
switch (kt->kt_tag) {
|
||||
case KTT_HOSTNAME:
|
||||
/* XXX BOGUS !!! no check for the length */
|
||||
if (buf[len-1] == '\n')
|
||||
--len;
|
||||
bcopy(buf, hostname, len);
|
||||
hostname[len] = '\0';
|
||||
return (0);
|
||||
|
||||
default:
|
||||
return (EIO);
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* vp is the current namei directory
|
||||
* ndp is the name to locate in that directory...
|
||||
*/
|
||||
static int
|
||||
kernfs_lookup(ap)
|
||||
struct vop_lookup_args /* {
|
||||
struct vnode * a_dvp;
|
||||
struct vnode ** a_vpp;
|
||||
struct componentname * a_cnp;
|
||||
} */ *ap;
|
||||
{
|
||||
struct componentname *cnp = ap->a_cnp;
|
||||
struct vnode **vpp = ap->a_vpp;
|
||||
struct vnode *dvp = ap->a_dvp;
|
||||
char *pname = cnp->cn_nameptr;
|
||||
struct proc *p = cnp->cn_proc;
|
||||
struct kern_target *kt;
|
||||
struct vnode *fvp;
|
||||
int error, i;
|
||||
|
||||
#ifdef DEBUG
|
||||
printf("kernfs_lookup(%p)\n", (void *)ap);
|
||||
printf("kernfs_lookup(dp = %p, vpp = %p, cnp = %p)\n",
|
||||
(void *)dvp, (void *)vpp, (void *)ap->a_cnp);
|
||||
printf("kernfs_lookup(%s)\n", pname);
|
||||
#endif
|
||||
|
||||
*vpp = NULLVP;
|
||||
|
||||
if (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME)
|
||||
return (EROFS);
|
||||
|
||||
VOP_UNLOCK(dvp, 0, p);
|
||||
if (cnp->cn_namelen == 1 && *pname == '.') {
|
||||
*vpp = dvp;
|
||||
VREF(dvp);
|
||||
vn_lock(dvp, LK_SHARED | LK_RETRY, p);
|
||||
return (0);
|
||||
}
|
||||
|
||||
#if 0
|
||||
if (cnp->cn_namelen == 4 && bcmp(pname, "root", 4) == 0) {
|
||||
*vpp = rootdir;
|
||||
VREF(rootdir);
|
||||
vn_lock(rootdir, LK_SHARED | LK_RETRY, p)
|
||||
return (0);
|
||||
}
|
||||
#endif
|
||||
|
||||
for (kt = kern_targets, i = 0; i < nkern_targets; kt++, i++) {
|
||||
if (cnp->cn_namelen == kt->kt_namlen &&
|
||||
bcmp(kt->kt_name, pname, cnp->cn_namelen) == 0)
|
||||
goto found;
|
||||
}
|
||||
|
||||
#ifdef DEBUG
|
||||
printf("kernfs_lookup: i = %d, failed", i);
|
||||
#endif
|
||||
|
||||
vn_lock(dvp, LK_SHARED | LK_RETRY, p);
|
||||
return (cnp->cn_nameiop == LOOKUP ? ENOENT : EROFS);
|
||||
|
||||
found:
|
||||
|
||||
#ifdef DEBUG
|
||||
printf("kernfs_lookup: allocate new vnode\n");
|
||||
#endif
|
||||
if ((error = getnewvnode(VT_KERNFS, dvp->v_mount, kernfs_vnodeop_p,
|
||||
&fvp)) != 0) {
|
||||
vn_lock(dvp, LK_SHARED | LK_RETRY, p);
|
||||
return (error);
|
||||
}
|
||||
|
||||
MALLOC(fvp->v_data, void *, sizeof(struct kernfs_node), M_TEMP,
|
||||
M_WAITOK);
|
||||
VTOKERN(fvp)->kf_kt = kt;
|
||||
fvp->v_type = kt->kt_vtype;
|
||||
vn_lock(fvp, LK_SHARED | LK_RETRY, p);
|
||||
*vpp = fvp;
|
||||
|
||||
#ifdef DEBUG
|
||||
printf("kernfs_lookup: newvp = %p\n", (void *)fvp);
|
||||
#endif
|
||||
return (0);
|
