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_dir2.h"
  28 #include "xfs_dmapi.h"
  29 #include "xfs_mount.h"
  30 #include "xfs_bmap_btree.h"
  31 #include "xfs_alloc_btree.h"
  32 #include "xfs_ialloc_btree.h"
  33 #include "xfs_dir2_sf.h"
  34 #include "xfs_attr_sf.h"
  35 #include "xfs_dinode.h"
  36 #include "xfs_inode.h"
  37 #include "xfs_btree.h"
  38 #include "xfs_ialloc.h"
  39 #include "xfs_trans_priv.h"
  40 #include "xfs_inode_item.h"
  41
  42 #ifdef XFS_TRANS_DEBUG
  43 STATIC void
  44 xfs_trans_inode_broot_debug(
  45         xfs_inode_t     *ip);
  46 #else
  47 #define xfs_trans_inode_broot_debug(ip)
  48 #endif
  49
  50
  51 /*
  52  * Get an inode and join it to the transaction.
  53  */
  54 int
  55 xfs_trans_iget(
  56         xfs_mount_t     *mp,
  57         xfs_trans_t     *tp,
  58         xfs_ino_t       ino,
  59         uint            flags,
  60         uint            lock_flags,
  61         xfs_inode_t     **ipp)
  62 {
  63         int                     error;
  64
  65         error = xfs_iget(mp, tp, ino, flags, lock_flags, ipp, 0);
  66         if (!error && tp)
  67                 xfs_trans_ijoin(tp, *ipp, lock_flags);
  68         return error;
  69 }
  70
  71 /*
  72  * Add the locked inode to the transaction.
  73  * The inode must be locked, and it cannot be associated with any
  74  * transaction.  The caller must specify the locks already held
  75  * on the inode.
  76  */
  77 void
  78 xfs_trans_ijoin(
  79         xfs_trans_t     *tp,
  80         xfs_inode_t     *ip,
  81         uint            lock_flags)
  82 {
  83         xfs_inode_log_item_t    *iip;
  84
  85         ASSERT(ip->i_transp == NULL);
  86         ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
  87         ASSERT(lock_flags & XFS_ILOCK_EXCL);
  88         if (ip->i_itemp == NULL)
  89                 xfs_inode_item_init(ip, ip->i_mount);
  90         iip = ip->i_itemp;
  91         ASSERT(iip->ili_flags == 0);
  92
  93         /*
  94          * Get a log_item_desc to point at the new item.
  95          */
  96         (void) xfs_trans_add_item(tp, (xfs_log_item_t*)(iip));
  97
  98         xfs_trans_inode_broot_debug(ip);
  99
 100         /*
 101          * If the IO lock is already held, mark that in the inode log item.
 102          */
 103         if (lock_flags & XFS_IOLOCK_EXCL) {
 104                 iip->ili_flags |= XFS_ILI_IOLOCKED_EXCL;
 105         } else if (lock_flags & XFS_IOLOCK_SHARED) {
 106                 iip->ili_flags |= XFS_ILI_IOLOCKED_SHARED;
 107         }
 108
 109         /*
 110          * Initialize i_transp so we can find it with xfs_inode_incore()
 111          * in xfs_trans_iget() above.
 112          */
 113         ip->i_transp = tp;
 114 }
 115
 116
 117
 118 /*
 119  * Mark the inode as not needing to be unlocked when the inode item's
 120  * IOP_UNLOCK() routine is called.  The inode must already be locked
 121  * and associated with the given transaction.
 122  */
 123 /*ARGSUSED*/
 124 void
 125 xfs_trans_ihold(
 126         xfs_trans_t     *tp,
 127         xfs_inode_t     *ip)
 128 {
 129         ASSERT(ip->i_transp == tp);
 130         ASSERT(ip->i_itemp != NULL);
 131         ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
 132
 133         ip->i_itemp->ili_flags |= XFS_ILI_HOLD;
 134 }
 135
 136
 137 /*
 138  * This is called to mark the fields indicated in fieldmask as needing
 139  * to be logged when the transaction is committed.  The inode must
 140  * already be associated with the given transaction.
 141  *
 142  * The values for fieldmask are defined in xfs_inode_item.h.  We always
 143  * log all of the core inode if any of it has changed, and we always log
 144  * all of the inline data/extents/b-tree root if any of them has changed.
 145  */
 146 void
 147 xfs_trans_log_inode(
 148         xfs_trans_t     *tp,
 149         xfs_inode_t     *ip,
 150         uint            flags)
 151 {
 152         xfs_log_item_desc_t     *lidp;
 153
 154         ASSERT(ip->i_transp == tp);
 155         ASSERT(ip->i_itemp != NULL);
 156         ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
 157
 158         lidp = xfs_trans_find_item(tp, (xfs_log_item_t*)(ip->i_itemp));
 159         ASSERT(lidp != NULL);
 160
 161         tp->t_flags |= XFS_TRANS_DIRTY;
 162         lidp->lid_flags |= XFS_LID_DIRTY;
 163
 164         /*
 165          * Always OR in the bits from the ili_last_fields field.
 166          * This is to coordinate with the xfs_iflush() and xfs_iflush_done()
 167          * routines in the eventual clearing of the ilf_fields bits.
 168          * See the big comment in xfs_iflush() for an explanation of
 169          * this coordination mechanism.
 170          */
 171         flags |= ip->i_itemp->ili_last_fields;
 172         ip->i_itemp->ili_format.ilf_fields |= flags;
 173 }
 174
 175 #ifdef XFS_TRANS_DEBUG
 176 /*
 177  * Keep track of the state of the inode btree root to make sure we
 178  * log it properly.
 179  */
 180 STATIC void
 181 xfs_trans_inode_broot_debug(
 182         xfs_inode_t     *ip)
 183 {
 184         xfs_inode_log_item_t    *iip;
 185
 186         ASSERT(ip->i_itemp != NULL);
 187         iip = ip->i_itemp;
 188         if (iip->ili_root_size != 0) {
 189                 ASSERT(iip->ili_orig_root != NULL);
 190                 kmem_free(iip->ili_orig_root);
 191                 iip->ili_root_size = 0;
 192                 iip->ili_orig_root = NULL;
 193         }
 194         if (ip->i_d.di_format == XFS_DINODE_FMT_BTREE) {
 195                 ASSERT((ip->i_df.if_broot != NULL) &&
 196                        (ip->i_df.if_broot_bytes > 0));
 197                 iip->ili_root_size = ip->i_df.if_broot_bytes;
 198                 iip->ili_orig_root =
 199                         (char*)kmem_alloc(iip->ili_root_size, KM_SLEEP);
 200                 memcpy(iip->ili_orig_root, (char*)(ip->i_df.if_broot),
 201                       iip->ili_root_size);
 202         }
 203 }
 204 #endif