1017 lines
22 KiB
C
1017 lines
22 KiB
C
/* $NetBSD: fdesc_vnops.c,v 1.44 1998/03/01 02:21:08 fvdl Exp $ */
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/*
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* Copyright (c) 1992, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software donated to Berkeley by
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* Jan-Simon Pendry.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)fdesc_vnops.c 8.17 (Berkeley) 5/22/95
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*
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* #Id: fdesc_vnops.c,v 1.12 1993/04/06 16:17:17 jsp Exp #
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*/
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/*
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* /dev/fd Filesystem
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/types.h>
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#include <sys/time.h>
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#include <sys/proc.h>
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#include <sys/kernel.h> /* boottime */
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#include <sys/resourcevar.h>
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#include <sys/socketvar.h>
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#include <sys/filedesc.h>
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#include <sys/vnode.h>
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#include <sys/malloc.h>
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#include <sys/conf.h>
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#include <sys/file.h>
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#include <sys/stat.h>
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#include <sys/mount.h>
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#include <sys/namei.h>
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#include <sys/buf.h>
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#include <sys/dirent.h>
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#include <sys/tty.h>
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#include <miscfs/fdesc/fdesc.h>
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#include <miscfs/genfs/genfs.h>
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#define cttyvp(p) ((p)->p_flag & P_CONTROLT ? (p)->p_session->s_ttyvp : NULL)
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#define FDL_WANT 0x01
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#define FDL_LOCKED 0x02
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static int fdcache_lock;
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dev_t devctty;
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#if (FD_STDIN != FD_STDOUT-1) || (FD_STDOUT != FD_STDERR-1)
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FD_STDIN, FD_STDOUT, FD_STDERR must be a sequence n, n+1, n+2
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#endif
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#define NFDCACHE 4
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#define FD_NHASH(ix) \
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(&fdhashtbl[(ix) & fdhash])
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LIST_HEAD(fdhashhead, fdescnode) *fdhashtbl;
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u_long fdhash;
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int fdesc_lookup __P((void *));
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#define fdesc_create genfs_eopnotsupp
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#define fdesc_mknod genfs_eopnotsupp
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int fdesc_open __P((void *));
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#define fdesc_close genfs_nullop
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#define fdesc_access genfs_nullop
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int fdesc_getattr __P((void *));
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int fdesc_setattr __P((void *));
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int fdesc_read __P((void *));
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int fdesc_write __P((void *));
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int fdesc_ioctl __P((void *));
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int fdesc_poll __P((void *));
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#define fdesc_mmap genfs_eopnotsupp
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#define fdesc_fsync genfs_nullop
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#define fdesc_seek genfs_seek
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#define fdesc_remove genfs_eopnotsupp
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int fdesc_link __P((void *));
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#define fdesc_rename genfs_eopnotsupp
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#define fdesc_mkdir genfs_eopnotsupp
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#define fdesc_rmdir genfs_eopnotsupp
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int fdesc_symlink __P((void *));
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int fdesc_readdir __P((void *));
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int fdesc_readlink __P((void *));
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#define fdesc_abortop genfs_abortop
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int fdesc_inactive __P((void *));
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int fdesc_reclaim __P((void *));
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#define fdesc_lock genfs_nolock
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#define fdesc_unlock genfs_nounlock
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#define fdesc_bmap genfs_badop
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#define fdesc_strategy genfs_badop
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int fdesc_print __P((void *));
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int fdesc_pathconf __P((void *));
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#define fdesc_islocked genfs_noislocked
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#define fdesc_advlock genfs_eopnotsupp
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#define fdesc_blkatoff genfs_eopnotsupp
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#define fdesc_valloc genfs_eopnotsupp
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#define fdesc_vfree genfs_nullop
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#define fdesc_truncate genfs_eopnotsupp
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#define fdesc_update genfs_nullop
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#define fdesc_bwrite genfs_eopnotsupp
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#define fdesc_revoke genfs_revoke
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static int fdesc_attr __P((int, struct vattr *, struct ucred *, struct proc *));
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int (**fdesc_vnodeop_p) __P((void *));
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struct vnodeopv_entry_desc fdesc_vnodeop_entries[] = {
