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Diffstat (limited to 'sys/miscfs/kernfs/kernfs_vnops.c')
-rw-r--r--sys/miscfs/kernfs/kernfs_vnops.c610
1 files changed, 0 insertions, 610 deletions
diff --git a/sys/miscfs/kernfs/kernfs_vnops.c b/sys/miscfs/kernfs/kernfs_vnops.c
deleted file mode 100644
index 72b8e7804d0a..000000000000
--- a/sys/miscfs/kernfs/kernfs_vnops.c
+++ /dev/null
@@ -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);
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-06 08:34:58 +0000