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procfs_vfsops.c revision 1.38
      1  1.38  jdolecek /*	$NetBSD: procfs_vfsops.c,v 1.38 2001/01/25 12:44:56 jdolecek Exp $	*/
      2  1.18       cgd 
      3   1.1        pk /*
      4   1.9       cgd  * Copyright (c) 1993 Jan-Simon Pendry
      5  1.16   mycroft  * Copyright (c) 1993
      6  1.16   mycroft  *	The Regents of the University of California.  All rights reserved.
      7   1.2        pk  *
      8   1.9       cgd  * This code is derived from software contributed to Berkeley by
      9   1.9       cgd  * Jan-Simon Pendry.
     10   1.9       cgd  *
     11   1.2        pk  * Redistribution and use in source and binary forms, with or without
     12   1.2        pk  * modification, are permitted provided that the following conditions
     13   1.2        pk  * are met:
     14   1.2        pk  * 1. Redistributions of source code must retain the above copyright
     15   1.2        pk  *    notice, this list of conditions and the following disclaimer.
     16   1.2        pk  * 2. Redistributions in binary form must reproduce the above copyright
     17   1.2        pk  *    notice, this list of conditions and the following disclaimer in the
     18   1.2        pk  *    documentation and/or other materials provided with the distribution.
     19   1.2        pk  * 3. All advertising materials mentioning features or use of this software
     20   1.2        pk  *    must display the following acknowledgement:
     21   1.9       cgd  *	This product includes software developed by the University of
     22   1.9       cgd  *	California, Berkeley and its contributors.
     23   1.9       cgd  * 4. Neither the name of the University nor the names of its contributors
     24   1.9       cgd  *    may be used to endorse or promote products derived from this software
     25   1.9       cgd  *    without specific prior written permission.
     26   1.9       cgd  *
     27   1.9       cgd  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     28   1.9       cgd  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     29   1.9       cgd  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     30   1.9       cgd  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     31   1.9       cgd  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     32   1.9       cgd  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     33   1.9       cgd  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     34   1.9       cgd  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     35   1.9       cgd  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     36   1.9       cgd  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     37   1.9       cgd  * SUCH DAMAGE.
     38   1.9       cgd  *
     39  1.28      fvdl  *	@(#)procfs_vfsops.c	8.7 (Berkeley) 5/10/95
     40   1.2        pk  */
     41   1.2        pk 
     42   1.2        pk /*
     43   1.9       cgd  * procfs VFS interface
     44   1.1        pk  */
     45  1.29  jonathan 
     46  1.29  jonathan #if defined(_KERNEL) && !defined(_LKM)
     47  1.29  jonathan #include "opt_compat_netbsd.h"
     48  1.29  jonathan #endif
     49   1.1        pk 
     50   1.8   mycroft #include <sys/param.h>
     51   1.8   mycroft #include <sys/time.h>
     52   1.8   mycroft #include <sys/kernel.h>
     53  1.25  christos #include <sys/systm.h>
     54   1.8   mycroft #include <sys/proc.h>
     55   1.8   mycroft #include <sys/buf.h>
     56   1.9       cgd #include <sys/syslog.h>
     57   1.8   mycroft #include <sys/mount.h>
     58   1.8   mycroft #include <sys/signalvar.h>
     59   1.8   mycroft #include <sys/vnode.h>
     60  1.32      fvdl #include <sys/malloc.h>
     61  1.35       mrg 
     62   1.9       cgd #include <miscfs/procfs/procfs.h>
     63  1.35       mrg 
     64  1.35       mrg #include <uvm/uvm_extern.h>			/* for PAGE_SIZE */
     65   1.1        pk 
     66  1.28      fvdl void	procfs_init __P((void));
     67  1.33  jdolecek void	procfs_done __P((void));
     68  1.26       cgd int	procfs_mount __P((struct mount *, const char *, void *,
     69  1.25  christos 			  struct nameidata *, struct proc *));
     70  1.25  christos int	procfs_start __P((struct mount *, int, struct proc *));
     71  1.25  christos int	procfs_unmount __P((struct mount *, int, struct proc *));
     72  1.25  christos int	procfs_quotactl __P((struct mount *, int, uid_t, caddr_t,
     73  1.25  christos 			     struct proc *));
     74  1.25  christos int	procfs_statfs __P((struct mount *, struct statfs *, struct proc *));
     75  1.25  christos int	procfs_sync __P((struct mount *, int, struct ucred *, struct proc *));
     76  1.25  christos int	procfs_vget __P((struct mount *, ino_t, struct vnode **));
     77  1.31  wrstuden int	procfs_fhtovp __P((struct mount *, struct fid *, struct vnode **));
     78  1.31  wrstuden int	procfs_checkexp __P((struct mount *, struct mbuf *, int *,
     79  1.31  wrstuden 			   struct ucred **));
     80  1.25  christos int	procfs_vptofh __P((struct vnode *, struct fid *));
     81  1.28      fvdl int	procfs_sysctl __P((int *, u_int, void *, size_t *, void *, size_t,
     82  1.28      fvdl 			   struct proc *));
     83   1.1        pk /*
     84   1.1        pk  * VFS Operations.