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{ &vop_default_desc, vn_default_error },
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{ &vop_lookup_desc, fdesc_lookup }, /* lookup */
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{ &vop_create_desc, fdesc_create }, /* create */
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{ &vop_mknod_desc, fdesc_mknod }, /* mknod */
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{ &vop_open_desc, fdesc_open }, /* open */
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{ &vop_close_desc, fdesc_close }, /* close */
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{ &vop_access_desc, fdesc_access }, /* access */
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{ &vop_getattr_desc, fdesc_getattr }, /* getattr */
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{ &vop_setattr_desc, fdesc_setattr }, /* setattr */
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{ &vop_read_desc, fdesc_read }, /* read */
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{ &vop_write_desc, fdesc_write }, /* write */
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{ &vop_ioctl_desc, fdesc_ioctl }, /* ioctl */
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{ &vop_poll_desc, fdesc_poll }, /* poll */
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{ &vop_revoke_desc, fdesc_revoke }, /* revoke */
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{ &vop_mmap_desc, fdesc_mmap }, /* mmap */
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{ &vop_fsync_desc, fdesc_fsync }, /* fsync */
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{ &vop_seek_desc, fdesc_seek }, /* seek */
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{ &vop_remove_desc, fdesc_remove }, /* remove */
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{ &vop_link_desc, fdesc_link }, /* link */
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{ &vop_rename_desc, fdesc_rename }, /* rename */
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{ &vop_mkdir_desc, fdesc_mkdir }, /* mkdir */
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{ &vop_rmdir_desc, fdesc_rmdir }, /* rmdir */
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{ &vop_symlink_desc, fdesc_symlink }, /* symlink */
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{ &vop_readdir_desc, fdesc_readdir }, /* readdir */
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{ &vop_readlink_desc, fdesc_readlink }, /* readlink */
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{ &vop_abortop_desc, fdesc_abortop }, /* abortop */
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{ &vop_inactive_desc, fdesc_inactive }, /* inactive */
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{ &vop_reclaim_desc, fdesc_reclaim }, /* reclaim */
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{ &vop_lock_desc, fdesc_lock }, /* lock */
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{ &vop_unlock_desc, fdesc_unlock }, /* unlock */
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{ &vop_bmap_desc, fdesc_bmap }, /* bmap */
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{ &vop_strategy_desc, fdesc_strategy }, /* strategy */
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{ &vop_print_desc, fdesc_print }, /* print */
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{ &vop_islocked_desc, fdesc_islocked }, /* islocked */
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{ &vop_pathconf_desc, fdesc_pathconf }, /* pathconf */
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{ &vop_advlock_desc, fdesc_advlock }, /* advlock */
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{ &vop_blkatoff_desc, fdesc_blkatoff }, /* blkatoff */
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{ &vop_valloc_desc, fdesc_valloc }, /* valloc */
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{ &vop_vfree_desc, fdesc_vfree }, /* vfree */
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{ &vop_truncate_desc, fdesc_truncate }, /* truncate */
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{ &vop_update_desc, fdesc_update }, /* update */
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{ &vop_bwrite_desc, fdesc_bwrite }, /* bwrite */
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{ (struct vnodeop_desc*)NULL, (int(*) __P((void *)))NULL }
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};
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struct vnodeopv_desc fdesc_vnodeop_opv_desc =
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{ &fdesc_vnodeop_p, fdesc_vnodeop_entries };
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/*
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* Initialise cache headers
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*/
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void
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fdesc_init()
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{
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int cttymajor;
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/* locate the major number */
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for (cttymajor = 0; cttymajor < nchrdev; cttymajor++)
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if (cdevsw[cttymajor].d_open == cttyopen)
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break;
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devctty = makedev(cttymajor, 0);
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fdhashtbl = hashinit(NFDCACHE, M_CACHE, M_NOWAIT, &fdhash);
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}
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int
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fdesc_allocvp(ftype, ix, mp, vpp)
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fdntype ftype;
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int ix;
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struct mount *mp;
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struct vnode **vpp;
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{
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struct fdhashhead *fc;
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struct fdescnode *fd;
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int error = 0;
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fc = FD_NHASH(ix);
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loop:
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for (fd = fc->lh_first; fd != 0; fd = fd->fd_hash.le_next) {
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if (fd->fd_ix == ix && fd->fd_vnode->v_mount == mp) {
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if (vget(fd->fd_vnode, 0))
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goto loop;
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*vpp = fd->fd_vnode;
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return (error);
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}
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}
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/*
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* otherwise lock the array while we call getnewvnode
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* since that can block.