||||
}
|
||||
|
||||
static int
|
||||
kernfs_access(ap)
|
||||
struct vop_access_args /* {
|
||||
struct vnode *a_vp;
|
||||
int a_mode;
|
||||
struct ucred *a_cred;
|
||||
struct proc *a_p;
|
||||
} */ *ap;
|
||||
{
|
||||
register struct vnode *vp = ap->a_vp;
|
||||
mode_t amode = ap->a_mode;
|
||||
mode_t fmode =
|
||||
(vp->v_flag & VROOT) ? DIR_MODE : VTOKERN(vp)->kf_kt->kt_mode;
|
||||
|
||||
/* Some files are simply not modifiable. */
|
||||
if ((amode & VWRITE) && (fmode & (S_IWUSR|S_IWGRP|S_IWOTH)) == 0)
|
||||
return (EPERM);
|
||||
|
||||
return (vaccess(vp->v_tag, fmode, 0, 0, ap->a_mode, ap->a_cred, NULL));
|
||||
}
|
||||
|
||||
static int
|
||||
kernfs_getattr(ap)
|
||||
struct vop_getattr_args /* {
|
||||
struct vnode *a_vp;
|
||||
struct vattr *a_vap;
|
||||
struct ucred *a_cred;
|
||||
struct proc *a_p;
|
||||
} */ *ap;
|
||||
{
|
||||
struct vnode *vp = ap->a_vp;
|
||||
struct vattr *vap = ap->a_vap;
|
||||
int error = 0;
|
||||
char strbuf[KSTRING];
|
||||
|
||||
bzero((caddr_t) vap, sizeof(*vap));
|
||||
vattr_null(vap);
|
||||
vap->va_uid = 0;
|
||||
vap->va_gid = 0;
|
||||
vap->va_size = 0;
|
||||
vap->va_blocksize = DEV_BSIZE;
|
||||
nanotime(&vap->va_atime);
|
||||
vap->va_mtime = vap->va_atime;
|
||||
vap->va_ctime = vap->va_mtime;
|
||||
vap->va_gen = 0;
|
||||
vap->va_flags = 0;
|
||||
vap->va_rdev = 0;
|
||||
vap->va_bytes = 0;
|
||||
|
||||
if (vp->v_flag & VROOT) {
|
||||
#ifdef DEBUG
|
||||
printf("kernfs_getattr: stat rootdir\n");
|
||||
#endif
|
||||
vap->va_type = VDIR;
|
||||
vap->va_mode = DIR_MODE;
|
||||
vap->va_nlink = 2;
|
||||
vap->va_fileid = 2;
|
||||
vap->va_size = DEV_BSIZE;
|
||||
} else {
|
||||
struct kern_target *kt = VTOKERN(vp)->kf_kt;
|
||||
int nbytes;
|
||||
#ifdef DEBUG
|
||||
printf("kernfs_getattr: stat target %s\n", kt->kt_name);
|
||||
#endif
|
||||
vap->va_type = kt->kt_vtype;
|
||||
vap->va_mode = kt->kt_mode;
|
||||
vap->va_nlink = 1;
|
||||
vap->va_fileid = 1 + (kt - kern_targets) / sizeof(*kt);
|
||||
error = kernfs_xread(kt, strbuf, sizeof(strbuf), &nbytes);
|
||||
vap->va_size = nbytes;
|
||||
}
|
||||
|
||||
#ifdef DEBUG
|
||||
printf("kernfs_getattr: return error %d\n", error);
|
||||
#endif
|
||||
return (error);
|
||||
}
|
||||
|
||||
static int
|
||||
kernfs_setattr(ap)
|
||||
struct vop_setattr_args /* {
|
||||
struct vnode *a_vp;
|
||||
struct vattr *a_vap;
|
||||
struct ucred *a_cred;
|
||||
struct proc *a_p;
|
||||
} */ *ap;
|
||||
{
|
||||
|
||||
if (ap->a_vap->va_flags != VNOVAL)
|
||||
return (EOPNOTSUPP);
|
||||
|
||||
/*
|
||||
* Silently ignore attribute changes.
|
||||
* This allows for open with truncate to have no
|
||||
* effect until some data is written. I want to
|
||||
* do it this way because all writes are atomic.
