diff options
Diffstat (limited to 'sys/miscfs/linprocfs/linprocfs_vfsops.c')
| -rw-r--r-- | sys/miscfs/linprocfs/linprocfs_vfsops.c | 178 |
1 files changed, 178 insertions, 0 deletions
diff --git a/sys/miscfs/linprocfs/linprocfs_vfsops.c b/sys/miscfs/linprocfs/linprocfs_vfsops.c new file mode 100644 index 0000000..1132194 --- /dev/null +++ b/sys/miscfs/linprocfs/linprocfs_vfsops.c @@ -0,0 +1,178 @@ +/* + * 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 + * + * $FreeBSD$ + */ + +/* + * 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/linprocfs/linprocfs.h> + +static int linprocfs_mount __P((struct mount *mp, char *path, caddr_t data, + struct nameidata *ndp, struct proc *p)); +static int linprocfs_statfs __P((struct mount *mp, struct statfs *sbp, + struct proc *p)); +static int linprocfs_unmount __P((struct mount *mp, int mntflags, + struct proc *p)); + +/* + * VFS Operations. + * + * mount system call + */ +/* ARGSUSED */ +static int +linprocfs_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 (mp->mnt_flag & MNT_UPDATE) + return (EOPNOTSUPP); + + if (mp->mnt_vfc->vfc_refcount == 1 && (error = at_exit(linprocfs_exit))) { + printf("linprocfs: cannot register linprocfs_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("linprocfs") - 1; + bcopy("linprocfs", mp->mnt_stat.f_mntfromname, size); + bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size); + (void)linprocfs_statfs(mp, &mp->mnt_stat, p); + + return (0); +} + +/* + * unmount system call + */ +static int +linprocfs_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(linprocfs_exit); + + return (0); +} + +int +linprocfs_root(mp, vpp) + struct mount *mp; + struct vnode **vpp; +{ + + return (linprocfs_allocvp(mp, vpp, 0, Proot)); +} + +/* + * Get file system statistics. + */ +static int +linprocfs_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 struct vfsops linprocfs_vfsops = { + linprocfs_mount, + vfs_stdstart, + linprocfs_unmount, + linprocfs_root, + vfs_stdquotactl, + linprocfs_statfs, + vfs_stdsync, + vfs_stdvget, + vfs_stdfhtovp, + vfs_stdcheckexp, + vfs_stdvptofh, + vfs_stdinit, +}; + +VFS_SET(linprocfs_vfsops, linprocfs, VFCF_SYNTHETIC); |