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*/
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if (fdcache_lock & FDL_LOCKED) {
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fdcache_lock |= FDL_WANT;
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sleep((caddr_t) &fdcache_lock, PINOD);
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goto loop;
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}
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fdcache_lock |= FDL_LOCKED;
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error = getnewvnode(VT_FDESC, mp, fdesc_vnodeop_p, vpp);
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if (error)
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goto out;
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MALLOC(fd, void *, sizeof(struct fdescnode), M_TEMP, M_WAITOK);
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(*vpp)->v_data = fd;
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fd->fd_vnode = *vpp;
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fd->fd_type = ftype;
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fd->fd_fd = -1;
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fd->fd_link = 0;
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fd->fd_ix = ix;
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LIST_INSERT_HEAD(fc, fd, fd_hash);
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out:;
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fdcache_lock &= ~FDL_LOCKED;
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if (fdcache_lock & FDL_WANT) {
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fdcache_lock &= ~FDL_WANT;
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wakeup((caddr_t) &fdcache_lock);
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}
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return (error);
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}
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/*
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* vp is the current namei directory
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* ndp is the name to locate in that directory...
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*/
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int
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fdesc_lookup(v)
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void *v;
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{
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struct vop_lookup_args /* {
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struct vnode * a_dvp;
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struct vnode ** a_vpp;
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struct componentname * a_cnp;
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} */ *ap = v;
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struct vnode **vpp = ap->a_vpp;
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struct vnode *dvp = ap->a_dvp;
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struct componentname *cnp = ap->a_cnp;
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struct proc *p = cnp->cn_proc;
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const char *pname = cnp->cn_nameptr;
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int nfiles = p->p_fd->fd_nfiles;
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unsigned fd = 0;
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int error;
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struct vnode *fvp;
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char *ln;
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if (cnp->cn_namelen == 1 && *pname == '.') {
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*vpp = dvp;
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VREF(dvp);
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vn_lock(dvp, LK_SHARED | LK_RETRY);
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return (0);
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}
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switch (VTOFDESC(dvp)->fd_type) {
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default:
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case Flink:
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case Fdesc:
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case Fctty:
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error = ENOTDIR;
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goto bad;
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case Froot:
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if (cnp->cn_namelen == 2 && bcmp(pname, "fd", 2) == 0) {
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error = fdesc_allocvp(Fdevfd, FD_DEVFD, dvp->v_mount, &fvp);
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if (error)
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goto bad;
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*vpp = fvp;
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fvp->v_type = VDIR;
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vn_lock(dvp, LK_SHARED | LK_RETRY);
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return (0);
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}
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if (cnp->cn_namelen == 3 && bcmp(pname, "tty", 3) == 0) {
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struct vnode *ttyvp = cttyvp(p);
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if (ttyvp == NULL) {
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error = ENXIO;
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goto bad;
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}
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error = fdesc_allocvp(Fctty, FD_CTTY, dvp->v_mount, &fvp);
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if (error)
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goto bad;
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*vpp = fvp;
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fvp->v_type = VCHR;
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vn_lock(dvp, LK_SHARED | LK_RETRY);
