2 * Copyright (c) 1993 Jan-Simon Pendry
4 * The Regents of the University of California. All rights reserved.
6 * This code is derived from software contributed to Berkeley by
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10 * modification, are permitted provided that the following conditions
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18 * must display the following acknowledgement:
19 * This product includes software developed by the University of
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21 * 4. Neither the name of the University nor the names of its contributors
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37 * @(#)procfs_vfsops.c 8.7 (Berkeley) 5/10/95
39 * $FreeBSD: src/sys/miscfs/procfs/procfs_vfsops.c,v 1.32.2.1 2001/10/15 20:42:01 des Exp $
43 * procfs VFS interface
46 #include <sys/param.h>
47 #include <sys/systm.h>
48 #include <sys/kernel.h>
50 #include <sys/mount.h>
51 #include <sys/vnode.h>
52 #include <miscfs/procfs/procfs.h>
54 static int procfs_mount __P((struct mount *mp, char *path, caddr_t data,
55 struct nameidata *ndp, struct proc *p));
56 static int procfs_statfs __P((struct mount *mp, struct statfs *sbp,
58 static int procfs_unmount __P((struct mount *mp, int mntflags,
68 procfs_mount(mp, path, data, ndp, p)
72 struct nameidata *ndp;
78 if (mp->mnt_flag & MNT_UPDATE)
81 if (mp->mnt_vfc->vfc_refcount == 1 && (error = at_exit(procfs_exit))) {
82 printf("procfs: cannot register procfs_exit with at_exit\n");
86 mp->mnt_flag |= MNT_LOCAL;
90 (void) copyinstr(path, (caddr_t)mp->mnt_stat.f_mntonname, MNAMELEN, &size);
91 bzero(mp->mnt_stat.f_mntonname + size, MNAMELEN - size);
93 size = sizeof("procfs") - 1;
94 bcopy("procfs", mp->mnt_stat.f_mntfromname, size);
95 bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size);
96 (void)procfs_statfs(mp, &mp->mnt_stat, p);
102 * unmount system call
105 procfs_unmount(mp, mntflags, p)
113 if (mntflags & MNT_FORCE)
116 error = vflush(mp, 0, flags);
120 if (mp->mnt_vfc->vfc_refcount == 1)
121 rm_at_exit(procfs_exit);
132 return (procfs_allocvp(mp, vpp, 0, Proot));
136 * Get file system statistics.
139 procfs_statfs(mp, sbp, p)
144 sbp->f_bsize = PAGE_SIZE;
145 sbp->f_iosize = PAGE_SIZE;
146 sbp->f_blocks = 1; /* avoid divide by zero in some df's */
149 sbp->f_files = maxproc; /* approx */
150 sbp->f_ffree = maxproc - nprocs; /* approx */
152 if (sbp != &mp->mnt_stat) {
153 sbp->f_type = mp->mnt_vfc->vfc_typenum;
154 bcopy(&mp->mnt_stat.f_fsid, &sbp->f_fsid, sizeof(sbp->f_fsid));
155 bcopy(mp->mnt_stat.f_mntonname, sbp->f_mntonname, MNAMELEN);
156 bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN);
162 static struct vfsops procfs_vfsops = {
179 VFS_SET(procfs_vfsops, procfs, VFCF_SYNTHETIC);
180 MODULE_VERSION(procfs, 1);