     85   1.1        pk  *
     86   1.1        pk  * mount system call
     87   1.1        pk  */
     88   1.1        pk /* ARGSUSED */
     89  1.25  christos int
     90   1.9       cgd procfs_mount(mp, path, data, ndp, p)
     91   1.9       cgd 	struct mount *mp;
     92  1.26       cgd 	const char *path;
     93  1.26       cgd 	void *data;
     94   1.1        pk 	struct nameidata *ndp;
     95   1.1        pk 	struct proc *p;
     96   1.1        pk {
     97  1.23   mycroft 	size_t size;
     98  1.32      fvdl 	struct procfsmount *pmnt;
     99  1.36      fvdl 	struct procfs_args args;
    100  1.36      fvdl 	int error;
    101   1.1        pk 
    102   1.9       cgd 	if (UIO_MX & (UIO_MX-1)) {
    103   1.9       cgd 		log(LOG_ERR, "procfs: invalid directory entry size");
    104   1.9       cgd 		return (EINVAL);
    105   1.1        pk 	}
    106   1.1        pk 
    107   1.9       cgd 	if (mp->mnt_flag & MNT_UPDATE)
    108   1.9       cgd 		return (EOPNOTSUPP);
    109   1.9       cgd 
    110  1.36      fvdl 	if (data != NULL) {
    111  1.36      fvdl 		error = copyin(data, &args, sizeof args);
    112  1.36      fvdl 		if (error != 0)
    113  1.36      fvdl 			return error;
    114  1.36      fvdl 
    115  1.36      fvdl 		if (args.version != PROCFS_ARGSVERSION)
    116  1.36      fvdl 			return EINVAL;
    117  1.36      fvdl 	} else
    118  1.36      fvdl 		args.flags = 0;
    119  1.36      fvdl 
    120  1.16   mycroft 	mp->mnt_flag |= MNT_LOCAL;
    121  1.32      fvdl 	pmnt = (struct procfsmount *) malloc(sizeof(struct procfsmount),
    122  1.32      fvdl 	    M_UFSMNT, M_WAITOK);   /* XXX need new malloc type */
    123  1.32      fvdl 
    124  1.32      fvdl 	mp->mnt_data = (qaddr_t)pmnt;
    125  1.34     assar 	vfs_getnewfsid(mp);
    126   1.9       cgd 
    127  1.16   mycroft 	(void) copyinstr(path, mp->mnt_stat.f_mntonname, MNAMELEN, &size);
    128  1.30     perry 	memset(mp->mnt_stat.f_mntonname + size, 0, MNAMELEN - size);
    129  1.30     perry 	memset(mp->mnt_stat.f_mntfromname, 0, MNAMELEN);
    130  1.30     perry 	memcpy(mp->mnt_stat.f_mntfromname, "procfs", sizeof("procfs"));
    131  1.32      fvdl 
    132  1.32      fvdl 	pmnt->pmnt_exechook = exechook_establish(procfs_revoke_vnodes, mp);
    133  1.36      fvdl 	pmnt->pmnt_flags = args.flags;
    134  1.32      fvdl 
    135   1.1        pk 	return (0);
    136   1.1        pk }
    137   1.1        pk 
    138   1.1        pk /*
    139   1.1        pk  * unmount system call
    140   1.1        pk  */
    141  1.25  christos int
    142   1.9       cgd procfs_unmount(mp, mntflags, p)
    143   1.1        pk 	struct mount *mp;
    144   1.1        pk 	int mntflags;
    145   1.1        pk 	struct proc *p;
    146   1.1        pk {
    147   1.9       cgd 	int error;
    148   1.9       cgd 	int flags = 0;
    149   1.9       cgd 
    150  1.28      fvdl 	if (mntflags & MNT_FORCE)
    151   1.9       cgd 		flags |= FORCECLOSE;
    152   1.9       cgd 
    153  1.25  christos 	if ((error = vflush(mp, 0, flags)) != 0)
    154   1.9       cgd 		return (error);
    155   1.9       cgd 
    156  1.32      fvdl 	exechook_disestablish(VFSTOPROC(mp)->pmnt_exechook);
    157  1.32      fvdl 
    158  1.32      fvdl 	free(mp->mnt_data, M_UFSMNT);
    159  1.32      fvdl 	mp->mnt_data = 0;
    160  1.32      fvdl 