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return (0);
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}
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ln = 0;
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switch (cnp->cn_namelen) {
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case 5:
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if (bcmp(pname, "stdin", 5) == 0) {
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ln = "fd/0";
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fd = FD_STDIN;
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}
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break;
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case 6:
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if (bcmp(pname, "stdout", 6) == 0) {
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ln = "fd/1";
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fd = FD_STDOUT;
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} else
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if (bcmp(pname, "stderr", 6) == 0) {
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ln = "fd/2";
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fd = FD_STDERR;
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}
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break;
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}
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if (ln) {
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error = fdesc_allocvp(Flink, fd, dvp->v_mount, &fvp);
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if (error)
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goto bad;
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VTOFDESC(fvp)->fd_link = ln;
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*vpp = fvp;
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fvp->v_type = VLNK;
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vn_lock(fvp, LK_SHARED | LK_RETRY);
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return (0);
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} else {
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error = ENOENT;
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goto bad;
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}
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/* FALL THROUGH */
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case Fdevfd:
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if (cnp->cn_namelen == 2 && bcmp(pname, "..", 2) == 0) {
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error = fdesc_root(dvp->v_mount, vpp);
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if (error)
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goto bad;
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return (0);
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}
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fd = 0;
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while (*pname >= '0' && *pname <= '9') {
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fd = 10 * fd + *pname++ - '0';
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if (fd >= nfiles)
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break;
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}
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if (*pname != '\0') {
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error = ENOENT;
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goto bad;
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}
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if (fd >= nfiles || p->p_fd->fd_ofiles[fd] == NULL) {
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error = EBADF;
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goto bad;
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}
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error = fdesc_allocvp(Fdesc, FD_DESC+fd, dvp->v_mount, &fvp);
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if (error)
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goto bad;
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VTOFDESC(fvp)->fd_fd = fd;
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vn_lock(dvp, LK_SHARED | LK_RETRY);
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*vpp = fvp;
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return (0);
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}
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bad:;
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vn_lock(dvp, LK_SHARED | LK_RETRY);
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*vpp = NULL;
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return (error);
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}
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int
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fdesc_open(v)
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void *v;
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{
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struct vop_open_args /* {
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struct vnode *a_vp;
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int a_mode;
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struct ucred *a_cred;
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struct proc *a_p;
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} */ *ap = v;
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struct vnode *vp = ap->a_vp;
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switch (VTOFDESC(vp)->fd_type) {
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case Fdesc:
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/*
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* XXX Kludge: set p->p_dupfd to contain the value of the
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* the file descriptor being sought for duplication. The error
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* return ensures that the vnode for this device will be
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* released by vn_open. Open will detect this special error and
