-/*
- * Copyright (c) 2000-2007 Apple Inc. All rights reserved.
- *
- * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
- *
- * This file contains Original Code and/or Modifications of Original Code
- * as defined in and that are subject to the Apple Public Source License
- * Version 2.0 (the 'License'). You may not use this file except in
- * compliance with the License. The rights granted to you under the License
- * may not be used to create, or enable the creation or redistribution of,
- * unlawful or unlicensed copies of an Apple operating system, or to
- * circumvent, violate, or enable the circumvention or violation of, any
- * terms of an Apple operating system software license agreement.
- *
- * Please obtain a copy of the License at
- * http://www.opensource.apple.com/apsl/ and read it before using this file.
- *
- * The Original Code and all software distributed under the License are
- * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
- * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
- * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
- * Please see the License for the specific language governing rights and
- * limitations under the License.
- *
- * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
- */
-/* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
-/*
- * 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 8.10 (Berkeley) 5/14/95
- *
- */
-/*
-* /dev/fd Filesystem
- */
-
-#include <sys/param.h>
-#include <sys/systm.h>
-#include <sys/time.h>
-#include <sys/types.h>
-#include <sys/proc_internal.h>
-#include <sys/resourcevar.h>
-#include <sys/filedesc.h>
-#include <sys/vnode.h>
-#include <sys/mount_internal.h>
-#include <sys/namei.h>
-#include <sys/malloc.h>
-#include <miscfs/fdesc/fdesc.h>
-
-/*
- * Mount the per-process file descriptors (/dev/fd)
- */
-static int
-fdesc_mount(struct mount *mp, __unused vnode_t devvp, __unused user_addr_t data, __unused vfs_context_t context)
-{
- int error = 0;
- struct fdescmount *fmp;
- struct vnode *rvp;
-
- /*
- * Update is a no-op
- */
- if (mp->mnt_flag & MNT_UPDATE)
- return (ENOTSUP);
-
- error = fdesc_allocvp(Froot, FD_ROOT, mp, &rvp, VDIR);
- if (error)
- return (error);
-
- MALLOC(fmp, struct fdescmount *, sizeof(struct fdescmount),
- M_UFSMNT, M_WAITOK); /* XXX */
-
- vnode_setnoflush(rvp);
- vnode_ref(rvp);
- vnode_put(rvp);
-
- 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_vfsstat.f_mntfromname, MAXPATHLEN);
- bcopy("fdesc", mp->mnt_vfsstat.f_mntfromname, sizeof("fdesc"));
- return (0);
-}
-
-static int
-fdesc_start(__unused struct mount *mp, __unused int flags, __unused vfs_context_t context)
-{
- return (0);
-}
-
-static int
-fdesc_unmount(struct mount *mp, int mntflags, __unused vfs_context_t context)
-{
- int error;
- int flags = 0;
- int force = 0;
- struct vnode *rvp = VFSTOFDESC(mp)->f_root;
-
- if (mntflags & MNT_FORCE) {
- flags |= FORCECLOSE;
- force = 1;
- }
-
- if ( vnode_isinuse(rvp, 1) && !force )
- return (EBUSY);
- if ( (error = vflush(mp, rvp, flags|SKIPSYSTEM)) && !force )
- return (error);
-
- /*
- * And mark for recycle after we drop its reference; it away for future re-use
- */
- vnode_recycle(rvp);
- /*
- * Release reference on underlying root vnode
- */
- vnode_rele(rvp);
- /*
- * Finally, throw away the fdescmount structure
- */
- _FREE(mp->mnt_data, M_UFSMNT); /* XXX */
- mp->mnt_data = NULL;
-
- return (0);
-}
-
-int
-fdesc_root(struct mount *mp, struct vnode **vpp, __unused vfs_context_t context)
-{
- struct vnode *vp;
-
- /*
- * Return locked reference to root.
- */
- vp = VFSTOFDESC(mp)->f_root;
- vnode_get(vp);
- *vpp = vp;
- return (0);
-}
-
-#if 0
-/*
- * XXX commented out in mount.h
- */
-int
-fdesc_statfs(__unused struct mount *mp, struct vfsstatfs *sbp, vfs_context_t context)
-{
- proc_t p = vfs_context_proc(context);
- 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 &&
- !(fdp->fd_ofileflags[i] & UF_RESERVED))
- 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 = (uint64_t)2; /* 1K to keep df happy */
- sbp->f_bfree = 0;
- sbp->f_bavail = 0;
- sbp->f_files = (uint64_t)((unsigned long)(lim + 1)); /* Allow for "." */
- sbp->f_ffree = (uint64_t)((unsigned long)freefd); /* See comments above */
-
- return (0);
-}
-#endif /* 0 */
-
-static int
-fdesc_vfs_getattr(__unused mount_t mp, struct vfs_attr *fsap, vfs_context_t context)
-{
- VFSATTR_RETURN(fsap, f_bsize, DEV_BSIZE);
- VFSATTR_RETURN(fsap, f_iosize, DEV_BSIZE);
- VFSATTR_RETURN(fsap, f_blocks, 2);
- VFSATTR_RETURN(fsap, f_bfree, 0);
- VFSATTR_RETURN(fsap, f_bavail, 0);
- VFSATTR_RETURN(fsap, f_fssubtype, 0);
-
- if (VFSATTR_IS_ACTIVE(fsap, f_objcount) ||
- VFSATTR_IS_ACTIVE(fsap, f_maxobjcount) ||
- VFSATTR_IS_ACTIVE(fsap, f_files) ||
- VFSATTR_IS_ACTIVE(fsap, f_ffree))
- {
- proc_t p = vfs_context_proc(context);
- 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 &&
- !(fdp->fd_ofileflags[i] & UF_RESERVED))
- 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);
-
- VFSATTR_RETURN(fsap, f_objcount, lim+1);
- VFSATTR_RETURN(fsap, f_maxobjcount, lim+1);
- VFSATTR_RETURN(fsap, f_files, lim+1);
- VFSATTR_RETURN(fsap, f_ffree, freefd);
- }
-
- return 0;
-}
-
-static int
-fdesc_sync(__unused struct mount *mp, __unused int waitfor, __unused vfs_context_t context)
-{
-
- return (0);
-}
-
-#define fdesc_fhtovp (int (*) (mount_t, int, unsigned char *, vnode_t *, vfs_context_t))eopnotsupp
-#define fdesc_sysctl (int (*) (int *, u_int, user_addr_t, size_t *, user_addr_t, size_t, vfs_context_t))eopnotsupp
-#define fdesc_vget (int (*) (mount_t, ino64_t, vnode_t *, vfs_context_t))eopnotsupp
-#define fdesc_vptofh (int (*) (vnode_t, int *, unsigned char *, vfs_context_t))eopnotsupp
-
-struct vfsops fdesc_vfsops = {
- fdesc_mount,
- fdesc_start,
- fdesc_unmount,
- fdesc_root,
- NULL, /* quotactl */
- fdesc_vfs_getattr,
-/* fdesc_statfs, XXX commented out in mount.h */
- fdesc_sync,
- fdesc_vget,
- fdesc_fhtovp,
- fdesc_vptofh,
- fdesc_init,
- fdesc_sysctl,
- NULL,
- {NULL}
-};
projects / apple / xnu.git / blobdiff