120 lines
3.6 KiB
C
120 lines
3.6 KiB
C
/* $NetBSD: tmpfs_specops.c,v 1.16 2021/07/19 01:30:25 dholland Exp $ */
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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 special devices.
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: tmpfs_specops.c,v 1.16 2021/07/19 01:30:25 dholland Exp $");
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#include <sys/param.h>
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#include <sys/vnode.h>
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#include <fs/tmpfs/tmpfs.h>
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#include <fs/tmpfs/tmpfs_specops.h>
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/*
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* vnode operations vector used for special devices stored in a tmpfs
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* file system.
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*/
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int (**tmpfs_specop_p)(void *);
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const struct vnodeopv_entry_desc tmpfs_specop_entries[] = {
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{ &vop_default_desc, vn_default_error },
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GENFS_SPECOP_ENTRIES,
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{ &vop_close_desc, tmpfs_spec_close },
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{ &vop_access_desc, tmpfs_access },
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{ &vop_accessx_desc, genfs_accessx },
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{ &vop_getattr_desc, tmpfs_getattr },
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{ &vop_setattr_desc, tmpfs_setattr },
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{ &vop_read_desc, tmpfs_spec_read },
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{ &vop_write_desc, tmpfs_spec_write },
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{ &vop_fcntl_desc, genfs_fcntl },
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{ &vop_fsync_desc, spec_fsync },
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{ &vop_inactive_desc, tmpfs_inactive },
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{ &vop_reclaim_desc, tmpfs_reclaim },
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{ &vop_lock_desc, genfs_lock },
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{ &vop_unlock_desc, genfs_unlock },
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{ &vop_print_desc, tmpfs_print },
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{ &vop_islocked_desc, genfs_islocked },
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{ &vop_bwrite_desc, vn_bwrite },
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{ NULL, NULL }
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};
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const struct vnodeopv_desc tmpfs_specop_opv_desc = {
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&tmpfs_specop_p, tmpfs_specop_entries
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};
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int
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tmpfs_spec_close(void *v)
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{
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struct vop_close_args /* {
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struct vnode *a_vp;
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int a_fflag;
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kauth_cred_t a_cred;
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} */ *ap __unused = v;
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return VOCALL(spec_vnodeop_p, VOFFSET(vop_close), v);
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}
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int
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tmpfs_spec_read(void *v)
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{
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struct vop_read_args /* {
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struct vnode *a_vp;
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struct uio *a_uio;
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int a_ioflag;
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kauth_cred_t a_cred;
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} */ *ap = v;
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vnode_t *vp = ap->a_vp;
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tmpfs_update(vp, TMPFS_UPDATE_ATIME);
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return VOCALL(spec_vnodeop_p, VOFFSET(vop_read), v);
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}
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int
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tmpfs_spec_write(void *v)
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{
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struct vop_write_args /* {
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struct vnode *a_vp;
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struct uio *a_uio;
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int a_ioflag;
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kauth_cred_t a_cred;
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} */ *ap = v;
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vnode_t *vp = ap->a_vp;
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tmpfs_update(vp, TMPFS_UPDATE_MTIME);
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return VOCALL(spec_vnodeop_p, VOFFSET(vop_write), v);
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}
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