|
||||
*/
|
||||
return (0);
|
||||
}
|
||||
|
||||
static int
|
||||
kernfs_read(ap)
|
||||
struct vop_read_args /* {
|
||||
struct vnode *a_vp;
|
||||
struct uio *a_uio;
|
||||
int a_ioflag;
|
||||
struct ucred *a_cred;
|
||||
} */ *ap;
|
||||
{
|
||||
struct vnode *vp = ap->a_vp;
|
||||
struct uio *uio = ap->a_uio;
|
||||
struct kern_target *kt;
|
||||
char strbuf[KSTRING];
|
||||
int off = uio->uio_offset;
|
||||
int error, len;
|
||||
|
||||
if (vp->v_type == VDIR)
|
||||
return (EOPNOTSUPP);
|
||||
|
||||
kt = VTOKERN(vp)->kf_kt;
|
||||
|
||||
#ifdef DEBUG
|
||||
printf("kern_read %s\n", kt->kt_name);
|
||||
#endif
|
||||
|
||||
len = 0;
|
||||
if ((error = kernfs_xread(kt, strbuf, sizeof(strbuf), &len)) != 0)
|
||||
return (error);
|
||||
if (len <= off)
|
||||
return (0);
|
||||
return (uiomove(&strbuf[off], len - off, uio));
|
||||
}
|
||||
|
||||
static int
|
||||
kernfs_write(ap)
|
||||
struct vop_write_args /* {
|
||||
struct vnode *a_vp;
|
||||
struct uio *a_uio;
|
||||
int a_ioflag;
|
||||
struct ucred *a_cred;
|
||||
} */ *ap;
|
||||
{
|
||||
struct vnode *vp = ap->a_vp;
|
||||
struct uio *uio = ap->a_uio;
|
||||
struct kern_target *kt;
|
||||
int error, xlen;
|
||||
char strbuf[KSTRING];
|
||||
|
||||
if (vp->v_type == VDIR)
|
||||
return (EOPNOTSUPP);
|
||||
|
||||
kt = VTOKERN(vp)->kf_kt;
|
||||
|
||||
if (uio->uio_offset != 0)
|
||||
return (EINVAL);
|
||||
|
||||
xlen = min(uio->uio_resid, KSTRING-1);
|
||||
if ((error = uiomove(strbuf, xlen, uio)) != 0)
|
||||
return (error);
|
||||
|
||||
if (uio->uio_resid != 0)
|
||||
return (EIO);
|
||||
|
||||
strbuf[xlen] = '\0';
|
||||
xlen = strlen(strbuf);
|
||||
return (kernfs_xwrite(kt, strbuf, xlen));
|
||||
}
|
||||
|
||||
static int
|
||||
kernfs_readdir(ap)
|
||||
struct vop_readdir_args /* {
|
||||
struct vnode *a_vp;
|
||||
struct uio *a_uio;
|
||||
struct ucred *a_cred;
|
||||
int *a_eofflag;
|
||||
int *a_ncookies;
|
||||
u_long **a_cookies;
|
||||
} */ *ap;
|
||||
{
|
||||
int error, i, off;
|
||||
struct uio *uio = ap->a_uio;
|
||||
struct kern_target *kt;
|
||||
struct dirent d;
|
||||
|
||||
if (ap->a_vp->v_type != VDIR)
|
||||
return (ENOTDIR);
|
||||
|
||||
off = (int)uio->uio_offset;
|
||||
if (off != uio->uio_offset || off < 0 || (u_int)off % UIO_MX != 0 ||
|
||||
uio->uio_resid < UIO_MX)
|
||||
return (EINVAL);
|
||||
|
||||
i = (u_int)off / UIO_MX;
|
||||
error = 0;
|
||||
for (kt = &kern_targets[i];
|
||||
uio->uio_resid >= UIO_MX && i < nkern_targets; kt++, i++) {
|
||||
struct dirent *dp = &d;
|
||||
#ifdef DEBUG
|
||||
printf("kernfs_readdir: i = %d\n", i);
|
||||
#endif
|
||||
|
||||
bzero((caddr_t)dp, UIO_MX);
|
||||
dp->d_namlen = kt->kt_namlen;
|
||||
bcopy(kt->kt_name, dp->d_name, kt->kt_namlen+1);
|
||||
|
||||
#ifdef DEBUG
|
||||
printf("kernfs_readdir: name = %s, len = %d\n",
|
||||
dp->d_name, dp->d_namlen);
|
||||
#endif
|
||||
/*
|
||||
* Fill in the remaining fields
|
||||
*/
|
||||
dp->d_reclen = UIO_MX;
|
||||
dp->d_fileno = i + 3;
|
||||
dp->d_type = kt->kt_type;
|
||||
/*
|
||||
* And ship to userland
|
||||
*/
|
||||
if ((error = uiomove((caddr_t)dp, UIO_MX, uio)) != 0)
|
||||
break;
|
||||
}
|
||||
|
||||
uio->uio_offset = i * UIO_MX;
|
||||
|
||||
return (error);
|
||||
}
|
||||
|
||||
static int
|
||||
kernfs_inactive(ap)
|
||||
struct vop_inactive_args /* {
|
||||
struct vnode *a_vp;
|
||||
struct proc *a_p;
|
||||
} */ *ap;
|
||||
{
|
||||
struct vnode *vp = ap->a_vp;
|
||||
|
||||
#ifdef DEBUG
|
||||
printf("kernfs_inactive(%p)\n", (void *)vp);
|
||||
#endif
|
||||
/*
|
||||
* Clear out the v_type field to avoid
|
||||
* nasty things happening in vgone().