    161   1.1        pk 	return (0);
    162   1.1        pk }
    163   1.1        pk 
    164  1.25  christos int
    165   1.9       cgd procfs_root(mp, vpp)
    166   1.1        pk 	struct mount *mp;
    167   1.1        pk 	struct vnode **vpp;
    168   1.1        pk {
    169   1.1        pk 
    170  1.16   mycroft 	return (procfs_allocvp(mp, vpp, 0, Proot));
    171   1.1        pk }
    172   1.1        pk 
    173   1.1        pk /* ARGSUSED */
    174  1.25  christos int
    175   1.9       cgd procfs_start(mp, flags, p)
    176   1.1        pk 	struct mount *mp;
    177   1.1        pk 	int flags;
    178   1.1        pk 	struct proc *p;
    179   1.1        pk {
    180   1.9       cgd 
    181   1.9       cgd 	return (0);
    182   1.1        pk }
    183   1.1        pk 
    184   1.1        pk /*
    185   1.1        pk  * Get file system statistics.
    186   1.1        pk  */
    187  1.25  christos int
    188   1.9       cgd procfs_statfs(mp, sbp, p)
    189   1.1        pk 	struct mount *mp;
    190   1.1        pk 	struct statfs *sbp;
    191   1.1        pk 	struct proc *p;
    192   1.1        pk {
    193  1.16   mycroft 
    194  1.16   mycroft 	sbp->f_bsize = PAGE_SIZE;
    195  1.14       cgd 	sbp->f_iosize = PAGE_SIZE;
    196   1.9       cgd 	sbp->f_blocks = 1;	/* avoid divide by zero in some df's */
    197   1.4        pk 	sbp->f_bfree = 0;
    198   1.1        pk 	sbp->f_bavail = 0;
    199   1.9       cgd 	sbp->f_files = maxproc;			/* approx */
    200   1.9       cgd 	sbp->f_ffree = maxproc - nprocs;	/* approx */
    201  1.28      fvdl #ifdef COMPAT_09
    202  1.28      fvdl 	sbp->f_type = 10;
    203  1.28      fvdl #else
    204  1.28      fvdl 	sbp->f_type = 0;
    205  1.28      fvdl #endif
    206   1.9       cgd 	if (sbp != &mp->mnt_stat) {
    207  1.30     perry 		memcpy(&sbp->f_fsid, &mp->mnt_stat.f_fsid, sizeof(sbp->f_fsid));
    208  1.30     perry 		memcpy(sbp->f_mntonname, mp->mnt_stat.f_mntonname, MNAMELEN);
    209  1.30     perry 		memcpy(sbp->f_mntfromname, mp->mnt_stat.f_mntfromname, MNAMELEN);
    210   1.9       cgd 	}
    211  1.22   mycroft 	strncpy(sbp->f_fstypename, mp->mnt_op->vfs_name, MFSNAMELEN);
    212   1.9       cgd 	return (0);
    213   1.1        pk }
    214   1.1        pk 
    215  1.25  christos /*ARGSUSED*/
    216  1.25  christos int
    217   1.9       cgd procfs_quotactl(mp, cmds, uid, arg, p)
    218   1.1        pk 	struct mount *mp;
    219   1.1        pk 	int cmds;
    220   1.1        pk 	uid_t uid;
    221   1.1        pk 	caddr_t arg;
    222   1.1        pk 	struct proc *p;
    223   1.1        pk {
    224   1.9       cgd 
    225   1.9       cgd 	return (EOPNOTSUPP);
    226   1.1        pk }
    227   1.1        pk 
    228  1.25  christos /*ARGSUSED*/
    229  1.25  christos int
    230  1.25  christos procfs_sync(mp, waitfor, uc, p)
    231   1.1        pk 	struct mount *mp;
    232   1.1        pk 	int waitfor;
    233  1.25  christos 	struct ucred *uc;
    234  1.25  christos 	struct proc *p;
    235   1.1        pk {
    236   1.9       cgd 
    237   1.9       cgd 	return (0);
    238   1.1        pk }
    239   1.1        pk 
    240  1.25  christos /*ARGSUSED*/
    241  1.25  christos int
    242  1.16   mycroft procfs_vget(mp, ino, vpp)
    243  1.16   mycroft 	struct mount *mp;
    244  1.16   mycroft 	ino_t ino;
