fs/xfs/xfs_trans_inode.c

   1 /*
   2  * Copyright (c) 2000,2005 Silicon Graphics, Inc.
   3  * All Rights Reserved.
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License as
   7  * published by the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope that it would be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write the Free Software Foundation,
  16  * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  17  */
  18 #include "xfs.h"
  19 #include "xfs_fs.h"
  20 #include "xfs_shared.h"
  21 #include "xfs_log_format.h"
  22 #include "xfs_trans_resv.h"
  23 #include "xfs_sb.h"
  24 #include "xfs_ag.h"
  25 #include "xfs_mount.h"
  26 #include "xfs_bmap_btree.h"
  27 #include "xfs_alloc_btree.h"
  28 #include "xfs_ialloc_btree.h"
  29 #include "xfs_dinode.h"
  30 #include "xfs_inode.h"
  31 #include "xfs_btree.h"
  32 #include "xfs_trans.h"
  33 #include "xfs_trans_priv.h"
  34 #include "xfs_inode_item.h"
  35 #include "xfs_trace.h"
  36
  37 /*
  38  * Add a locked inode to the transaction.
  39  *
  40  * The inode must be locked, and it cannot be associated with any transaction.
  41  * If lock_flags is non-zero the inode will be unlocked on transaction commit.
  42  */
  43 void
  44 xfs_trans_ijoin(
  45         struct xfs_trans        *tp,
  46         struct xfs_inode        *ip,
  47         uint                    lock_flags)
  48 {
  49         xfs_inode_log_item_t    *iip;
  50
  51         ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
  52         if (ip->i_itemp == NULL)
  53                 xfs_inode_item_init(ip, ip->i_mount);
  54         iip = ip->i_itemp;
  55
  56         ASSERT(iip->ili_lock_flags == 0);
  57         iip->ili_lock_flags = lock_flags;
  58
  59         /*
  60          * Get a log_item_desc to point at the new item.
  61          */
  62         xfs_trans_add_item(tp, &iip->ili_item);
  63 }
  64
  65 /*
  66  * Transactional inode timestamp update. Requires the inode to be locked and
  67  * joined to the transaction supplied. Relies on the transaction subsystem to
  68  * track dirty state and update/writeback the inode accordingly.
  69  */
  70 void
  71 xfs_trans_ichgtime(
  72         struct xfs_trans        *tp,
  73         struct xfs_inode        *ip,
  74         int                     flags)
  75 {
  76         struct inode            *inode = VFS_I(ip);
  77         timespec_t              tv;
  78
  79         ASSERT(tp);
  80         ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
  81
  82         tv = current_fs_time(inode->i_sb);
  83
  84         if ((flags & XFS_ICHGTIME_MOD) &&
  85             !timespec_equal(&inode->i_mtime, &tv)) {
  86                 inode->i_mtime = tv;
  87                 ip->i_d.di_mtime.t_sec = tv.tv_sec;
  88                 ip->i_d.di_mtime.t_nsec = tv.tv_nsec;
  89         }
  90         if ((flags & XFS_ICHGTIME_CHG) &&
  91             !timespec_equal(&inode->i_ctime, &tv)) {
  92                 inode->i_ctime = tv;
  93                 ip->i_d.di_ctime.t_sec = tv.tv_sec;
  94                 ip->i_d.di_ctime.t_nsec = tv.tv_nsec;
  95         }
  96 }
  97
  98 /*
  99  * This is called to mark the fields indicated in fieldmask as needing
 100  * to be logged when the transaction is committed.  The inode must
 101  * already be associated with the given transaction.
 102  *
 103  * The values for fieldmask are defined in xfs_inode_item.h.  We always
 104  * log all of the core inode if any of it has changed, and we always log
 105  * all of the inline data/extents/b-tree root if any of them has changed.
 106  */
 107 void
 108 xfs_trans_log_inode(
 109         xfs_trans_t     *tp,
 110         xfs_inode_t     *ip,
 111         uint            flags)
 112 {
 113         ASSERT(ip->i_itemp != NULL);
 114         ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
 115
 116         /*
 117          * First time we log the inode in a transaction, bump the inode change
 118          * counter if it is configured for this to occur.
 119          */
 120         if (!(ip->i_itemp->ili_item.li_desc->lid_flags & XFS_LID_DIRTY) &&
 121             IS_I_VERSION(VFS_I(ip))) {
 122                 inode_inc_iversion(VFS_I(ip));
 123                 ip->i_d.di_changecount = VFS_I(ip)->i_version;
 124                 flags |= XFS_ILOG_CORE;
 125         }
 126
 127         tp->t_flags |= XFS_TRANS_DIRTY;
 128         ip->i_itemp->ili_item.li_desc->lid_flags |= XFS_LID_DIRTY;
 129
 130         /*
 131          * Always OR in the bits from the ili_last_fields field.
 132          * This is to coordinate with the xfs_iflush() and xfs_iflush_done()
 133          * routines in the eventual clearing of the ili_fields bits.
 134          * See the big comment in xfs_iflush() for an explanation of
 135          * this coordination mechanism.
 136          */
 137         flags |= ip->i_itemp->ili_last_fields;
 138         ip->i_itemp->ili_fields |= flags;
 139 }