sys/ufs/ext2fs/ext2fs_subr.c

   1 /*      $NetBSD: ext2fs_subr.c,v 1.27 2009/10/19 18:41:17 bouyer 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 1.27 2009/10/19 18:41:17 bouyer 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 = lblkno(fs, offset);
  93
  94         *bpp = NULL;
  95         if ((error = bread(vp, lbn, fs->e2fs_bsize, NOCRED, 0, &bp)) != 0) {
  96                 brelse(bp, 0);
  97                 return (error);
  98         }
  99         if (res)
 100                 *res = (char *)bp->b_data + blkoff(fs, offset);
 101         *bpp = bp;
 102         return (0);
 103 }
 104
 105 void
 106 ext2fs_itimes(struct inode *ip, const struct timespec *acc,
 107     const struct timespec *mod, const struct timespec *cre)
 108 {
 109         struct timespec now;
 110
 111         if (!(ip->i_flag & (IN_ACCESS | IN_CHANGE | IN_UPDATE | IN_MODIFY))) {
 112                 return;
 113         }
 114
 115         vfs_timestamp(&now);
 116         if (ip->i_flag & IN_ACCESS) {
 117                 if (acc == NULL)
 118                         acc = &now;
 119                 ip->i_e2fs_atime = acc->tv_sec;
 120         }
 121         if (ip->i_flag & (IN_UPDATE | IN_MODIFY)) {
 122                 if (mod == NULL)
 123                         mod = &now;
 124                 ip->i_e2fs_mtime = mod->tv_sec;
 125                 ip->i_modrev++;
 126         }
 127         if (ip->i_flag & (IN_CHANGE | IN_MODIFY)) {
 128                 if (cre == NULL)
 129                         cre = &now;
 130                 ip->i_e2fs_ctime = cre->tv_sec;
 131         }
 132         if (ip->i_flag & (IN_ACCESS | IN_MODIFY))
 133                 ip->i_flag |= IN_ACCESSED;
 134         if (ip->i_flag & (IN_UPDATE | IN_CHANGE))
 135                 ip->i_flag |= IN_MODIFIED;
 136         ip->i_flag &= ~(IN_ACCESS | IN_CHANGE | IN_UPDATE | IN_MODIFY);
 137 }