|
||||
*/
|
||||
VOP_UNLOCK(vp, 0, ap->a_p);
|
||||
vp->v_type = VNON;
|
||||
return (0);
|
||||
}
|
||||
|
||||
static int
|
||||
kernfs_reclaim(ap)
|
||||
struct vop_reclaim_args /* {
|
||||
struct vnode *a_vp;
|
||||
} */ *ap;
|
||||
{
|
||||
struct vnode *vp = ap->a_vp;
|
||||
|
||||
#ifdef DEBUG
|
||||
printf("kernfs_reclaim(%p)\n", (void *)vp);
|
||||
#endif
|
||||
if (vp->v_data) {
|
||||
FREE(vp->v_data, M_TEMP);
|
||||
vp->v_data = 0;
|
||||
}
|
||||
return (0);
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* Print out the contents of a kernfs vnode.
|
||||
*/
|
||||
/* ARGSUSED */
|
||||
static int
|
||||
kernfs_print(ap)
|
||||
struct vop_print_args /* {
|
||||
struct vnode *a_vp;
|
||||
} */ *ap;
|
||||
{
|
||||
|
||||
printf("tag VT_KERNFS, kernfs vnode\n");
|
||||
return (0);
|
||||
}
|
||||
|
||||
/*
|
||||
* Kernfs "should never get here" operation
|
||||
*/
|
||||
static int
|
||||
kernfs_badop()
|
||||
{
|
||||
return (EIO);
|
||||
}
|
||||
|
||||
|
||||
vop_t **kernfs_vnodeop_p;
|
||||
static struct vnodeopv_entry_desc kernfs_vnodeop_entries[] = {
|
||||
{ &vop_default_desc, (vop_t *) vop_defaultop },
|
||||
{ &vop_access_desc, (vop_t *) kernfs_access },
|
||||
{ &vop_bmap_desc, (vop_t *) kernfs_badop },
|
||||
{ &vop_getattr_desc, (vop_t *) kernfs_getattr },
|
||||
{ &vop_inactive_desc, (vop_t *) kernfs_inactive },
|
||||
{ &vop_lookup_desc, (vop_t *) kernfs_lookup },
|
||||
{ &vop_pathconf_desc, (vop_t *) vop_stdpathconf },
|
||||
{ &vop_print_desc, (vop_t *) kernfs_print },
|
||||
{ &vop_read_desc, (vop_t *) kernfs_read },
|
||||
{ &vop_readdir_desc, (vop_t *) kernfs_readdir },
|
||||
{ &vop_reclaim_desc, (vop_t *) kernfs_reclaim },
|
||||
{ &vop_setattr_desc, (vop_t *) kernfs_setattr },
|
||||
{ &vop_write_desc, (vop_t *) kernfs_write },
|
||||
{ NULL, NULL }
|
||||
};
|
||||
static struct vnodeopv_desc kernfs_vnodeop_opv_desc =
|
||||
{ &kernfs_vnodeop_p, kernfs_vnodeop_entries };
|
||||
|
||||
VNODEOP_SET(kernfs_vnodeop_opv_desc);
|
@ -8,7 +8,7 @@ _random= random
|
||||
|
||||
SUBDIR= 3dfx accf_data accf_http agp aha amr an aue \
|
||||
cam ccd cd9660 coda cue dc de ed fdesc fxp if_disc if_ef \
|
||||
if_ppp if_sl if_tap if_tun ip6fw ipfilter ipfw ispfw joy kernfs kue \
|
||||
if_ppp if_sl if_tap if_tun ip6fw ipfilter ipfw ispfw joy kue \
|
||||
linux lnc md mfs mii mlx msdos ncp netgraph nfs ntfs nullfs \
|
||||
nwfs pcn portal procfs ${_random} \
|
||||
rl rp sf sis sk sn sound ste sym syscons sysvipc ti tl twe tx \
|
||||
|
@ -1,9 +0,0 @@
|
||||
# $FreeBSD$
|
||||
|
||||
.PATH: ${.CURDIR}/../../miscfs/kernfs
|
||||
KMOD= kernfs
|
||||
SRCS= vnode_if.h \
|
||||
kernfs_vfsops.c kernfs_vnops.c
|
||||
NOMAN=
|
||||
|
||||
.include <bsd.kmod.mk>
|
Loading…
Reference in New Issue
Block a user