/* * 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 8.4 (Berkeley) 1/21/94 * * $FreeBSD$ */ /* * procfs VFS interface */ #include #include #include #include #include #include #include #include #include #include #include #include /* for PAGE_SIZE */ static int procfs_fhtovp __P((struct mount *mp, struct fid *fhp, struct mbuf *nam, struct vnode **vpp, int *exflagsp, struct ucred **credanonp)); static int procfs_init __P((void)); static int procfs_mount __P((struct mount *mp, char *path, caddr_t data, struct nameidata *ndp, struct proc *p)); static int procfs_quotactl __P((struct mount *mp, int cmds, uid_t uid, caddr_t arg, 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_sync __P((struct mount *mp, int waitfor, struct ucred *cred, struct proc *p)); static int procfs_unmount __P((struct mount *mp, int mntflags, struct proc *p)); static int procfs_vget __P((struct mount *mp, ino_t ino, struct vnode **vpp)); static int procfs_vptofh __P((struct vnode *vp, struct fid *fhp)); /* * 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; { u_int size; 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); mp->mnt_flag |= MNT_LOCAL; mp->mnt_data = 0; getnewfsid(mp, MOUNT_PROCFS); (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) { /* procfs can never be rootfs so don't check for it */ if (!doforce) return (EINVAL); flags |= FORCECLOSE; } error = vflush(mp, 0, flags); if (error) return (error); return (0); } int procfs_root(mp, vpp) struct mount *mp; struct vnode **vpp; { struct pfsnode *pfs; struct vnode *vp; int error; error = procfs_allocvp(mp, &vp, (pid_t) 0, Proot); if (error) return (error); vp->v_type = VDIR; vp->v_flag = VROOT; pfs = VTOPFS(vp); *vpp = vp; return (0); } /* */ /* 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_type = MOUNT_PROCFS; 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) { 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_quotactl(mp, cmds, uid, arg, p) struct mount *mp; int cmds; uid_t uid; caddr_t arg; struct proc *p; { return (EOPNOTSUPP); } static int procfs_sync(mp, waitfor, cred, p) struct mount *mp; int waitfor; struct ucred *cred; struct proc *p; { return (0); } static int procfs_vget(mp, ino, vpp) struct mount *mp; ino_t ino; struct vnode **vpp; { return (EOPNOTSUPP); } static int procfs_fhtovp(mp, fhp, nam, vpp, exflagsp, credanonp) struct mount *mp; struct fid *fhp; struct mbuf *nam; struct vnode **vpp; int *exflagsp; struct ucred **credanonp; { return (EINVAL); } static int procfs_vptofh(vp, fhp) struct vnode *vp; struct fid *fhp; { return EINVAL; } static int procfs_init() { return (0); } 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, MOUNT_PROCFS, VFCF_SYNTHETIC);