ufs_gjournal.c

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    1 /*-
    2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
    3  *
    4  * Copyright (c) 2005-2006 Pawel Jakub Dawidek <pjd@FreeBSD.org>
    5  * 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  *
   16  * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
   17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
   20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   26  * SUCH DAMAGE.
   27  */
   28 
   29 #include <sys/cdefs.h>
   30 __FBSDID("$FreeBSD$");
   31 
   32 #include "opt_ufs.h"
   33 
   34 #include <sys/param.h>
   35 #include <sys/systm.h>
   36 #include <sys/buf.h>
   37 #include <sys/kernel.h>
   38 #include <sys/vnode.h>
   39 #include <sys/lock.h>
   40 #include <sys/mount.h>
   41 #include <sys/mutex.h>
   42 
   43 #include <ufs/ufs/extattr.h>
   44 #include <ufs/ufs/quota.h>
   45 #include <ufs/ufs/inode.h>
   46 #include <ufs/ufs/ufsmount.h>
   47 #include <ufs/ufs/gjournal.h>
   48 
   49 #include <ufs/ffs/fs.h>
   50 #include <ufs/ffs/ffs_extern.h>
   51 
   52 /*
   53  * Change the number of unreferenced inodes.
   54  */
   55 static int
   56 ufs_gjournal_modref(struct vnode *vp, int count)
   57 {
   58         struct cg *cgp;
   59         struct buf *bp;
   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 = VFSTOUFS(vp->v_mount);
   70         fs = ump->um_fs;
   71         devvp = ump->um_devvp;
   72         ino = ip->i_number;
   73 
   74         cg = ino_to_cg(fs, ino);
   75         if (devvp->v_type == VREG) {
   76                 /* devvp is a snapshot */
   77                 dev = VFSTOUFS(devvp->v_mount)->um_devvp->v_rdev;
   78         } else if (devvp->v_type == VCHR) {
   79                 /* devvp is a normal disk device */
   80                 dev = devvp->v_rdev;
   81         } else {
   82                 bp = NULL;
   83                 return (EIO);
   84         }
   85         if ((u_int)ino >= fs->fs_ipg * fs->fs_ncg)
   86                 panic("ufs_gjournal_modref: range: dev = %s, ino = %lu, fs = %s",
   87                     devtoname(dev), (u_long)ino, fs->fs_fsmnt);
   88         if ((error = ffs_getcg(fs, devvp, cg, 0, &bp, &cgp)) != 0)
   89                 return (error);
   90         cgp->cg_unrefs += count;
   91         UFS_LOCK(ump);
   92         fs->fs_unrefs += count;
   93         fs->fs_fmod = 1;
   94         ACTIVECLEAR(fs, cg);
   95         UFS_UNLOCK(ump);
   96         bdwrite(bp);
   97         return (0);
   98 }
   99 
  100 void
  101 ufs_gjournal_orphan(struct vnode *vp)
  102 {
  103         struct inode *ip;
  104 
  105         if (vp->v_mount->mnt_gjprovider == NULL)
  106                 return;
  107         if (vp->v_usecount < 2 || (vp->v_vflag & VV_DELETED))
  108                 return;
  109         ip = VTOI(vp);
  110         if ((vp->v_type == VDIR && ip->i_nlink > 2) ||
  111             (vp->v_type != VDIR && ip->i_nlink > 1)) {
  112                 return;
  113         }
  114         vp->v_vflag |= VV_DELETED;
  115 
  116         ufs_gjournal_modref(vp, 1);
  117 }
  118 
  119 void
  120 ufs_gjournal_close(struct vnode *vp)
  121 {
  122         struct inode *ip;
  123 
  124         if (vp->v_mount->mnt_gjprovider == NULL)
  125                 return;
  126         if (!(vp->v_vflag & VV_DELETED))
  127                 return;
  128         ip = VTOI(vp);
  129         if (ip->i_nlink > 0)
  130                 return;
  131         ufs_gjournal_modref(vp, -1);
  132 }

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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