| 1 | /* $NetBSD: tmpfs_specops.c,v 1.12 2014/07/25 08:20:52 dholland 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 1.12 2014/07/25 08:20:52 dholland 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_getattr_desc, tmpfs_spec_getattr }, |
| 62 | { &vop_setattr_desc, tmpfs_spec_setattr }, |
| 63 | { &vop_read_desc, tmpfs_spec_read }, |
| 64 | { &vop_write_desc, tmpfs_spec_write }, |
| 65 | { &vop_fallocate_desc, spec_fallocate }, |
| 66 | { &vop_fdiscard_desc, spec_fdiscard }, |
| 67 | { &vop_ioctl_desc, tmpfs_spec_ioctl }, |
| 68 | { &vop_fcntl_desc, tmpfs_spec_fcntl }, |
| 69 | { &vop_poll_desc, tmpfs_spec_poll }, |
| 70 | { &vop_kqfilter_desc, tmpfs_spec_kqfilter }, |
| 71 | { &vop_revoke_desc, tmpfs_spec_revoke }, |
| 72 | { &vop_mmap_desc, tmpfs_spec_mmap }, |
| 73 | { &vop_fsync_desc, tmpfs_spec_fsync }, |
| 74 | { &vop_seek_desc, tmpfs_spec_seek }, |
| 75 | { &vop_remove_desc, tmpfs_spec_remove }, |
| 76 | { &vop_link_desc, tmpfs_spec_link }, |
| 77 | { &vop_rename_desc, tmpfs_spec_rename }, |
| 78 | { &vop_mkdir_desc, tmpfs_spec_mkdir }, |
| 79 | { &vop_rmdir_desc, tmpfs_spec_rmdir }, |
| 80 | { &vop_symlink_desc, tmpfs_spec_symlink }, |
| 81 | { &vop_readdir_desc, tmpfs_spec_readdir }, |
| 82 | { &vop_readlink_desc, tmpfs_spec_readlink }, |
| 83 | { &vop_abortop_desc, tmpfs_spec_abortop }, |
| 84 | { &vop_inactive_desc, tmpfs_spec_inactive }, |
| 85 | { &vop_reclaim_desc, tmpfs_spec_reclaim }, |
| 86 | { &vop_lock_desc, tmpfs_spec_lock }, |
| 87 | { &vop_unlock_desc, tmpfs_spec_unlock }, |
| 88 | { &vop_bmap_desc, tmpfs_spec_bmap }, |
| 89 | { &vop_strategy_desc, tmpfs_spec_strategy }, |
| 90 | { &vop_print_desc, tmpfs_spec_print }, |
| 91 | { &vop_pathconf_desc, tmpfs_spec_pathconf }, |
| 92 | { &vop_islocked_desc, tmpfs_spec_islocked }, |
| 93 | { &vop_advlock_desc, tmpfs_spec_advlock }, |
| 94 | { &vop_bwrite_desc, tmpfs_spec_bwrite }, |
| 95 | { &vop_getpages_desc, tmpfs_spec_getpages }, |
| 96 | { &vop_putpages_desc, tmpfs_spec_putpages }, |
| 97 | { NULL, NULL } |
| 98 | }; |
| 99 | |
| 100 | const struct vnodeopv_desc tmpfs_specop_opv_desc = { |
| 101 | &tmpfs_specop_p, tmpfs_specop_entries |
| 102 | }; |
| 103 | |
| 104 | int |
| 105 | tmpfs_spec_close(void *v) |
| 106 | { |
| 107 | struct vop_close_args /* { |
| 108 | struct vnode *a_vp; |
| 109 | int a_fflag; |
| 110 | kauth_cred_t a_cred; |
| 111 | } */ *ap __unused = v; |
| 112 | |
| 113 | return VOCALL(spec_vnodeop_p, VOFFSET(vop_close), v); |
| 114 | } |
| 115 | |
| 116 | int |
| 117 | tmpfs_spec_read(void *v) |
| 118 | { |
| 119 | struct vop_read_args /* { |
| 120 | struct vnode *a_vp; |
| 121 | struct uio *a_uio; |
| 122 | int a_ioflag; |
| 123 | kauth_cred_t a_cred; |
| 124 | } */ *ap = v; |
| 125 | vnode_t *vp = ap->a_vp; |
| 126 | |
| 127 | tmpfs_update(vp, TMPFS_UPDATE_ATIME); |
| 128 | return VOCALL(spec_vnodeop_p, VOFFSET(vop_read), v); |
| 129 | } |
| 130 | |
| 131 | int |
| 132 | tmpfs_spec_write(void *v) |
| 133 | { |
| 134 | struct vop_write_args /* { |
| 135 | struct vnode *a_vp; |
| 136 | struct uio *a_uio; |
| 137 | int a_ioflag; |
| 138 | kauth_cred_t a_cred; |
| 139 | } */ *ap = v; |
| 140 | vnode_t *vp = ap->a_vp; |
| 141 | |
| 142 | tmpfs_update(vp, TMPFS_UPDATE_MTIME); |
| 143 | return VOCALL(spec_vnodeop_p, VOFFSET(vop_write), v); |
| 144 | } |
| 145 | |