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