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tmpfs_fifoops.c revision 1.5.18.2 
      1 /*	$NetBSD: tmpfs_fifoops.c,v 1.5.18.2 2006/06/21 15:09:36 yamt Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 2005 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Julio M. Merino Vidal, developed as part of Google's Summer of Code
      9  * 2005 program.
     10  *
     11  * Redistribution and use in source and binary forms, with or without
     12  * modification, are permitted provided that the following conditions
     13  * are met:
     14  * 1. Redistributions of source code must retain the above copyright
     15  *    notice, this list of conditions and the following disclaimer.
     16  * 2. Redistributions in binary form must reproduce the above copyright
     17  *    notice, this list of conditions and the following disclaimer in the
     18  *    documentation and/or other materials provided with the distribution.
     19  * 3. All advertising materials mentioning features or use of this software
     20  *    must display the following acknowledgement:
     21  *        This product includes software developed by the NetBSD
     22  *        Foundation, Inc. and its contributors.
     23  * 4. Neither the name of The NetBSD Foundation nor the names of its
     24  *    contributors may be used to endorse or promote products derived
     25  *    from this software without specific prior written permission.
     26  *
     27  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     28  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     29  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     30  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     31  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     32  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     33  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     34  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     35  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     36  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     37  * POSSIBILITY OF SUCH DAMAGE.
     38  */
     39 
     40 /*
     41  * tmpfs vnode interface for named pipes.
     42  */
     43 
     44 #include <sys/cdefs.h>
     45 __KERNEL_RCSID(0, "$NetBSD: tmpfs_fifoops.c,v 1.5.18.2 2006/06/21 15:09:36 yamt Exp $");
     46 
     47 #include <sys/param.h>
     48 #include <sys/vnode.h>
     49 
     50 #include <fs/tmpfs/tmpfs.h>
     51 #include <fs/tmpfs/tmpfs_fifoops.h>
     52 
     53 /* --------------------------------------------------------------------- */
     54 
     55 /*
     56  * vnode operations vector used for fifos stored in a tmpfs file system.
     57  */
     58 int (**tmpfs_fifoop_p)(void *);
     59 const struct vnodeopv_entry_desc tmpfs_fifoop_entries[] = {
     60 	{ &vop_default_desc,		vn_default_error },
     61 	{ &vop_lookup_desc,		tmpfs_fifo_lookup },
     62 	{ &vop_create_desc,		tmpfs_fifo_create },
     63 	{ &vop_mknod_desc,		tmpfs_fifo_mknod },
     64 	{ &vop_open_desc,		tmpfs_fifo_open },
     65 	{ &vop_close_desc,		tmpfs_fifo_close },
     66 	{ &vop_access_desc,		tmpfs_fifo_access },
     67 	{ &vop_getattr_desc,		tmpfs_fifo_getattr },
     68 	{ &vop_setattr_desc,		tmpfs_fifo_setattr },
     69 	{ &vop_read_desc,		tmpfs_fifo_read },
     70 	{ &vop_write_desc,		tmpfs_fifo_write },
     71 	{ &vop_ioctl_desc,		tmpfs_fifo_ioctl },
     72 	{ &vop_fcntl_desc,		tmpfs_fifo_fcntl },
     73 	{ &vop_poll_desc,		tmpfs_fifo_poll },
     74 	{ &vop_kqfilter_desc,		tmpfs_fifo_kqfilter },
     75 	{ &vop_revoke_desc,		tmpfs_fifo_revoke },
     76 	{ &vop_mmap_desc,		tmpfs_fifo_mmap },
     77 	{ &vop_fsync_desc,		tmpfs_fifo_fsync },
     78 	{ &vop_seek_desc,		tmpfs_fifo_seek },
     79 	{ &vop_remove_desc,		tmpfs_fifo_remove },
     80 	{ &vop_link_desc,		tmpfs_fifo_link },
     81 	{ &vop_rename_desc,		tmpfs_fifo_rename },
     82 	{ &vop_mkdir_desc,		tmpfs_fifo_mkdir },
     83 	{ &vop_rmdir_desc,		tmpfs_fifo_rmdir },
     84 	{ &vop_symlink_desc,		tmpfs_fifo_symlink },
     85 	{ &vop_readdir_desc,		tmpfs_fifo_readdir },
     86 	{ &vop_readlink_desc,		tmpfs_fifo_readlink },
     87 	{ &vop_abortop_desc,		tmpfs_fifo_abortop },
     88 	{ &vop_inactive_desc,		tmpfs_fifo_inactive },
     89 	{ &vop_reclaim_desc,		tmpfs_fifo_reclaim },
     90 	{ &vop_lock_desc,		tmpfs_fifo_lock },
     91 	{ &vop_unlock_desc,		tmpfs_fifo_unlock },
     92 	{ &vop_bmap_desc,		tmpfs_fifo_bmap },
     93 	{ &vop_strategy_desc,		tmpfs_fifo_strategy },
     94 	{ &vop_print_desc,		tmpfs_fifo_print },
     95 	{ &vop_pathconf_desc,		tmpfs_fifo_pathconf },
     96 	{ &vop_islocked_desc,		tmpfs_fifo_islocked },
     97 	{ &vop_advlock_desc,		tmpfs_fifo_advlock },
     98 	{ &vop_lease_desc,		tmpfs_fifo_lease },
     99 	{ &vop_bwrite_desc,		tmpfs_fifo_bwrite },
    100 	{ &vop_getpages_desc,		tmpfs_fifo_getpages },
    101 	{ &vop_putpages_desc,		tmpfs_fifo_putpages },
    102 	{ NULL, NULL }
    103 };
    104 const struct vnodeopv_desc tmpfs_fifoop_opv_desc =
    105 	{ &tmpfs_fifoop_p, tmpfs_fifoop_entries };
    106 
    107 /* --------------------------------------------------------------------- */
    108 
    109 int
    110 tmpfs_fifo_close(void *v)
    111 {
    112 	struct vnode *vp = ((struct vop_close_args *)v)->a_vp;
    113 
    114 	int error;
    115 
    116 	tmpfs_update(vp, NULL, NULL, UPDATE_CLOSE);
    117 	error = VOCALL(fifo_vnodeop_p, VOFFSET(vop_close), v);
    118 
    119 	return error;
    120 }
    121 
    122 /* --------------------------------------------------------------------- */
    123 
    124 int
    125 tmpfs_fifo_read(void *v)
    126 {
    127 	struct vnode *vp = ((struct vop_read_args *)v)->a_vp;
    128 
    129 	VP_TO_TMPFS_NODE(vp)->tn_status |= TMPFS_NODE_ACCESSED;
    130 	return VOCALL(fifo_vnodeop_p, VOFFSET(vop_read), v);
    131 }
    132 
    133 /* --------------------------------------------------------------------- */
    134 
    135 int
    136 tmpfs_fifo_write(void *v)
    137 {
    138 	struct vnode *vp = ((struct vop_write_args *)v)->a_vp;
    139 
    140 	VP_TO_TMPFS_NODE(vp)->tn_status |= TMPFS_NODE_MODIFIED;
    141 	return VOCALL(fifo_vnodeop_p, VOFFSET(vop_write), v);
    142 }
    143