diff options
Diffstat (limited to 'sys/fs/procfs/procfs_vfsops.c')
| -rw-r--r-- | sys/fs/procfs/procfs_vfsops.c | 215 |
1 files changed, 215 insertions, 0 deletions
diff --git a/sys/fs/procfs/procfs_vfsops.c b/sys/fs/procfs/procfs_vfsops.c new file mode 100644 index 0000000..ac1ab53 --- /dev/null +++ b/sys/fs/procfs/procfs_vfsops.c @@ -0,0 +1,215 @@ +/* + * Copyright (c) 1993 Jan-Simon Pendry + * Copyright (c) 1993 + * The Regents of the University of California. All rights reserved. + * + * This code is derived from software contributed 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. + * + * @(#)procfs_vfsops.c 8.7 (Berkeley) 5/10/95 + * + * $Id: procfs_vfsops.c,v 1.25 1998/07/27 22:47:17 alex Exp $ + */ + +/* + * procfs VFS interface + */ + +#include <sys/param.h> +#include <sys/systm.h> +#include <sys/kernel.h> +#include <sys/proc.h> +#include <sys/syslog.h> +#include <sys/mount.h> +#include <sys/vnode.h> +#include <miscfs/procfs/procfs.h> + +static int procfs_init __P((struct vfsconf *vfsp)); +static int procfs_mount __P((struct mount *mp, char *path, caddr_t data, + struct nameidata *ndp, struct proc *p)); +static int procfs_start __P((struct mount *mp, int flags, struct proc *p)); +static int procfs_statfs __P((struct mount *mp, struct statfs *sbp, + struct proc *p)); +static int procfs_unmount __P((struct mount *mp, int mntflags, + struct proc *p)); + +/* + * VFS Operations. + * + * mount system call + */ +/* ARGSUSED */ +static int +procfs_mount(mp, path, data, ndp, p) + struct mount *mp; + char *path; + caddr_t data; + struct nameidata *ndp; + struct proc *p; +{ + size_t size; + int error; + + if (UIO_MX & (UIO_MX-1)) { + log(LOG_ERR, "procfs: invalid directory entry size\n"); + return (EINVAL); + } + + if (mp->mnt_flag & MNT_UPDATE) + return (EOPNOTSUPP); + + if (mp->mnt_vfc->vfc_refcount == 1 && (error = at_exit(procfs_exit))) { + printf("procfs: cannot register procfs_exit with at_exit\n"); + return(error); + } + + mp->mnt_flag |= MNT_LOCAL; + mp->mnt_data = 0; + vfs_getnewfsid(mp); + + (void) copyinstr(path, (caddr_t)mp->mnt_stat.f_mntonname, MNAMELEN, &size); + bzero(mp->mnt_stat.f_mntonname + size, MNAMELEN - size); + + size = sizeof("procfs") - 1; + bcopy("procfs", mp->mnt_stat.f_mntfromname, size); + bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size); + (void)procfs_statfs(mp, &mp->mnt_stat, p); + + return (0); +} + +/* + * unmount system call + */ +static int +procfs_unmount(mp, mntflags, p) + struct mount *mp; + int mntflags; + struct proc *p; +{ + int error; + int flags = 0; + + if (mntflags & MNT_FORCE) + flags |= FORCECLOSE; + + error = vflush(mp, 0, flags); + if (error) + return (error); + + if (mp->mnt_vfc->vfc_refcount == 1) + rm_at_exit(procfs_exit); + + return (0); +} + +int +procfs_root(mp, vpp) + struct mount *mp; + struct vnode **vpp; +{ + + return (procfs_allocvp(mp, vpp, 0, Proot)); +} + +/* ARGSUSED */ +static int +procfs_start(mp, flags, p) + struct mount *mp; + int flags; + struct proc *p; +{ + + return (0); +} + +/* + * Get file system statistics. + */ +static int +procfs_statfs(mp, sbp, p) + struct mount *mp; + struct statfs *sbp; + struct proc *p; +{ + sbp->f_bsize = PAGE_SIZE; + sbp->f_iosize = PAGE_SIZE; + sbp->f_blocks = 1; /* avoid divide by zero in some df's */ + sbp->f_bfree = 0; + sbp->f_bavail = 0; + sbp->f_files = maxproc; /* approx */ + sbp->f_ffree = maxproc - nprocs; /* approx */ + + if (sbp != &mp->mnt_stat) { + sbp->f_type = mp->mnt_vfc->vfc_typenum; + bcopy(&mp->mnt_stat.f_fsid, &sbp->f_fsid, sizeof(sbp->f_fsid)); + bcopy(mp->mnt_stat.f_mntonname, sbp->f_mntonname, MNAMELEN); + bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN); + } + + return (0); +} + +static int +procfs_init(vfsp) + struct vfsconf *vfsp; +{ + + return (0); +} + +#define procfs_fhtovp ((int (*) __P((struct mount *, struct fid *, \ + struct sockaddr *, struct vnode **, int *, struct ucred **)))einval) +#define procfs_quotactl ((int (*) __P((struct mount *, int, uid_t, caddr_t, \ + struct proc *)))eopnotsupp) +#define procfs_sync ((int (*) __P((struct mount *, int, struct ucred *, \ + struct proc *)))nullop) +#define procfs_sysctl ((int (*) __P((int *, u_int, void *, size_t *, void *, \ + size_t, struct proc *)))eopnotsupp) +#define procfs_vget ((int (*) __P((struct mount *, ino_t, struct vnode **))) \ + eopnotsupp) +#define procfs_vptofh ((int (*) __P((struct vnode *, struct fid *)))einval) + +static struct vfsops procfs_vfsops = { + procfs_mount, + procfs_start, + procfs_unmount, + procfs_root, + procfs_quotactl, + procfs_statfs, + procfs_sync, + procfs_vget, + procfs_fhtovp, + procfs_vptofh, + procfs_init, +}; + +VFS_SET(procfs_vfsops, procfs, VFCF_SYNTHETIC); |
