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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19 * This product includes software developed by the University of
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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 $
40 * $DragonFly: src/sys/vfs/procfs/procfs_vfsops.c,v 1.6 2004/05/02 03:05:11 cpressey Exp $
44 * procfs VFS interface
47 #include <sys/param.h>
48 #include <sys/systm.h>
49 #include <sys/kernel.h>
51 #include <sys/mount.h>
52 #include <sys/vnode.h>
53 #include <vfs/procfs/procfs.h>
55 static int procfs_mount (struct mount *mp, char *path, caddr_t data,
56 struct nameidata *ndp, struct thread *td);
57 static int procfs_statfs (struct mount *mp, struct statfs *sbp,
59 static int procfs_unmount (struct mount *mp, int mntflags,
69 procfs_mount(struct mount *mp, char *path, caddr_t data, struct nameidata *ndp,
75 if (mp->mnt_flag & MNT_UPDATE)
78 if (mp->mnt_vfc->vfc_refcount == 1 && (error = at_exit(procfs_exit))) {
79 printf("procfs: cannot register procfs_exit with at_exit\n");
83 mp->mnt_flag |= MNT_LOCAL;
87 (void) copyinstr(path, (caddr_t)mp->mnt_stat.f_mntonname, MNAMELEN, &size);
88 bzero(mp->mnt_stat.f_mntonname + size, MNAMELEN - size);
90 size = sizeof("procfs") - 1;
91 bcopy("procfs", mp->mnt_stat.f_mntfromname, size);
92 bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size);
93 (void)procfs_statfs(mp, &mp->mnt_stat, td);
102 procfs_unmount(struct mount *mp, int mntflags, struct thread *td)
107 if (mntflags & MNT_FORCE)
110 error = vflush(mp, 0, flags);
114 if (mp->mnt_vfc->vfc_refcount == 1)
115 rm_at_exit(procfs_exit);
121 procfs_root(struct mount *mp, struct vnode **vpp)
124 return (procfs_allocvp(mp, vpp, 0, Proot));
128 * Get file system statistics.
131 procfs_statfs(struct mount *mp, struct statfs *sbp, struct thread *td)
133 sbp->f_bsize = PAGE_SIZE;
134 sbp->f_iosize = PAGE_SIZE;
135 sbp->f_blocks = 1; /* avoid divide by zero in some df's */
138 sbp->f_files = maxproc; /* approx */
139 sbp->f_ffree = maxproc - nprocs; /* approx */
141 if (sbp != &mp->mnt_stat) {
142 sbp->f_type = mp->mnt_vfc->vfc_typenum;
143 bcopy(&mp->mnt_stat.f_fsid, &sbp->f_fsid, sizeof(sbp->f_fsid));
144 bcopy(mp->mnt_stat.f_mntonname, sbp->f_mntonname, MNAMELEN);
145 bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN);
151 static struct vfsops procfs_vfsops = {
168 VFS_SET(procfs_vfsops, procfs, VFCF_SYNTHETIC);
169 MODULE_VERSION(procfs, 1);