| 1 | /* $NetBSD: ext2fs_subr.c,v 1.33 2016/08/13 07:40:10 christos Exp $ */ |
| 2 | |
| 3 | /* |
| 4 | * Copyright (c) 1982, 1986, 1989, 1993 |
| 5 | * The Regents of the University of California. All rights reserved. |
| 6 | * |
| 7 | * Redistribution and use in source and binary forms, with or without |
| 8 | * modification, are permitted provided that the following conditions |
| 9 | * are met: |
| 10 | * 1. Redistributions of source code must retain the above copyright |
| 11 | * notice, this list of conditions and the following disclaimer. |
| 12 | * 2. Redistributions in binary form must reproduce the above copyright |
| 13 | * notice, this list of conditions and the following disclaimer in the |
| 14 | * documentation and/or other materials provided with the distribution. |
| 15 | * 3. Neither the name of the University nor the names of its contributors |
| 16 | * may be used to endorse or promote products derived from this software |
| 17 | * without specific prior written permission. |
| 18 | * |
| 19 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| 20 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 21 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 22 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| 23 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 24 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 25 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 26 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 27 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 28 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 29 | * SUCH DAMAGE. |
| 30 | * |
| 31 | * @(#)ffs_subr.c 8.2 (Berkeley) 9/21/93 |
| 32 | * Modified for ext2fs by Manuel Bouyer. |
| 33 | */ |
| 34 | |
| 35 | /* |
| 36 | * Copyright (c) 1997 Manuel Bouyer. |
| 37 | * |
| 38 | * Redistribution and use in source and binary forms, with or without |
| 39 | * modification, are permitted provided that the following conditions |
| 40 | * are met: |
| 41 | * 1. Redistributions of source code must retain the above copyright |
| 42 | * notice, this list of conditions and the following disclaimer. |
| 43 | * 2. Redistributions in binary form must reproduce the above copyright |
| 44 | * notice, this list of conditions and the following disclaimer in the |
| 45 | * documentation and/or other materials provided with the distribution. |
| 46 | * |
| 47 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| 48 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| 49 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| 50 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| 51 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| 52 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 53 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 54 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 55 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| 56 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 57 | * |
| 58 | * @(#)ffs_subr.c 8.2 (Berkeley) 9/21/93 |
| 59 | * Modified for ext2fs by Manuel Bouyer. |
| 60 | */ |
| 61 | |
| 62 | #include <sys/cdefs.h> |
| 63 | __KERNEL_RCSID(0, "$NetBSD: ext2fs_subr.c,v 1.33 2016/08/13 07:40:10 christos Exp $" ); |
| 64 | |
| 65 | #include <sys/param.h> |
| 66 | #include <sys/systm.h> |
| 67 | #include <sys/vnode.h> |
| 68 | #include <sys/buf.h> |
| 69 | #include <sys/inttypes.h> |
| 70 | #include <sys/kauth.h> |
| 71 | |
| 72 | #include <ufs/ufs/inode.h> |
| 73 | #include <ufs/ext2fs/ext2fs.h> |
| 74 | #include <ufs/ext2fs/ext2fs_extern.h> |
| 75 | |
| 76 | /* |
| 77 | * Return buffer with the contents of block "offset" from the beginning of |
| 78 | * directory "ip". If "res" is non-zero, fill it in with a pointer to the |
| 79 | * remaining space in the directory. |
| 80 | */ |
| 81 | int |
| 82 | ext2fs_blkatoff(struct vnode *vp, off_t offset, char **res, struct buf **bpp) |
| 83 | { |
| 84 | struct inode *ip; |
| 85 | struct m_ext2fs *fs; |
| 86 | struct buf *bp; |
| 87 | daddr_t lbn; |
| 88 | int error; |
| 89 | |
| 90 | ip = VTOI(vp); |
| 91 | fs = ip->i_e2fs; |
| 92 | lbn = ext2_lblkno(fs, offset); |
| 93 | |
| 94 | *bpp = NULL; |
| 95 | if ((error = bread(vp, lbn, fs->e2fs_bsize, 0, &bp)) != 0) { |
| 96 | return error; |
| 97 | } |
| 98 | if (res) |
| 99 | *res = (char *)bp->b_data + ext2_blkoff(fs, offset); |
| 100 | *bpp = bp; |
| 101 | return 0; |
| 102 | } |
| 103 | |
| 104 | void |
| 105 | ext2fs_itimes(struct inode *ip, const struct timespec *acc, |
| 106 | const struct timespec *mod, const struct timespec *cre) |
| 107 | { |
| 108 | struct timespec now; |
| 109 | |
| 110 | if (!(ip->i_flag & (IN_ACCESS | IN_CHANGE | IN_UPDATE | IN_MODIFY))) { |
| 111 | return; |
| 112 | } |
| 113 | |
| 114 | vfs_timestamp(&now); |
| 115 | if (ip->i_flag & IN_ACCESS) { |
| 116 | if (acc == NULL) |
| 117 | acc = &now; |
| 118 | EXT2_DINODE_TIME_SET(acc, ip->i_din.e2fs_din, e2di_atime, EXT2_DINODE_SIZE(ip->i_e2fs)); |
| 119 | } |
| 120 | if (ip->i_flag & (IN_UPDATE | IN_MODIFY)) { |
| 121 | if (mod == NULL) |
| 122 | mod = &now; |
| 123 | EXT2_DINODE_TIME_SET(mod, ip->i_din.e2fs_din, e2di_mtime, EXT2_DINODE_SIZE(ip->i_e2fs)); |
| 124 | ip->i_modrev++; |
| 125 | } |
| 126 | if (ip->i_flag & (IN_CHANGE | IN_MODIFY)) { |
| 127 | if (cre == NULL) |
| 128 | cre = &now; |
| 129 | EXT2_DINODE_TIME_SET(cre, ip->i_din.e2fs_din, e2di_ctime, EXT2_DINODE_SIZE(ip->i_e2fs)); |
| 130 | } |
| 131 | if (ip->i_flag & (IN_ACCESS | IN_MODIFY)) |
| 132 | ip->i_flag |= IN_ACCESSED; |
| 133 | if (ip->i_flag & (IN_UPDATE | IN_CHANGE)) |
| 134 | ip->i_flag |= IN_MODIFIED; |
| 135 | ip->i_flag &= ~(IN_ACCESS | IN_CHANGE | IN_UPDATE | IN_MODIFY); |
| 136 | } |
| 137 | |