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Retire kernfs (kernel part).

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This commit is contained in:
Dag-Erling Smørgrav 2000-12-28 12:17:35 +00:00
parent 88b471a108
commit dd488b6dd8
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=70426
12 changed files with 2 additions and 921 deletions
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1
sys/boot/forth/loader.conf
View File

@ -85,7 +85,6 @@ module_path="/boot/kernel;/boot/modules;/modules" # Set the module search path
cd9660_load="NO" # ISO 9660 filesystem
coda_load="NO" # CODA filesystem
fdesc_load="NO" # Filedescriptors filesystem
kernfs_load="NO" # Kernel filesystem
mfs_load="NO" # Memory filesystem
msdos_load="NO" # FAT-12/16/32
nfs_load="NO" # NFS

1
sys/conf/NOTES
View File

@ -667,7 +667,6 @@ options NFS #Network File System
#options NFS_NOSERVER #Disable the NFS-server code.
options CD9660 #ISO 9660 filesystem
options FDESC #File descriptor filesystem
options KERNFS #Kernel filesystem
options MSDOSFS #MS DOS File System (FAT, FAT32)
options NTFS #NT File System
options NULLFS #NULL filesystem

2
sys/conf/files
View File

@ -737,8 +737,6 @@ miscfs/deadfs/dead_vnops.c standard
miscfs/fdesc/fdesc_vfsops.c optional fdesc
miscfs/fdesc/fdesc_vnops.c optional fdesc
miscfs/fifofs/fifo_vnops.c standard
miscfs/kernfs/kernfs_vfsops.c optional kernfs
miscfs/kernfs/kernfs_vnops.c optional kernfs
miscfs/nullfs/null_subr.c optional nullfs
miscfs/nullfs/null_vfsops.c optional nullfs
miscfs/nullfs/null_vnops.c optional nullfs

1
sys/conf/options
View File

@ -107,7 +107,6 @@ INCLUDE_CONFIG_FILE opt_config.h
# options in a never-included header.
EXT2FS opt_dontuse.h
FDESC opt_dontuse.h
KERNFS opt_dontuse.h
MFS opt_dontuse.h
MSDOSFS opt_dontuse.h
NULLFS opt_dontuse.h

1
sys/i386/conf/NOTES
View File

@ -667,7 +667,6 @@ options NFS #Network File System
#options NFS_NOSERVER #Disable the NFS-server code.
options CD9660 #ISO 9660 filesystem
options FDESC #File descriptor filesystem
options KERNFS #Kernel filesystem
options MSDOSFS #MS DOS File System (FAT, FAT32)
options NTFS #NT File System
options NULLFS #NULL filesystem

2
sys/kern/Make.tags.inc
View File

@ -34,7 +34,6 @@ COMM= ${SYS}/conf/*.[ch] \
${SYS}/miscfs/devfs/*.[ch] \
${SYS}/miscfs/fdesc/*.[ch] \
${SYS}/miscfs/fifofs/*.[ch] \
${SYS}/miscfs/kernfs/*.[ch] \
${SYS}/miscfs/nullfs/*.[ch] \
${SYS}/miscfs/portal/*.[ch] \
${SYS}/miscfs/procfs/*.[ch] \
@ -98,7 +97,6 @@ COMMDIR2= ${SYS}/dev/advansys \
${SYS}/miscfs/devfs \
${SYS}/miscfs/fdesc \
${SYS}/miscfs/fifofs \
${SYS}/miscfs/kernfs \
${SYS}/miscfs/nullfs \
${SYS}/miscfs/portal \
${SYS}/miscfs/procfs \

2
sys/kern/Makefile
View File

@ -35,7 +35,7 @@ DGEN= conf \
dev dev/scsi \
hp hp/dev hp/hpux \
kern libkern \
miscfs miscfs/deadfs miscfs/fdesc miscfs/fifofs miscfs/kernfs \
miscfs miscfs/deadfs miscfs/fdesc miscfs/fifofs \
miscfs/lofs miscfs/nullfs miscfs/portal miscfs/procfs \
miscfs/specfs miscfs/umapfs miscfs/union \
net netccitt netinet netiso netns nfs scripts sys \

