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  * If lock_flags is non-zero the inode will be unlocked on transaction commit.
  51  */
  52 void
  53 xfs_trans_ijoin(
  54         struct xfs_trans        *tp,
  55         struct xfs_inode        *ip,
  56         uint                    lock_flags)
  57 {
  58         xfs_inode_log_item_t    *iip;
  59
  60         ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
  61         if (ip->i_itemp == NULL)
  62                 xfs_inode_item_init(ip, ip->i_mount);
  63         iip = ip->i_itemp;
  64
  65         ASSERT(iip->ili_lock_flags == 0);
  66         iip->ili_lock_flags = lock_flags;
  67
  68         /*
  69          * Get a log_item_desc to point at the new item.
  70          */
  71         xfs_trans_add_item(tp, &iip->ili_item);
  72
  73         xfs_trans_inode_broot_debug(ip);
  74 }
  75
  76 /*
  77  * Transactional inode timestamp update. Requires the inode to be locked and
  78  * joined to the transaction supplied. Relies on the transaction subsystem to
  79  * track dirty state and update/writeback the inode accordingly.
  80  */
  81 void
  82 xfs_trans_ichgtime(
  83         struct xfs_trans        *tp,
  84         struct xfs_inode        *ip,
  85         int                     flags)
  86 {
  87         struct inode            *inode = VFS_I(ip);
  88         timespec_t              tv;
  89
  90         ASSERT(tp);
  91         ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
  92
  93         tv = current_fs_time(inode->i_sb);
  94
  95         if ((flags & XFS_ICHGTIME_MOD) &&
  96             !timespec_equal(&inode->i_mtime, &tv)) {
  97                 inode->i_mtime = tv;
  98         }
  99         if ((flags & XFS_ICHGTIME_CHG) &&
 100             !timespec_equal(&inode->i_ctime, &tv)) {
 101                 inode->i_ctime = tv;
 102         }
 103 }
 104
 105 /*
 106  * This is called to mark the fields indicated in fieldmask as needing
 107  * to be logged when the transaction is committed.  The inode must
 108  * already be associated with the given transaction.
 109  *
 110  * The values for fieldmask are defined in xfs_inode_item.h.  We always
 111  * log all of the core inode if any of it has changed, and we always log
 112  * all of the inline data/extents/b-tree root if any of them has changed.
 113  */
 114 void
 115 xfs_trans_log_inode(
 116         xfs_trans_t     *tp,
 117         xfs_inode_t     *ip,
 118         uint            flags)
 119 {
 120         ASSERT(ip->i_itemp != NULL);
 121         ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
 122
 123         tp->t_flags |= XFS_TRANS_DIRTY;
 124         ip->i_itemp->ili_item.li_desc->lid_flags |= XFS_LID_DIRTY;
 125
 126         /*
 127          * Always OR in the bits from the ili_last_fields field.
 128          * This is to coordinate with the xfs_iflush() and xfs_iflush_done()
 129          * routines in the eventual clearing of the ilf_fields bits.
 130          * See the big comment in xfs_iflush() for an explanation of
 131          * this coordination mechanism.
 132          */
 133         flags |= ip->i_itemp->ili_last_fields;
 134         ip->i_itemp->ili_format.ilf_fields |= flags;
 135 }
 136
 137 #ifdef XFS_TRANS_DEBUG
 138 /*
 139  * Keep track of the state of the inode btree root to make sure we
 140  * log it properly.
 141  */
 142 STATIC void
 143 xfs_trans_inode_broot_debug(
 144         xfs_inode_t     *ip)
 145 {
 146         xfs_inode_log_item_t    *iip;
 147
 148         ASSERT(ip->i_itemp != NULL);
 149         iip = ip->i_itemp;
 150         if (iip->ili_root_size != 0) {
 151                 ASSERT(iip->ili_orig_root != NULL);
 152                 kmem_free(iip->ili_orig_root);
 153                 iip->ili_root_size = 0;
 154                 iip->ili_orig_root = NULL;
 155         }
 156         if (ip->i_d.di_format == XFS_DINODE_FMT_BTREE) {
 157                 ASSERT((ip->i_df.if_broot != NULL) &&
 158                        (ip->i_df.if_broot_bytes > 0));
 159                 iip->ili_root_size = ip->i_df.if_broot_bytes;
 160                 iip->ili_orig_root =
 161                         (char*)kmem_alloc(iip->ili_root_size, KM_SLEEP);
 162                 memcpy(iip->ili_orig_root, (char*)(ip->i_df.if_broot),
 163                       iip->ili_root_size);
 164         }
 165 }
 166 #endif