diff options
Diffstat (limited to 'sys/miscfs/fdesc/fdesc_vfsops.c')
| -rw-r--r-- | sys/miscfs/fdesc/fdesc_vfsops.c | 226 |
1 files changed, 0 insertions, 226 deletions
diff --git a/sys/miscfs/fdesc/fdesc_vfsops.c b/sys/miscfs/fdesc/fdesc_vfsops.c deleted file mode 100644 index a758bb8..0000000 --- a/sys/miscfs/fdesc/fdesc_vfsops.c +++ /dev/null @@ -1,226 +0,0 @@ -/* - * Copyright (c) 1992, 1993, 1995 - * The Regents of the University of California. All rights reserved. - * - * This code is derived from software donated 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. - * - * @(#)fdesc_vfsops.c 8.4 (Berkeley) 1/21/94 - * - * $FreeBSD$ - */ - -/* - * /dev/fd Filesystem - */ - -#include <sys/param.h> -#include <sys/systm.h> -#include <sys/filedesc.h> -#include <sys/kernel.h> -#include <sys/lock.h> -#include <sys/malloc.h> -#include <sys/mount.h> -#include <sys/proc.h> -#include <sys/resourcevar.h> -#include <sys/socket.h> -#include <sys/vnode.h> - -#include <miscfs/fdesc/fdesc.h> - -static MALLOC_DEFINE(M_FDESCMNT, "FDESC mount", "FDESC mount structure"); - -static int fdesc_mount __P((struct mount *mp, char *path, caddr_t data, - struct nameidata *ndp, struct proc *p)); -static int fdesc_unmount __P((struct mount *mp, int mntflags, - struct proc *p)); -static int fdesc_statfs __P((struct mount *mp, struct statfs *sbp, - struct proc *p)); - -/* - * Mount the per-process file descriptors (/dev/fd) - */ -static int -fdesc_mount(mp, path, data, ndp, p) - struct mount *mp; - char *path; - caddr_t data; - struct nameidata *ndp; - struct proc *p; -{ - int error = 0; - struct fdescmount *fmp; - struct vnode *rvp; - - /* - * Update is a no-op - */ - if (mp->mnt_flag & MNT_UPDATE) - return (EOPNOTSUPP); - - error = fdesc_allocvp(Froot, FD_ROOT, mp, &rvp, p); - if (error) - return (error); - - MALLOC(fmp, struct fdescmount *, sizeof(struct fdescmount), - M_FDESCMNT, M_WAITOK); /* XXX */ - rvp->v_type = VDIR; - rvp->v_flag |= VROOT; - fmp->f_root = rvp; - /* XXX -- don't mark as local to work around fts() problems */ - /*mp->mnt_flag |= MNT_LOCAL;*/ - mp->mnt_data = (qaddr_t) fmp; - vfs_getnewfsid(mp); - - bzero(mp->mnt_stat.f_mntfromname, MNAMELEN); - bcopy("fdesc", mp->mnt_stat.f_mntfromname, sizeof("fdesc")); - (void)fdesc_statfs(mp, &mp->mnt_stat, p); - return (0); -} - -static int -fdesc_unmount(mp, mntflags, p) - struct mount *mp; - int mntflags; - struct proc *p; -{ - int error; - int flags = 0; - - if (mntflags & MNT_FORCE) - flags |= FORCECLOSE; - - /* - * Clear out buffer cache. I don't think we - * ever get anything cached at this level at the - * moment, but who knows... - * - * There is 1 extra root vnode reference corresponding - * to f_root. - */ - if ((error = vflush(mp, 1, flags)) != 0) - return (error); - - /* - * Finally, throw away the fdescmount structure - */ - free(mp->mnt_data, M_FDESCMNT); /* XXX */ - mp->mnt_data = 0; - - return (0); -} - -int -fdesc_root(mp, vpp) - struct mount *mp; - struct vnode **vpp; -{ - struct proc *p = curproc; /* XXX */ - struct vnode *vp; - - /* - * Return locked reference to root. - */ - vp = VFSTOFDESC(mp)->f_root; - VREF(vp); - vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p); - *vpp = vp; - return (0); -} - -static int -fdesc_statfs(mp, sbp, p) - struct mount *mp; - struct statfs *sbp; - struct proc *p; -{ - struct filedesc *fdp; - int lim; - int i; - int last; - int freefd; - - /* - * Compute number of free file descriptors. - * [ Strange results will ensue if the open file - * limit is ever reduced below the current number - * of open files... ] - */ - lim = p->p_rlimit[RLIMIT_NOFILE].rlim_cur; - fdp = p->p_fd; - last = min(fdp->fd_nfiles, lim); - freefd = 0; - for (i = fdp->fd_freefile; i < last; i++) - if (fdp->fd_ofiles[i] == NULL) - freefd++; - - /* - * Adjust for the fact that the fdesc array may not - * have been fully allocated yet. - */ - if (fdp->fd_nfiles < lim) - freefd += (lim - fdp->fd_nfiles); - - sbp->f_flags = 0; - sbp->f_bsize = DEV_BSIZE; - sbp->f_iosize = DEV_BSIZE; - sbp->f_blocks = 2; /* 1K to keep df happy */ - sbp->f_bfree = 0; - sbp->f_bavail = 0; - sbp->f_files = lim + 1; /* Allow for "." */ - sbp->f_ffree = freefd; /* See comments above */ - 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 fdesc_vfsops = { - fdesc_mount, - vfs_stdstart, - fdesc_unmount, - fdesc_root, - vfs_stdquotactl, - fdesc_statfs, - vfs_stdsync, - vfs_stdvget, - vfs_stdfhtovp, - vfs_stdcheckexp, - vfs_stdvptofh, - fdesc_init, - vfs_stduninit, - vfs_stdextattrctl, -}; - -VFS_SET(fdesc_vfsops, fdesc, VFCF_SYNTHETIC); |