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* take the actions in dupfdopen. Other callers of vn_open or
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* VOP_OPEN will simply report the error.
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*/
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ap->a_p->p_dupfd = VTOFDESC(vp)->fd_fd; /* XXX */
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return (ENODEV);
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|
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case Fctty:
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return (cttyopen(devctty, ap->a_mode, 0, ap->a_p));
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case Froot:
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case Fdevfd:
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case Flink:
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break;
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}
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|
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return (0);
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}
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|
|
static int
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fdesc_attr(fd, vap, cred, p)
|
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int fd;
|
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struct vattr *vap;
|
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struct ucred *cred;
|
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struct proc *p;
|
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{
|
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struct filedesc *fdp = p->p_fd;
|
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struct file *fp;
|
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struct stat stb;
|
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int error;
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|
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if (fd >= fdp->fd_nfiles || (fp = fdp->fd_ofiles[fd]) == NULL)
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return (EBADF);
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|
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switch (fp->f_type) {
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case DTYPE_VNODE:
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error = VOP_GETATTR((struct vnode *) fp->f_data, vap, cred, p);
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|
if (error == 0 && vap->va_type == VDIR) {
|
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/*
|
|
* directories can cause loops in the namespace,
|
|
* so turn off the 'x' bits to avoid trouble.
|
|
*/
|
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vap->va_mode &= ~(S_IXUSR|S_IXGRP|S_IXOTH);
|
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}
|
|
break;
|
|
|
|
case DTYPE_SOCKET:
|
|
error = soo_stat((struct socket *)fp->f_data, &stb);
|
|
if (error == 0) {
|
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vattr_null(vap);
|
|
vap->va_type = VSOCK;
|
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vap->va_mode = stb.st_mode;
|
|
vap->va_nlink = stb.st_nlink;
|
|
vap->va_uid = stb.st_uid;
|
|
vap->va_gid = stb.st_gid;
|
|
vap->va_fsid = stb.st_dev;
|
|
vap->va_fileid = stb.st_ino;
|
|
vap->va_size = stb.st_size;
|
|
vap->va_blocksize = stb.st_blksize;
|
|
vap->va_atime = stb.st_atimespec;
|
|
vap->va_mtime = stb.st_mtimespec;
|
|
vap->va_ctime = stb.st_ctimespec;
|
|
vap->va_gen = stb.st_gen;
|
|
vap->va_flags = stb.st_flags;
|
|
vap->va_rdev = stb.st_rdev;
|
|
vap->va_bytes = stb.st_blocks * stb.st_blksize;
|
|
}
|
|
break;
|
|
|
|
default:
|
|
panic("fdesc attr");
|
|
break;
|
|
}
|
|
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
fdesc_getattr(v)
|
|
void *v;
|
|
{
|
|
struct vop_getattr_args /* {
|
|
struct vnode *a_vp;
|
|
struct vattr *a_vap;
|
|
struct ucred *a_cred;
|
|
struct proc *a_p;
|
|
} */ *ap = v;
|
|
struct vnode *vp = ap->a_vp;
|
|
struct vattr *vap = ap->a_vap;
|
|
unsigned fd;
|
|
int error = 0;
|
|
|
|
switch (VTOFDESC(vp)->fd_type) {
|
|
case Froot:
|
|
case Fdevfd:
|
|
case Flink:
|
|
case Fctty:
|
|
VATTR_NULL(vap);
|
|
vap->va_fileid = VTOFDESC(vp)->fd_ix;
|
|
|
|
#define R_ALL (S_IRUSR|S_IRGRP|S_IROTH)
|
|
#define W_ALL (S_IWUSR|S_IWGRP|S_IWOTH)
|
|
#define X_ALL (S_IXUSR|S_IXGRP|S_IXOTH)
|
|
|
|
switch (VTOFDESC(vp)->fd_type) {
|
|
case Flink:
|
|
vap->va_mode = R_ALL|X_ALL;
|
|
vap->va_type = VLNK;
|
|
vap->va_rdev = 0;
|
|
vap->va_nlink = 1;
|
|
vap->va_size = strlen(VTOFDESC(vp)->fd_link);
|
|
break;
|
|
|
|
case Fctty:
|
|
vap->va_mode = R_ALL|W_ALL;
|
|
vap->va_type = VCHR;
|
|
vap->va_rdev = devctty;
|
|
vap->va_nlink = 1;
|
|
vap->va_size = 0;
|
|
break;
|
|
|
|
default:
|
|
vap->va_mode = R_ALL|X_ALL;
|
|
vap->va_type = VDIR;
|
|
vap->va_rdev = 0;
|
|
vap->va_nlink = 2;
|
|
vap->va_size = DEV_BSIZE;
|
|
break;
|
|
}
|
|
vap->va_uid = 0;
|
|
vap->va_gid = 0;
|
|
vap->va_fsid = vp->v_mount->mnt_stat.f_fsid.val[0];
|
|
vap->va_blocksize = DEV_BSIZE;
|
|
vap->va_atime.tv_sec = boottime.tv_sec;
|
|
vap->va_atime.tv_nsec = 0;
|
|
vap->va_mtime = vap->va_atime;
|
|
vap->va_ctime = vap->va_mtime;
|
|
vap->va_gen = 0;
|
|
vap->va_flags = 0;
|
|
vap->va_bytes = 0;
|
|
break;
|
|
|
|
case Fdesc:
|
|
fd = VTOFDESC(vp)->fd_fd;
|
|
error = fdesc_attr(fd, vap, ap->a_cred, ap->a_p);
|
|
break;
|
|
|
|
default:
|
|
panic("fdesc_getattr");
|
|
break;
|
|
}
|
|
|
|
if (error == 0)
|
|
vp->v_type = vap->va_type;
|
|
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
fdesc_setattr(v)
|
|
void *v;
|
|
{
|
|
struct vop_setattr_args /* {
|
|
struct vnode *a_vp;
|
|
struct vattr *a_vap;
|
|
struct ucred *a_cred;
|
|
struct proc *a_p;
|
|
} */ *ap = v;
|
|
struct filedesc *fdp = ap->a_p->p_fd;
|
|
struct file *fp;
|
|
unsigned fd;
|
|
int error;
|
|
|
|
/*
|
|
* Can't mess with the root vnode
|
|
*/
|
|
switch (VTOFDESC(ap->a_vp)->fd_type) {
|
|
case Fdesc:
|
|
break;
|
|
|
|
case Fctty:
|
|
return (0);
|
|
|
|
default:
|
|
return (EACCES);
|
|
}
|
|
|
|
fd = VTOFDESC(ap->a_vp)->fd_fd;
|
|
if (fd >= fdp->fd_nfiles || (fp = fdp->fd_ofiles[fd]) == NULL) {
|
|
return (EBADF);
|
|
}
|
|
|
|
/*
|
|
* Can setattr the underlying vnode, but not sockets!
