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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19 * This product includes software developed by the University of
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37 * @(#)procfs_vfsops.c 8.7 (Berkeley) 5/10/95
43 * procfs VFS interface
46 #include <sys/param.h>
47 #include <sys/systm.h>
49 #include <sys/kernel.h>
52 #include <sys/syslog.h>
53 #include <sys/mount.h>
54 #include <sys/signalvar.h>
55 #include <sys/vnode.h>
56 #include <miscfs/procfs/procfs.h>
57 #include <vm/vm.h> /* for PAGE_SIZE */
59 static int procfs_init __P((struct vfsconf *vfsp));
60 static int procfs_mount __P((struct mount *mp, char *path, caddr_t data,
61 struct nameidata *ndp, struct proc *p));
62 static int procfs_start __P((struct mount *mp, int flags, struct proc *p));
63 static int procfs_statfs __P((struct mount *mp, struct statfs *sbp,
65 static int procfs_unmount __P((struct mount *mp, int mntflags,
75 procfs_mount(mp, path, data, ndp, p)
79 struct nameidata *ndp;
84 if (UIO_MX & (UIO_MX-1)) {
85 log(LOG_ERR, "procfs: invalid directory entry size\n");
89 if (mp->mnt_flag & MNT_UPDATE)
92 mp->mnt_flag |= MNT_LOCAL;
96 (void) copyinstr(path, (caddr_t)mp->mnt_stat.f_mntonname, MNAMELEN, &size);
97 bzero(mp->mnt_stat.f_mntonname + size, MNAMELEN - size);
99 size = sizeof("procfs") - 1;
100 bcopy("procfs", mp->mnt_stat.f_mntfromname, size);
101 bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size);
102 (void)procfs_statfs(mp, &mp->mnt_stat, p);
107 * unmount system call
110 procfs_unmount(mp, mntflags, p)
118 if (mntflags & MNT_FORCE)
121 error = vflush(mp, 0, flags);
134 return (procfs_allocvp(mp, vpp, 0, Proot));
139 procfs_start(mp, flags, p)
149 * Get file system statistics.
152 procfs_statfs(mp, sbp, p)
157 sbp->f_bsize = PAGE_SIZE;
158 sbp->f_iosize = PAGE_SIZE;
159 sbp->f_blocks = 1; /* avoid divide by zero in some df's */
162 sbp->f_files = maxproc; /* approx */
163 sbp->f_ffree = maxproc - nprocs; /* approx */
165 if (sbp != &mp->mnt_stat) {
166 sbp->f_type = mp->mnt_vfc->vfc_typenum;
167 bcopy(&mp->mnt_stat.f_fsid, &sbp->f_fsid, sizeof(sbp->f_fsid));
168 bcopy(mp->mnt_stat.f_mntonname, sbp->f_mntonname, MNAMELEN);
169 bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN);
177 struct vfsconf *vfsp;
183 #define procfs_fhtovp ((int (*) __P((struct mount *, struct fid *, \
184 struct mbuf *, struct vnode **, int *, struct ucred **)))einval)
185 #define procfs_quotactl ((int (*) __P((struct mount *, int, uid_t, caddr_t, \
186 struct proc *)))eopnotsupp)
187 #define procfs_sync ((int (*) __P((struct mount *, int, struct ucred *, \
188 struct proc *)))nullop)
189 #define procfs_sysctl ((int (*) __P((int *, u_int, void *, size_t *, void *, \
190 size_t, struct proc *)))eopnotsupp)
191 #define procfs_vget ((int (*) __P((struct mount *, ino_t, struct vnode **))) \
193 #define procfs_vptofh ((int (*) __P((struct vnode *, struct fid *)))einval)
195 static struct vfsops procfs_vfsops = {
209 VFS_SET(procfs_vfsops, procfs, MOUNT_PROCFS, VFCF_SYNTHETIC);