55
sys/miscfs/kernfs/kernfs.h
View File

@ -1,55 +0,0 @@
/*
* 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.
*
* @(#)kernfs.h 8.6 (Berkeley) 3/29/95
* $FreeBSD$
*/
#define _PATH_KERNFS "/kern" /* Default mountpoint */
#ifdef _KERNEL
struct kernfs_mount {
struct vnode *kf_root; /* Root node */
};
struct kernfs_node {
struct kern_target *kf_kt;
};
#define VFSTOKERNFS(mp) ((struct kernfs_mount *)((mp)->mnt_data))
#define VTOKERN(vp) ((struct kernfs_node *)(vp)->v_data)
extern vop_t **kernfs_vnodeop_p;
#endif /* _KERNEL */

237
sys/miscfs/kernfs/kernfs_vfsops.c
View File

@ -1,237 +0,0 @@
/*
* Copyright (c) 1992, 1993, 1995
* 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.
*
* @(#)kernfs_vfsops.c 8.10 (Berkeley) 5/14/95
* $FreeBSD$
*/
/*
* Kernel params Filesystem
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/conf.h>
#include <sys/vnode.h>
#include <sys/mount.h>
#include <sys/malloc.h>
#include <miscfs/kernfs/kernfs.h>
static MALLOC_DEFINE(M_KERNFSMNT, "KERNFS mount", "KERNFS mount structure");
static int kernfs_mount __P((struct mount *mp, char *path, caddr_t data,
struct nameidata *ndp, struct proc *p));
static int kernfs_unmount __P((struct mount *mp, int mntflags,
struct proc *p));
static int kernfs_root __P((struct mount *mp, struct vnode **vpp));
static int kernfs_statfs __P((struct mount *mp, struct statfs *sbp,
struct proc *p));
/*
* Mount the Kernel params filesystem
*/
static int
kernfs_mount(mp, path, data, ndp, p)
struct mount *mp;
char *path;
caddr_t data;
struct nameidata *ndp;
struct proc *p;
{
int error = 0;
size_t size;
struct kernfs_mount *fmp;
struct vnode *rvp;
#ifdef DEBUG
printf("kernfs_mount(mp = %p)\n", (void *)mp);
#endif
/*
* Update is a no-op
*/
if (mp->mnt_flag & MNT_UPDATE)
return (EOPNOTSUPP);
MALLOC(fmp, struct kernfs_mount *, sizeof(struct kernfs_mount),
M_KERNFSMNT, M_WAITOK); /* XXX */
error = getnewvnode(VT_KERNFS, mp, kernfs_vnodeop_p, &rvp); /* XXX */
if (error) {
FREE(fmp, M_KERNFSMNT);
return (error);
}
rvp->v_type = VDIR;
rvp->v_flag |= VROOT;
#ifdef DEBUG
printf("kernfs_mount: root vp = %p\n", (void *)rvp);
#endif
fmp->kf_root = rvp;
mp->mnt_flag |= MNT_LOCAL;
mp->mnt_data = (qaddr_t) fmp;
vfs_getnewfsid(mp);
(void) copyinstr(path, mp->mnt_stat.f_mntonname, MNAMELEN - 1, &size);
bzero(mp->mnt_stat.f_mntonname + size, MNAMELEN - size);
bzero(mp->mnt_stat.f_mntfromname, MNAMELEN);
bcopy("kernfs", mp->mnt_stat.f_mntfromname, sizeof("kernfs"));
(void)kernfs_statfs(mp, &mp->mnt_stat, p);
#ifdef DEBUG
printf("kernfs_mount: at %s\n", mp->mnt_stat.f_mntonname);
#endif
return (0);
}
static int
kernfs_unmount(mp, mntflags, p)
struct mount *mp;
int mntflags;
struct proc *p;
{
int error;
int flags = 0;
struct vnode *rootvp = VFSTOKERNFS(mp)->kf_root;
#ifdef DEBUG
printf("kernfs_unmount(mp = %p)\n", (void *)mp);
#endif
if (mntflags & MNT_FORCE)
flags |= FORCECLOSE;
/*
* Clear out buffer cache. I don't think we
* ever get anything cached at this level at the
* moment, but who knows...
*/
if (rootvp->v_usecount > 1)
return (EBUSY);
#ifdef DEBUG
printf("kernfs_unmount: calling vflush\n");
#endif
error = vflush(mp, rootvp, flags);
if (error)
return (error);
#ifdef DEBUG
vprint("kernfs root", rootvp);
#endif
/*
* Release reference on underlying root vnode
*/
vrele(rootvp);
/*
* And blow it away for future re-use
*/
vgone(rootvp);
/*
* Finally, throw away the kernfs_mount structure
*/
free(mp->mnt_data, M_KERNFSMNT); /* XXX */
mp->mnt_data = 0;
return 0;
}
static int
kernfs_root(mp, vpp)
struct mount *mp;
struct vnode **vpp;
{
struct proc *p = curproc; /* XXX */
struct vnode *vp;
#ifdef DEBUG
printf("kernfs_root(mp = %p)\n", (void *)mp);
#endif
/*
* Return locked reference to root.
*/
vp = VFSTOKERNFS(mp)->kf_root;
VREF(vp);
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p);
*vpp = vp;
return (0);
}
static int
kernfs_statfs(mp, sbp, p)
struct mount *mp;
struct statfs *sbp;
struct proc *p;
{
#ifdef DEBUG
printf("kernfs_statfs(mp = %p)\n", (void *)mp);
#endif
sbp->f_flags = 0;
sbp->f_bsize = DEV_BSIZE;
sbp->f_iosize = DEV_BSIZE;
sbp->f_blocks = 2; /* 1K to keep df happy */
sbp->f_bfree = 0;
sbp->f_bavail = 0;
sbp->f_files = 0;
sbp->f_ffree = 0;
if (sbp != &mp->mnt_stat) {
sbp->f_type = mp->mnt_vfc->vfc_typenum;
bcopy(&mp->mnt_stat.f_fsid, &sbp->f_fsid, sizeof(sbp->f_fsid));
bcopy(mp->mnt_stat.f_mntonname, sbp->f_mntonname, MNAMELEN);
bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN);
}
return (0);
}
static struct vfsops kernfs_vfsops = {
kernfs_mount,
vfs_stdstart,
kernfs_unmount,
kernfs_root,
vfs_stdquotactl,
kernfs_statfs,
vfs_stdsync,
vfs_stdvget,
vfs_stdfhtovp,
vfs_stdcheckexp,
vfs_stdvptofh,
vfs_stdinit,
vfs_stduninit,
vfs_stdextattrctl,
};
VFS_SET(kernfs_vfsops, kernfs, VFCF_SYNTHETIC);