|
|
*/
|
|
switch (fp->f_type) {
|
|
case DTYPE_VNODE:
|
|
error = VOP_SETATTR((struct vnode *) fp->f_data, ap->a_vap, ap->a_cred, ap->a_p);
|
|
break;
|
|
|
|
case DTYPE_SOCKET:
|
|
error = 0;
|
|
break;
|
|
|
|
default:
|
|
panic("fdesc setattr");
|
|
break;
|
|
}
|
|
|
|
return (error);
|
|
}
|
|
|
|
#define UIO_MX 32
|
|
|
|
struct fdesc_target {
|
|
ino_t ft_fileno;
|
|
u_char ft_type;
|
|
u_char ft_namlen;
|
|
char *ft_name;
|
|
} fdesc_targets[] = {
|
|
/* NOTE: The name must be less than UIO_MX-16 chars in length */
|
|
#define N(s) sizeof(s)-1, s
|
|
{ FD_DEVFD, DT_DIR, N("fd") },
|
|
{ FD_STDIN, DT_LNK, N("stdin") },
|
|
{ FD_STDOUT, DT_LNK, N("stdout") },
|
|
{ FD_STDERR, DT_LNK, N("stderr") },
|
|
{ FD_CTTY, DT_UNKNOWN, N("tty") },
|
|
#undef N
|
|
};
|
|
static int nfdesc_targets = sizeof(fdesc_targets) / sizeof(fdesc_targets[0]);
|
|
|
|
int
|
|
fdesc_readdir(v)
|
|
void *v;
|
|
{
|
|
struct vop_readdir_args /* {
|
|
struct vnode *a_vp;
|
|
struct uio *a_uio;
|
|
struct ucred *a_cred;
|
|
int *a_eofflag;
|
|
off_t **a_cookies;
|
|
int *a_ncookies;
|
|
} */ *ap = v;
|
|
struct uio *uio = ap->a_uio;
|
|
struct dirent d;
|
|
struct filedesc *fdp;
|
|
int i;
|
|
int error;
|
|
off_t *cookies = NULL;
|
|
int ncookies = 0;
|
|
|
|
switch (VTOFDESC(ap->a_vp)->fd_type) {
|
|
case Fctty:
|
|
return (0);
|
|
|
|
case Fdesc:
|
|
return (ENOTDIR);
|
|
|
|
default:
|
|
break;
|
|
}
|
|
|
|
fdp = uio->uio_procp->p_fd;
|
|
|
|
if (uio->uio_resid < UIO_MX)
|
|
return (EINVAL);
|
|
if (uio->uio_offset < 0)
|
|
return (EINVAL);
|
|
|
|
error = 0;
|
|
i = uio->uio_offset;
|
|
bzero((caddr_t)&d, UIO_MX);
|
|
d.d_reclen = UIO_MX;
|
|
if (ap->a_ncookies)
|
|
ncookies = (uio->uio_resid / UIO_MX);
|
|
|
|
if (VTOFDESC(ap->a_vp)->fd_type == Froot) {
|
|
struct fdesc_target *ft;
|
|
|
|
if (ap->a_ncookies) {
|
|
ncookies = min(ncookies, (nfdesc_targets - i));
|
|
MALLOC(cookies, off_t *, ncookies * sizeof(off_t),
|
|
M_TEMP, M_WAITOK);
|
|
*ap->a_cookies = cookies;
|
|
*ap->a_ncookies = ncookies;
|
|
}
|
|
|
|
for (ft = &fdesc_targets[i];
|
|
uio->uio_resid >= UIO_MX && i < nfdesc_targets; ft++, i++) {
|
|
switch (ft->ft_fileno) {
|
|
case FD_CTTY:
|
|
if (cttyvp(uio->uio_procp) == NULL)
|
|
continue;
|
|
break;
|
|
|
|
case FD_STDIN:
|
|
case FD_STDOUT:
|
|
case FD_STDERR:
|
|
if ((ft->ft_fileno - FD_STDIN) >= fdp->fd_nfiles)
|
|
continue;
|
|
if (fdp->fd_ofiles[ft->ft_fileno - FD_STDIN] == NULL)
|
|
continue;
|
|
break;
|
|
}
|
|
|
|
d.d_fileno = ft->ft_fileno;
|
|
d.d_namlen = ft->ft_namlen;
|
|
bcopy(ft->ft_name, d.d_name, ft->ft_namlen + 1);
|
|
d.d_type = ft->ft_type;
|
|
|
|
if ((error = uiomove((caddr_t)&d, UIO_MX, uio)) != 0)
|
|
break;
|
|
if (cookies)
|
|
*cookies++ = i + 1;
|
|
}
|
|
} else {
|
|
if (ap->a_ncookies) {
|
|
ncookies = min(ncookies, (fdp->fd_nfiles + 2));
|
|
MALLOC(cookies, off_t *, ncookies * sizeof(off_t), M_TEMP, M_WAITOK);
|
|
*ap->a_cookies = cookies;
|
|
*ap->a_ncookies = ncookies;
|
|
}
|
|
for (; i - 2 < fdp->fd_nfiles && uio->uio_resid >= UIO_MX;
|
|
i++) {
|
|
switch (i) {
|
|
case 0:
|
|
case 1:
|
|
d.d_fileno = FD_ROOT; /* XXX */
|
|
d.d_namlen = i + 1;
|
|
bcopy("..", d.d_name, d.d_namlen);
