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
  37 #ifdef XFS_TRANS_DEBUG
  38 STATIC void
  39 xfs_trans_inode_broot_debug(
  40         xfs_inode_t     *ip);
  41 #else
  42 #define xfs_trans_inode_broot_debug(ip)
  43 #endif
  44
  45
  46 /*
  47  * Get an inode and join it to the transaction.
  48  */
  49 int
  50 xfs_trans_iget(
  51         xfs_mount_t     *mp,
  52         xfs_trans_t     *tp,
  53         xfs_ino_t       ino,
  54         uint            flags,
  55         uint            lock_flags,
  56         xfs_inode_t     **ipp)
  57 {
  58         int                     error;
  59
  60         error = xfs_iget(mp, tp, ino, flags, lock_flags, ipp);
  61         if (!error && tp)
  62                 xfs_trans_ijoin(tp, *ipp, lock_flags);
  63         return error;
  64 }
  65
  66 /*
  67  * Add the locked inode to the transaction.
  68  * The inode must be locked, and it cannot be associated with any
  69  * transaction.  The caller must specify the locks already held
  70  * on the inode.
  71  */
  72 void
  73 xfs_trans_ijoin(
  74         xfs_trans_t     *tp,
  75         xfs_inode_t     *ip,
  76         uint            lock_flags)
  77 {
  78         xfs_inode_log_item_t    *iip;
  79
  80         ASSERT(ip->i_transp == NULL);
  81         ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
  82         ASSERT(lock_flags & XFS_ILOCK_EXCL);
  83         if (ip->i_itemp == NULL)
  84                 xfs_inode_item_init(ip, ip->i_mount);
  85         iip = ip->i_itemp;
  86         ASSERT(iip->ili_flags == 0);
  87
  88         /*
  89          * Get a log_item_desc to point at the new item.
  90          */
  91         xfs_trans_add_item(tp, &iip->ili_item);
  92
  93         xfs_trans_inode_broot_debug(ip);
  94
  95         /*
  96          * If the IO lock is already held, mark that in the inode log item.
  97          */
  98         if (lock_flags & XFS_IOLOCK_EXCL) {
  99                 iip->ili_flags |= XFS_ILI_IOLOCKED_EXCL;
 100         } else if (lock_flags & XFS_IOLOCK_SHARED) {
 101                 iip->ili_flags |= XFS_ILI_IOLOCKED_SHARED;
 102         }
 103
 104         /*
 105          * Initialize i_transp so we can find it with xfs_inode_incore()
 106          * in xfs_trans_iget() above.
 107          */
 108         ip->i_transp = tp;
 109 }
 110
 111
 112
 113 /*
 114  * Mark the inode as not needing to be unlocked when the inode item's
 115  * IOP_UNLOCK() routine is called.  The inode must already be locked
 116  * and associated with the given transaction.
 117  */
 118 /*ARGSUSED*/
 119 void
 120 xfs_trans_ihold(
 121         xfs_trans_t     *tp,
 122         xfs_inode_t     *ip)
 123 {
 124         ASSERT(ip->i_transp == tp);
 125         ASSERT(ip->i_itemp != NULL);
 126         ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
 127
 128         ip->i_itemp->ili_flags |= XFS_ILI_HOLD;
 129 }
 130
 131
 132 /*
 133  * This is called to mark the fields indicated in fieldmask as needing
 134  * to be logged when the transaction is committed.  The inode must
 135  * already be associated with the given transaction.
 136  *
 137  * The values for fieldmask are defined in xfs_inode_item.h.  We always
 138  * log all of the core inode if any of it has changed, and we always log
 139  * all of the inline data/extents/b-tree root if any of them has changed.
 140  */
 141 void
 142 xfs_trans_log_inode(
 143         xfs_trans_t     *tp,
 144         xfs_inode_t     *ip,
 145         uint            flags)
 146 {
 147         ASSERT(ip->i_transp == tp);
 148         ASSERT(ip->i_itemp != NULL);
 149         ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
 150
 151         tp->t_flags |= XFS_TRANS_DIRTY;
 152         ip->i_itemp->ili_item.li_desc->lid_flags |= XFS_LID_DIRTY;
 153
 154         /*
 155          * Always OR in the bits from the ili_last_fields field.
 156          * This is to coordinate with the xfs_iflush() and xfs_iflush_done()
 157          * routines in the eventual clearing of the ilf_fields bits.
 158          * See the big comment in xfs_iflush() for an explanation of
 159          * this coordination mechanism.
 160          */
 161         flags |= ip->i_itemp->ili_last_fields;
 162         ip->i_itemp->ili_format.ilf_fields |= flags;
 163 }
 164
 165 #ifdef XFS_TRANS_DEBUG
 166 /*
 167  * Keep track of the state of the inode btree root to make sure we
 168  * log it properly.
 169  */
 170 STATIC void
 171 xfs_trans_inode_broot_debug(
 172         xfs_inode_t     *ip)
 173 {
 174         xfs_inode_log_item_t    *iip;
 175
 176         ASSERT(ip->i_itemp != NULL);
 177         iip = ip->i_itemp;
 178         if (iip->ili_root_size != 0) {
 179                 ASSERT(iip->ili_orig_root != NULL);
 180                 kmem_free(iip->ili_orig_root);
 181                 iip->ili_root_size = 0;
 182                 iip->ili_orig_root = NULL;
 183         }
 184         if (ip->i_d.di_format == XFS_DINODE_FMT_BTREE) {
 185                 ASSERT((ip->i_df.if_broot != NULL) &&
 186                        (ip->i_df.if_broot_bytes > 0));
 187                 iip->ili_root_size = ip->i_df.if_broot_bytes;
 188                 iip->ili_orig_root =
 189                         (char*)kmem_alloc(iip->ili_root_size, KM_SLEEP);
 190                 memcpy(iip->ili_orig_root, (char*)(ip->i_df.if_broot),
 191                       iip->ili_root_size);
 192         }
 193 }
 194 #endif