1 /* $NetBSD: tmpfs_specops.c,v 1.13 2020/05/16 18:31:49 christos 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 special devices. 35 */ 36 37 #include <sys/cdefs.h> 38 __KERNEL_RCSID(0, "$NetBSD: tmpfs_specops.c,v 1.13 2020/05/16 18:31:49 christos Exp $"); 39 40 #include <sys/param.h> 41 #include <sys/vnode.h> 42 43 #include <fs/tmpfs/tmpfs.h> 44 #include <fs/tmpfs/tmpfs_specops.h> 45 46 /* 47 * vnode operations vector used for special devices stored in a tmpfs 48 * file system. 49 */ 50 51 int (**tmpfs_specop_p)(void *); 52 53 const struct vnodeopv_entry_desc tmpfs_specop_entries[] = { 54 { &vop_default_desc, vn_default_error }, 55 { &vop_lookup_desc, tmpfs_spec_lookup }, 56 { &vop_create_desc, tmpfs_spec_create }, 57 { &vop_mknod_desc, tmpfs_spec_mknod }, 58 { &vop_open_desc, tmpfs_spec_open }, 59 { &vop_close_desc, tmpfs_spec_close }, 60 { &vop_access_desc, tmpfs_spec_access }, 61 { &vop_accessx_desc, genfs_accessx }, 62 { &vop_getattr_desc, tmpfs_spec_getattr }, 63 { &vop_setattr_desc, tmpfs_spec_setattr }, 64 { &vop_read_desc, tmpfs_spec_read }, 65 { &vop_write_desc, tmpfs_spec_write }, 66 { &vop_fallocate_desc, spec_fallocate }, 67 { &vop_fdiscard_desc, spec_fdiscard }, 68 { &vop_ioctl_desc, tmpfs_spec_ioctl }, 69 { &vop_fcntl_desc, tmpfs_spec_fcntl }, 70 { &vop_poll_desc, tmpfs_spec_poll }, 71 { &vop_kqfilter_desc, tmpfs_spec_kqfilter }, 72 { &vop_revoke_desc, tmpfs_spec_revoke }, 73 { &vop_mmap_desc, tmpfs_spec_mmap }, 74 { &vop_fsync_desc, tmpfs_spec_fsync }, 75 { &vop_seek_desc, tmpfs_spec_seek }, 76 { &vop_remove_desc, tmpfs_spec_remove }, 77 { &vop_link_desc, tmpfs_spec_link }, 78 { &vop_rename_desc, tmpfs_spec_rename }, 79 { &vop_mkdir_desc, tmpfs_spec_mkdir }, 80 { &vop_rmdir_desc, tmpfs_spec_rmdir }, 81 { &vop_symlink_desc, tmpfs_spec_symlink }, 82 { &vop_readdir_desc, tmpfs_spec_readdir }, 83 { &vop_readlink_desc, tmpfs_spec_readlink }, 84 { &vop_abortop_desc, tmpfs_spec_abortop }, 85 { &vop_inactive_desc, tmpfs_spec_inactive }, 86 { &vop_reclaim_desc, tmpfs_spec_reclaim }, 87 { &vop_lock_desc, tmpfs_spec_lock }, 88 { &vop_unlock_desc, tmpfs_spec_unlock }, 89 { &vop_bmap_desc, tmpfs_spec_bmap }, 90 { &vop_strategy_desc, tmpfs_spec_strategy }, 91 { &vop_print_desc, tmpfs_spec_print }, 92 { &vop_pathconf_desc, tmpfs_spec_pathconf }, 93 { &vop_islocked_desc, tmpfs_spec_islocked }, 94 { &vop_advlock_desc, tmpfs_spec_advlock }, 95 { &vop_bwrite_desc, tmpfs_spec_bwrite }, 96 { &vop_getpages_desc, tmpfs_spec_getpages }, 97 { &vop_putpages_desc, tmpfs_spec_putpages }, 98 { NULL, NULL } 99 }; 100 101 const struct vnodeopv_desc tmpfs_specop_opv_desc = { 102 &tmpfs_specop_p, tmpfs_specop_entries 103 }; 104 105 int 106 tmpfs_spec_close(void *v) 107 { 108 struct vop_close_args /* { 109 struct vnode *a_vp; 110 int a_fflag; 111 kauth_cred_t a_cred; 112 } */ *ap __unused = v; 113 114 return VOCALL(spec_vnodeop_p, VOFFSET(vop_close), v); 115 } 116 117 int 118 tmpfs_spec_read(void *v) 119 { 120 struct vop_read_args /* { 121 struct vnode *a_vp; 122 struct uio *a_uio; 123 int a_ioflag; 124 kauth_cred_t a_cred; 125 } */ *ap = v; 126 vnode_t *vp = ap->a_vp; 127 128 tmpfs_update(vp, TMPFS_UPDATE_ATIME); 129 return VOCALL(spec_vnodeop_p, VOFFSET(vop_read), v); 130 } 131 132 int 133 tmpfs_spec_write(void *v) 134 { 135 struct vop_write_args /* { 136 struct vnode *a_vp; 137 struct uio *a_uio; 138 int a_ioflag; 139 kauth_cred_t a_cred; 140 } */ *ap = v; 141 vnode_t *vp = ap->a_vp; 142 143 tmpfs_update(vp, TMPFS_UPDATE_MTIME); 144 return VOCALL(spec_vnodeop_p, VOFFSET(vop_write), v); 145 } 146