    245  1.16   mycroft 	struct vnode **vpp;
    246  1.16   mycroft {
    247  1.16   mycroft 
    248  1.16   mycroft 	return (EOPNOTSUPP);
    249  1.16   mycroft }
    250  1.16   mycroft 
    251  1.25  christos /*ARGSUSED*/
    252  1.25  christos int
    253  1.31  wrstuden procfs_fhtovp(mp, fhp, vpp)
    254   1.9       cgd 	struct mount *mp;
    255   1.1        pk 	struct fid *fhp;
    256  1.31  wrstuden 	struct vnode **vpp;
    257  1.31  wrstuden {
    258  1.31  wrstuden 
    259  1.31  wrstuden 	return (EINVAL);
    260  1.31  wrstuden }
    261  1.31  wrstuden 
    262  1.31  wrstuden /*ARGSUSED*/
    263  1.31  wrstuden int
    264  1.31  wrstuden procfs_checkexp(mp, mb, what, anon)
    265  1.31  wrstuden 	struct mount *mp;
    266  1.25  christos 	struct mbuf *mb;
    267  1.25  christos 	int *what;
    268  1.25  christos 	struct ucred **anon;
    269   1.1        pk {
    270  1.16   mycroft 
    271  1.16   mycroft 	return (EINVAL);
    272   1.1        pk }
    273   1.1        pk 
    274  1.25  christos /*ARGSUSED*/
    275  1.25  christos int
    276   1.9       cgd procfs_vptofh(vp, fhp)
    277   1.1        pk 	struct vnode *vp;
    278   1.1        pk 	struct fid *fhp;
    279   1.1        pk {
    280  1.16   mycroft 
    281  1.16   mycroft 	return (EINVAL);
    282   1.1        pk }
    283   1.1        pk 
    284  1.25  christos void
    285   1.9       cgd procfs_init()
    286   1.1        pk {
    287  1.32      fvdl 	procfs_hashinit();
    288   1.1        pk }
    289   1.9       cgd 
    290  1.33  jdolecek void
    291  1.33  jdolecek procfs_done()
    292  1.33  jdolecek {
    293  1.33  jdolecek 	procfs_hashdone();
    294  1.33  jdolecek }
    295  1.33  jdolecek 
    296  1.28      fvdl int
    297  1.28      fvdl procfs_sysctl(name, namelen, oldp, oldlenp, newp, newlen, p)
    298  1.28      fvdl 	int *name;
    299  1.28      fvdl 	u_int namelen;
    300  1.28      fvdl 	void *oldp;
    301  1.28      fvdl 	size_t *oldlenp;
    302  1.28      fvdl 	void *newp;
    303  1.28      fvdl 	size_t newlen;
    304  1.28      fvdl 	struct proc *p;
    305  1.28      fvdl {
    306  1.28      fvdl 	return (EOPNOTSUPP);
    307  1.28      fvdl }
    308  1.28      fvdl 
    309  1.37  jdolecek extern const struct vnodeopv_desc procfs_vnodeop_opv_desc;
    310  1.27   thorpej 
    311  1.37  jdolecek const struct vnodeopv_desc * const procfs_vnodeopv_descs[] = {
    312  1.27   thorpej 	&procfs_vnodeop_opv_desc,
    313  1.27   thorpej 	NULL,
    314  1.27   thorpej };
    315  1.27   thorpej 
    316   1.9       cgd struct vfsops procfs_vfsops = {
    317  1.12       cgd 	MOUNT_PROCFS,
    318   1.9       cgd 	procfs_mount,
    319   1.9       cgd 	procfs_start,
    320   1.9       cgd 	procfs_unmount,
    321   1.9       cgd 	procfs_root,
    322   1.9       cgd 	procfs_quotactl,
    323   1.9       cgd 	procfs_statfs,
    324   1.9       cgd 	procfs_sync,
    325  1.16   mycroft 	procfs_vget,
    326   1.9       cgd 	procfs_fhtovp,
    327   1.9       cgd 	procfs_vptofh,
    328   1.9       cgd 	procfs_init,
    329  1.33  jdolecek 	procfs_done,
    330  1.28      fvdl 	procfs_sysctl,
    331  1.27   thorpej 	NULL,				/* vfs_mountroot */
    332  1.31  wrstuden 	procfs_checkexp,
    333  1.27   thorpej 	procfs_vnodeopv_descs,
    334   1.9       cgd };
    335