ufs_gjournal.c

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    1 /*-
    2  * Copyright (c) 2005-2006 Pawel Jakub Dawidek <pjd@FreeBSD.org>
    3  * All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer.
   10  * 2. Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in the
   12  *    documentation and/or other materials provided with the distribution.
   13  *
   14  * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
   15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
   18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   24  * SUCH DAMAGE.
   25  */
   26 
   27 #include <sys/cdefs.h>
   28 __FBSDID("$FreeBSD$");
   29 
   30 #include "opt_ufs.h"
   31 
   32 #ifdef UFS_GJOURNAL
   33 
   34 #include <sys/param.h>
   35 #include <sys/systm.h>
   36 #include <sys/kernel.h>
   37 #include <sys/vnode.h>
   38 #include <sys/lock.h>
   39 #include <sys/mount.h>
   40 #include <sys/mutex.h>
   41 
   42 #include <ufs/ufs/extattr.h>
   43 #include <ufs/ufs/quota.h>
   44 #include <ufs/ufs/inode.h>
   45 #include <ufs/ufs/ufsmount.h>
   46 #include <ufs/ufs/gjournal.h>
   47 
   48 #include <ufs/ffs/fs.h>
   49 #include <ufs/ffs/ffs_extern.h>
   50 
   51 /*
   52  * Change the number of unreferenced inodes.
   53  */
   54 static int
   55 ufs_gjournal_modref(struct vnode *vp, int count)
   56 {
   57         struct cg *cgp;
   58         struct buf *bp;
   59         ufs2_daddr_t cgbno;
   60         int error, cg;
   61         struct cdev *dev;
   62         struct inode *ip;
   63         struct ufsmount *ump;
   64         struct fs *fs;
   65         struct vnode *devvp;
   66         ino_t ino;
   67 
   68         ip = VTOI(vp);
   69         ump = ip->i_ump;
   70         fs = ip->i_fs;
   71         devvp = ip->i_devvp;
   72         ino = ip->i_number;
   73 
   74         cg = ino_to_cg(fs, ino);
   75         if (devvp->v_type != VCHR) {
   76                 /* devvp is a snapshot */
   77                 dev = VTOI(devvp)->i_devvp->v_rdev;
   78                 cgbno = fragstoblks(fs, cgtod(fs, cg));
   79         } else {
   80                 /* devvp is a normal disk device */
   81                 dev = devvp->v_rdev;
   82                 cgbno = fsbtodb(fs, cgtod(fs, cg));
   83         }
   84         if ((u_int)ino >= fs->fs_ipg * fs->fs_ncg)
   85                 panic("ffs_freefile: range: dev = %s, ino = %lu, fs = %s",
   86                     devtoname(dev), (u_long)ino, fs->fs_fsmnt);
   87         if ((error = bread(devvp, cgbno, (int)fs->fs_cgsize, NOCRED, &bp))) {
   88                 brelse(bp);
   89                 return (error);
   90         }
   91         cgp = (struct cg *)bp->b_data;
   92         if (!cg_chkmagic(cgp)) {
   93                 brelse(bp);
   94                 return (0);
   95         }
   96         bp->b_xflags |= BX_BKGRDWRITE;
   97         cgp->cg_unrefs += count;
   98         UFS_LOCK(ump);
   99         fs->fs_unrefs += count;
  100         fs->fs_fmod = 1;
  101         ACTIVECLEAR(fs, cg);
  102         UFS_UNLOCK(ump);
  103         bdwrite(bp);
  104         return (0);
  105 }
  106 
  107 void
  108 ufs_gjournal_orphan(struct vnode *vp)
  109 {
  110         struct inode *ip;
  111 
  112         if (vp->v_mount->mnt_gjprovider == NULL)
  113                 return;
  114         if (vp->v_usecount < 2 || (vp->v_vflag & VV_DELETED))
  115                 return;
  116         ip = VTOI(vp);
  117         if ((vp->v_type == VDIR && ip->i_nlink > 2) ||
  118             (vp->v_type != VDIR && ip->i_nlink > 1)) {
  119                 return;
  120         }
  121         vp->v_vflag |= VV_DELETED;
  122 
  123         ufs_gjournal_modref(vp, 1);
  124 }
  125 
  126 void
  127 ufs_gjournal_close(struct vnode *vp)
  128 {
  129         struct inode *ip;
  130 
  131         if (vp->v_mount->mnt_gjprovider == NULL)
  132                 return;
  133         if (!(vp->v_vflag & VV_DELETED))
  134                 return;
  135         ip = VTOI(vp);
  136         if (ip->i_nlink > 0)
  137                 return;
  138         ufs_gjournal_modref(vp, -1);
  139 }
  140 
  141 #endif /* UFS_GJOURNAL */

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FreeBSD/Linux Kernel Cross Reference sys/ufs/ufs/ufs_gjournal.c

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sys/ufs/ufs/ufs_gjournal.c