e09154bf75
On the one hand, FIFOs should respect other variables not supported by the fifofs vnode operation (such as _PC_NAME_MAX, _PC_LINK_MAX, etc.). These values are fs-specific and must come from a fs-specific method. On the other hand, filesystems that support FIFOs are required to support _PC_PIPE_BUF on directory vnodes that can contain FIFOs. Given this latter requirement, once the fs-specific VOP_PATHCONF method supports _PC_PIPE_BUF for directories, it is also suitable for FIFOs permitting a single VOP_PATHCONF method to be used for both FIFOs and non-FIFOs. To that end, retire all of the FIFO-specific pathconf methods from filesystems and change FIFO-specific vnode operation switches to use the existing fs-specific VOP_PATHCONF method. For fifofs, set it's VOP_PATHCONF to VOP_PANIC since it should no longer be used. While here, move _PC_PIPE_BUF handling out of vop_stdpathconf() so that only filesystems supporting FIFOs will report a value. In addition, only report a valid _PC_PIPE_BUF for directories and FIFOs. Discussed with: bde Reviewed by: kib (part of a larger patch) MFC after: 1 month Sponsored by: Chelsio Communications Differential Revision: https://reviews.freebsd.org/D12572
77 lines
2.6 KiB
C
77 lines
2.6 KiB
C
/* $NetBSD: tmpfs_fifoops.c,v 1.5 2005/12/11 12:24:29 christos Exp $ */
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/*-
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* SPDX-License-Identifier: BSD-2-Clause-NetBSD
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*
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* Copyright (c) 2005 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Julio M. Merino Vidal, developed as part of Google's Summer of Code
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* 2005 program.
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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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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* tmpfs vnode interface for named pipes.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/mount.h>
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#include <sys/proc.h>
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#include <sys/vnode.h>
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#include <vm/vm.h>
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#include <vm/vm_object.h>
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#include <fs/tmpfs/tmpfs.h>
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#include <fs/tmpfs/tmpfs_fifoops.h>
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#include <fs/tmpfs/tmpfs_vnops.h>
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static int
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tmpfs_fifo_close(struct vop_close_args *v)
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{
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struct tmpfs_node *node;
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node = VP_TO_TMPFS_NODE(v->a_vp);
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tmpfs_set_status(node, TMPFS_NODE_ACCESSED);
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tmpfs_update(v->a_vp);
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return (fifo_specops.vop_close(v));
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}
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/*
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* vnode operations vector used for fifos stored in a tmpfs file system.
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*/
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struct vop_vector tmpfs_fifoop_entries = {
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.vop_default = &fifo_specops,
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.vop_close = tmpfs_fifo_close,
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.vop_reclaim = tmpfs_reclaim,
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.vop_access = tmpfs_access,
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.vop_getattr = tmpfs_getattr,
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.vop_setattr = tmpfs_setattr,
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.vop_pathconf = tmpfs_pathconf,
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.vop_print = tmpfs_print,
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};
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