|
|
d.d_name[i + 1] = '\0';
|
|
d.d_type = DT_DIR;
|
|
break;
|
|
|
|
default:
|
|
if (fdp->fd_ofiles[i - 2] == NULL)
|
|
continue;
|
|
d.d_fileno = i - 2 + FD_STDIN;
|
|
d.d_namlen = sprintf(d.d_name, "%d", i - 2);
|
|
d.d_type = DT_UNKNOWN;
|
|
break;
|
|
}
|
|
|
|
if ((error = uiomove((caddr_t)&d, UIO_MX, uio)) != 0)
|
|
break;
|
|
if (cookies)
|
|
*cookies++ = i + 1;
|
|
}
|
|
}
|
|
|
|
if (ap->a_ncookies && error) {
|
|
FREE(*ap->a_cookies, M_TEMP);
|
|
*ap->a_ncookies = 0;
|
|
*ap->a_cookies = NULL;
|
|
}
|
|
|
|
uio->uio_offset = i;
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
fdesc_readlink(v)
|
|
void *v;
|
|
{
|
|
struct vop_readlink_args /* {
|
|
struct vnode *a_vp;
|
|
struct uio *a_uio;
|
|
struct ucred *a_cred;
|
|
} */ *ap = v;
|
|
struct vnode *vp = ap->a_vp;
|
|
int error;
|
|
|
|
if (vp->v_type != VLNK)
|
|
return (EPERM);
|
|
|
|
if (VTOFDESC(vp)->fd_type == Flink) {
|
|
char *ln = VTOFDESC(vp)->fd_link;
|
|
error = uiomove(ln, strlen(ln), ap->a_uio);
|
|
} else {
|
|
error = EOPNOTSUPP;
|
|
}
|
|
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
fdesc_read(v)
|
|
void *v;
|
|
{
|
|
struct vop_read_args /* {
|
|
struct vnode *a_vp;
|
|
struct uio *a_uio;
|
|
int a_ioflag;
|
|
struct ucred *a_cred;
|
|
} */ *ap = v;
|
|
int error = EOPNOTSUPP;
|
|
|
|
switch (VTOFDESC(ap->a_vp)->fd_type) {
|
|
case Fctty:
|
|
error = cttyread(devctty, ap->a_uio, ap->a_ioflag);
|
|
break;
|
|
|
|
default:
|
|
error = EOPNOTSUPP;
|
|
break;
|
|
}
|
|
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
fdesc_write(v)
|
|
void *v;
|
|
{
|
|
struct vop_write_args /* {
|
|
struct vnode *a_vp;
|
|
struct uio *a_uio;
|
|
int a_ioflag;
|
|
struct ucred *a_cred;
|
|
} */ *ap = v;
|
|
int error = EOPNOTSUPP;
|
|
|
|
switch (VTOFDESC(ap->a_vp)->fd_type) {
|
|
case Fctty:
|
|
error = cttywrite(devctty, ap->a_uio, ap->a_ioflag);
|
|
break;
|
|
|
|
default:
|
|
error = EOPNOTSUPP;
|
|
break;
|
|
}
|
|
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
fdesc_ioctl(v)
|
|
void *v;
|
|
{
|
|
struct vop_ioctl_args /* {
|
|
struct vnode *a_vp;
|
|
u_long a_command;
|
|
caddr_t a_data;
|
|
int a_fflag;
|
|
struct ucred *a_cred;
|
|
struct proc *a_p;
|
|
} */ *ap = v;
|
|
int error = EOPNOTSUPP;
|
|
|
|
switch (VTOFDESC(ap->a_vp)->fd_type) {
|
|
case Fctty:
|
|
error = cttyioctl(devctty, ap->a_command, ap->a_data,
|
|
ap->a_fflag, ap->a_p);
|
|
break;
|
|
|
|
default:
|
|
error = EOPNOTSUPP;
|
|
break;
|
|
}
|
|
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
fdesc_poll(v)
|
|
void *v;
|
|
{
|
|
struct vop_poll_args /* {
|
|
struct vnode *a_vp;
|
|
int a_events;
|
|
struct proc *a_p;
|
|
} */ *ap = v;
|
|
int revents;
|
|
|
|
switch (VTOFDESC(ap->a_vp)->fd_type) {
|
|
case Fctty:
|
|
revents = cttypoll(devctty, ap->a_events, ap->a_p);
|
|
break;
|
|
|
|
default:
|
|
revents = genfs_poll(v);
|
|
break;
|
|
}
|
|
|
|
return (revents);
|
|
}
|
|
|
|
int
|
|
fdesc_inactive(v)
|
|
void *v;
|
|
{
|
|
struct vop_inactive_args /* {
|
|
struct vnode *a_vp;
|
|
struct proc *a_p;
|
|
} */ *ap = v;
|
|
struct vnode *vp = ap->a_vp;
|
|
|
|
/*
|
|
* Clear out the v_type field to avoid
|
|
* nasty things happening in vgone().
