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