610
sys/miscfs/kernfs/kernfs_vnops.c
View File

@ -1,610 +0,0 @@
/*
* 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.
*
* @(#)kernfs_vnops.c 8.15 (Berkeley) 5/21/95
* $FreeBSD$
*/
/*
* Kernel parameter filesystem (/kern)
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/vmmeter.h>
#include <sys/time.h>
#include <sys/vnode.h>
#include <sys/malloc.h>
#include <sys/stat.h>
#include <sys/mount.h>
#include <sys/namei.h>
#include <sys/dirent.h>
#include <sys/resource.h>
#include <miscfs/kernfs/kernfs.h>
#define KSTRING 256 /* Largest I/O available via this filesystem */
#define UIO_MX 32
#define READ_MODE (S_IRUSR|S_IRGRP|S_IROTH)
#define WRITE_MODE (S_IWUSR|S_IRUSR|S_IRGRP|S_IROTH)
#define DIR_MODE (S_IRUSR|S_IXUSR|S_IRGRP|S_IXGRP|S_IROTH|S_IXOTH)
static struct kern_target {
u_char kt_type;
u_char kt_namlen;
char *kt_name;
void *kt_data;
#define KTT_NULL 1
#define KTT_TIME 5
#define KTT_INT 17
#define KTT_STRING 31
#define KTT_HOSTNAME 47
#define KTT_BOOTFILE 49
#define KTT_AVENRUN 53
u_char kt_tag;
u_char kt_vtype;
mode_t kt_mode;
} kern_targets[] = {
/* NOTE: The name must be less than UIO_MX-16 chars in length */
#define N(s) sizeof(s)-1, s
/* 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);

2
sys/modules/Makefile
View File

@ -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 \

9
sys/modules/kernfs/Makefile
View File

@ -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>