|
|
*/
|
|
VOP_UNLOCK(vp, 0);
|
|
vp->v_type = VNON;
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
fdesc_reclaim(v)
|
|
void *v;
|
|
{
|
|
struct vop_reclaim_args /* {
|
|
struct vnode *a_vp;
|
|
} */ *ap = v;
|
|
struct vnode *vp = ap->a_vp;
|
|
struct fdescnode *fd = VTOFDESC(vp);
|
|
|
|
LIST_REMOVE(fd, fd_hash);
|
|
FREE(vp->v_data, M_TEMP);
|
|
vp->v_data = 0;
|
|
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Return POSIX pathconf information applicable to special devices.
|
|
*/
|
|
int
|
|
fdesc_pathconf(v)
|
|
void *v;
|
|
{
|
|
struct vop_pathconf_args /* {
|
|
struct vnode *a_vp;
|
|
int a_name;
|
|
register_t *a_retval;
|
|
} */ *ap = v;
|
|
|
|
switch (ap->a_name) {
|
|
case _PC_LINK_MAX:
|
|
*ap->a_retval = LINK_MAX;
|
|
return (0);
|
|
case _PC_MAX_CANON:
|
|
*ap->a_retval = MAX_CANON;
|
|
return (0);
|
|
case _PC_MAX_INPUT:
|
|
*ap->a_retval = MAX_INPUT;
|
|
return (0);
|
|
case _PC_PIPE_BUF:
|
|
*ap->a_retval = PIPE_BUF;
|
|
return (0);
|
|
case _PC_CHOWN_RESTRICTED:
|
|
*ap->a_retval = 1;
|
|
return (0);
|
|
case _PC_VDISABLE:
|
|
*ap->a_retval = _POSIX_VDISABLE;
|
|
return (0);
|
|
default:
|
|
return (EINVAL);
|
|
}
|
|
/* NOTREACHED */
|
|
}
|
|
|
|
/*
|
|
* Print out the contents of a /dev/fd vnode.
|
|
*/
|
|
/* ARGSUSED */
|
|
int
|
|
fdesc_print(v)
|
|
void *v;
|
|
{
|
|
printf("tag VT_NON, fdesc vnode\n");
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
fdesc_link(v)
|
|
void *v;
|
|
{
|
|
struct vop_link_args /* {
|
|
struct vnode *a_dvp;
|
|
struct vnode *a_vp;
|
|
struct componentname *a_cnp;
|
|
} */ *ap = v;
|
|
|
|
VOP_ABORTOP(ap->a_dvp, ap->a_cnp);
|
|
vput(ap->a_dvp);
|
|
return (EROFS);
|
|
}
|
|
|
|
int
|
|
fdesc_symlink(v)
|
|
void *v;
|
|
{
|
|
struct vop_symlink_args /* {
|
|
struct vnode *a_dvp;
|
|
struct vnode **a_vpp;
|
|
struct componentname *a_cnp;
|
|
struct vattr *a_vap;
|
|
char *a_target;
|
|
} */ *ap = v;
|
|
|
|
VOP_ABORTOP(ap->a_dvp, ap->a_cnp);
|
|
vput(ap->a_dvp);
|
|
return (EROFS);
|
|
}
|