1 /* $NetBSD: tmpfs_fifoops.c,v 1.8 2008/06/19 23:57:22 skd 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 * 20 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 22 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 23 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 24 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 30 * POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 /* 34 * tmpfs vnode interface for named pipes. 35 */ 36 37 #include <sys/cdefs.h> 38 __KERNEL_RCSID(0, "$NetBSD: tmpfs_fifoops.c,v 1.8 2008/06/19 23:57:22 skd Exp $"); 39 40 #include <sys/param.h> 41 #include <sys/vnode.h> 42 43 #include <fs/tmpfs/tmpfs.h> 44 #include <fs/tmpfs/tmpfs_fifoops.h> 45 46 /* --------------------------------------------------------------------- */ 47 48 /* 49 * vnode operations vector used for fifos stored in a tmpfs file system. 50 */ 51 int (**tmpfs_fifoop_p)(void *); 52 const struct vnodeopv_entry_desc tmpfs_fifoop_entries[] = { 53 { &vop_default_desc, vn_default_error }, 54 { &vop_lookup_desc, tmpfs_fifo_lookup }, 55 { &vop_create_desc, tmpfs_fifo_create }, 56 { &vop_mknod_desc, tmpfs_fifo_mknod }, 57 { &vop_open_desc, tmpfs_fifo_open }, 58 { &vop_close_desc, tmpfs_fifo_close }, 59 { &vop_access_desc, tmpfs_fifo_access }, 60 { &vop_getattr_desc, tmpfs_fifo_getattr }, 61 { &vop_setattr_desc, tmpfs_fifo_setattr }, 62 { &vop_read_desc, tmpfs_fifo_read }, 63 { &vop_write_desc, tmpfs_fifo_write }, 64 { &vop_ioctl_desc, tmpfs_fifo_ioctl }, 65 { &vop_fcntl_desc, tmpfs_fifo_fcntl }, 66 { &vop_poll_desc, tmpfs_fifo_poll }, 67 { &vop_kqfilter_desc, tmpfs_fifo_kqfilter }, 68 { &vop_revoke_desc, tmpfs_fifo_revoke }, 69 { &vop_mmap_desc, tmpfs_fifo_mmap }, 70 { &vop_fsync_desc, tmpfs_fifo_fsync }, 71 { &vop_seek_desc, tmpfs_fifo_seek }, 72 { &vop_remove_desc, tmpfs_fifo_remove }, 73 { &vop_link_desc, tmpfs_fifo_link }, 74 { &vop_rename_desc, tmpfs_fifo_rename }, 75 { &vop_mkdir_desc, tmpfs_fifo_mkdir }, 76 { &vop_rmdir_desc, tmpfs_fifo_rmdir }, 77 { &vop_symlink_desc, tmpfs_fifo_symlink }, 78 { &vop_readdir_desc, tmpfs_fifo_readdir }, 79 { &vop_readlink_desc, tmpfs_fifo_readlink }, 80 { &vop_abortop_desc, tmpfs_fifo_abortop }, 81 { &vop_inactive_desc, tmpfs_fifo_inactive }, 82 { &vop_reclaim_desc, tmpfs_fifo_reclaim }, 83 { &vop_lock_desc, tmpfs_fifo_lock }, 84 { &vop_unlock_desc, tmpfs_fifo_unlock }, 85 { &vop_bmap_desc, tmpfs_fifo_bmap }, 86 { &vop_strategy_desc, tmpfs_fifo_strategy }, 87 { &vop_print_desc, tmpfs_fifo_print }, 88 { &vop_pathconf_desc, tmpfs_fifo_pathconf }, 89 { &vop_islocked_desc, tmpfs_fifo_islocked }, 90 { &vop_advlock_desc, tmpfs_fifo_advlock }, 91 { &vop_bwrite_desc, tmpfs_fifo_bwrite }, 92 { &vop_getpages_desc, tmpfs_fifo_getpages }, 93 { &vop_putpages_desc, tmpfs_fifo_putpages }, 94 { NULL, NULL } 95 }; 96 const struct vnodeopv_desc tmpfs_fifoop_opv_desc = 97 { &tmpfs_fifoop_p, tmpfs_fifoop_entries }; 98 99 /* --------------------------------------------------------------------- */ 100 101 int 102 tmpfs_fifo_close(void *v) 103 { 104 struct vnode *vp = ((struct vop_close_args *)v)->a_vp; 105 106 int error; 107 108 tmpfs_update(vp, NULL, NULL, NULL, UPDATE_CLOSE); 109 error = VOCALL(fifo_vnodeop_p, VOFFSET(vop_close), v); 110 111 return error; 112 } 113 114 /* --------------------------------------------------------------------- */ 115 116 int 117 tmpfs_fifo_read(void *v) 118 { 119 struct vnode *vp = ((struct vop_read_args *)v)->a_vp; 120 121 VP_TO_TMPFS_NODE(vp)->tn_status |= TMPFS_NODE_ACCESSED; 122 return VOCALL(fifo_vnodeop_p, VOFFSET(vop_read), v); 123 } 124 125 /* --------------------------------------------------------------------- */ 126 127 int 128 tmpfs_fifo_write(void *v) 129 { 130 struct vnode *vp = ((struct vop_write_args *)v)->a_vp; 131 132 VP_TO_TMPFS_NODE(vp)->tn_status |= TMPFS_NODE_MODIFIED; 133 return VOCALL(fifo_vnodeop_p, VOFFSET(vop_write), v); 134 } 135