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_types.h"
  21 #include "xfs_bit.h"
  22 #include "xfs_log.h"
  23 #include "xfs_inum.h"
  24 #include "xfs_trans.h"
  25 #include "xfs_sb.h"
  26 #include "xfs_ag.h"
  27 #include "xfs_mount.h"
  28 #include "xfs_bmap_btree.h"
  29 #include "xfs_alloc_btree.h"
  30 #include "xfs_ialloc_btree.h"
  31 #include "xfs_dinode.h"
  32 #include "xfs_inode.h"
  33 #include "xfs_btree.h"
  34 #include "xfs_trans_priv.h"
  35 #include "xfs_inode_item.h"
  36 #include "xfs_trace.h"
  37
  38 #ifdef XFS_TRANS_DEBUG
  39 STATIC void
  40 xfs_trans_inode_broot_debug(
  41         xfs_inode_t     *ip);
  42 #else
  43 #define xfs_trans_inode_broot_debug(ip)
  44 #endif
  45
  46 /*
  47  * Add a locked inode to the transaction.
  48  *
  49  * The inode must be locked, and it cannot be associated with any transaction.
  50  */
  51 void
  52 xfs_trans_ijoin(
  53         struct xfs_trans        *tp,
  54         struct xfs_inode        *ip)
  55 {
  56         xfs_inode_log_item_t    *iip;
  57
  58         ASSERT(ip->i_transp == NULL);
  59         ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
  60         if (ip->i_itemp == NULL)
  61                 xfs_inode_item_init(ip, ip->i_mount);
  62         iip = ip->i_itemp;
  63         ASSERT(iip->ili_lock_flags == 0);
  64
  65         /*
  66          * Get a log_item_desc to point at the new item.
  67          */
  68         xfs_trans_add_item(tp, &iip->ili_item);
  69
  70         xfs_trans_inode_broot_debug(ip);
  71
  72         /*
  73          * Initialize i_transp so we can find it with xfs_inode_incore()
  74          * in xfs_trans_iget() above.
  75          */
  76         ip->i_transp = tp;
  77 }
  78
  79 /*
  80  * Add a locked inode to the transaction.
  81  *
  82  *
  83  * Grabs a reference to the inode which will be dropped when the transaction
  84  * is committed.  The inode will also be unlocked at that point.  The inode
  85  * must be locked, and it cannot be associated with any transaction.
  86  */
  87 void
  88 xfs_trans_ijoin_ref(
  89         struct xfs_trans        *tp,
  90         struct xfs_inode        *ip,
  91         uint                    lock_flags)
  92 {
  93         xfs_trans_ijoin(tp, ip);
  94         IHOLD(ip);
  95         ip->i_itemp->ili_lock_flags = lock_flags;
  96 }
  97
  98 /*
  99  * Transactional inode timestamp update. Requires the inode to be locked and
 100  * joined to the transaction supplied. Relies on the transaction subsystem to
 101  * track dirty state and update/writeback the inode accordingly.
 102  */
 103 void
 104 xfs_trans_ichgtime(
 105         struct xfs_trans        *tp,
 106         struct xfs_inode        *ip,
 107         int                     flags)
 108 {
 109         struct inode            *inode = VFS_I(ip);
 110         timespec_t              tv;
 111
 112         ASSERT(tp);
 113         ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
 114         ASSERT(ip->i_transp == tp);
 115
 116         tv = current_fs_time(inode->i_sb);
 117
 118         if ((flags & XFS_ICHGTIME_MOD) &&
 119             !timespec_equal(&inode->i_mtime, &tv)) {
 120                 inode->i_mtime = tv;
 121         }
 122         if ((flags & XFS_ICHGTIME_CHG) &&
 123             !timespec_equal(&inode->i_ctime, &tv)) {
 124                 inode->i_ctime = tv;
 125         }
 126 }
 127
 128 /*
 129  * This is called to mark the fields indicated in fieldmask as needing
 130  * to be logged when the transaction is committed.  The inode must
 131  * already be associated with the given transaction.
 132  *
 133  * The values for fieldmask are defined in xfs_inode_item.h.  We always
 134  * log all of the core inode if any of it has changed, and we always log
 135  * all of the inline data/extents/b-tree root if any of them has changed.
 136  */
 137 void
 138 xfs_trans_log_inode(
 139         xfs_trans_t     *tp,
 140         xfs_inode_t     *ip,
 141         uint            flags)
 142 {
 143         ASSERT(ip->i_transp == tp);
 144         ASSERT(ip->i_itemp != NULL);
 145         ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
 146
 147         tp->t_flags |= XFS_TRANS_DIRTY;
 148         ip->i_itemp->ili_item.li_desc->lid_flags |= XFS_LID_DIRTY;
 149
 150         /*
 151          * Always OR in the bits from the ili_last_fields field.
 152          * This is to coordinate with the xfs_iflush() and xfs_iflush_done()
 153          * routines in the eventual clearing of the ilf_fields bits.
 154          * See the big comment in xfs_iflush() for an explanation of
 155          * this coordination mechanism.
 156          */
 157         flags |= ip->i_itemp->ili_last_fields;
 158         ip->i_itemp->ili_format.ilf_fields |= flags;
 159 }
 160
 161 #ifdef XFS_TRANS_DEBUG
 162 /*
 163  * Keep track of the state of the inode btree root to make sure we
 164  * log it properly.
 165  */
 166 STATIC void
 167 xfs_trans_inode_broot_debug(
 168         xfs_inode_t     *ip)
 169 {
 170         xfs_inode_log_item_t    *iip;
 171
 172         ASSERT(ip->i_itemp != NULL);
 173         iip = ip->i_itemp;
 174         if (iip->ili_root_size != 0) {
 175                 ASSERT(iip->ili_orig_root != NULL);
 176                 kmem_free(iip->ili_orig_root);
 177                 iip->ili_root_size = 0;
 178                 iip->ili_orig_root = NULL;
 179         }
 180         if (ip->i_d.di_format == XFS_DINODE_FMT_BTREE) {
 181                 ASSERT((ip->i_df.if_broot != NULL) &&
 182                        (ip->i_df.if_broot_bytes > 0));
 183                 iip->ili_root_size = ip->i_df.if_broot_bytes;
 184                 iip->ili_orig_root =
 185                         (char*)kmem_alloc(iip->ili_root_size, KM_SLEEP);
 186                 memcpy(iip->ili_orig_root, (char*)(ip->i_df.if_broot),
 187                       iip->ili_root_size);
 188         }
 189 }
 190 #endif