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                 ip->i_d.di_mtime.t_sec = tv.tv_sec;
  99                 ip->i_d.di_mtime.t_nsec = tv.tv_nsec;
 100         }
 101         if ((flags & XFS_ICHGTIME_CHG) &&
 102             !timespec_equal(&inode->i_ctime, &tv)) {
 103                 inode->i_ctime = tv;
 104                 ip->i_d.di_ctime.t_sec = tv.tv_sec;
 105                 ip->i_d.di_ctime.t_nsec = tv.tv_nsec;
 106         }
 107 }
 108
 109 /*
 110  * This is called to mark the fields indicated in fieldmask as needing
 111  * to be logged when the transaction is committed.  The inode must
 112  * already be associated with the given transaction.
 113  *
 114  * The values for fieldmask are defined in xfs_inode_item.h.  We always
 115  * log all of the core inode if any of it has changed, and we always log
 116  * all of the inline data/extents/b-tree root if any of them has changed.
 117  */
 118 void
 119 xfs_trans_log_inode(
 120         xfs_trans_t     *tp,
 121         xfs_inode_t     *ip,
 122         uint            flags)
 123 {
 124         ASSERT(ip->i_itemp != NULL);
 125         ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
 126
 127         tp->t_flags |= XFS_TRANS_DIRTY;
 128         ip->i_itemp->ili_item.li_desc->lid_flags |= XFS_LID_DIRTY;
 129
 130         /*
 131          * Always OR in the bits from the ili_last_fields field.
 132          * This is to coordinate with the xfs_iflush() and xfs_iflush_done()
 133          * routines in the eventual clearing of the ili_fields bits.
 134          * See the big comment in xfs_iflush() for an explanation of
 135          * this coordination mechanism.
 136          */
 137         flags |= ip->i_itemp->ili_last_fields;
 138         ip->i_itemp->ili_fields |= flags;
 139 }
 140
 141 #ifdef XFS_TRANS_DEBUG
 142 /*
 143  * Keep track of the state of the inode btree root to make sure we
 144  * log it properly.
 145  */
 146 STATIC void
 147 xfs_trans_inode_broot_debug(
 148         xfs_inode_t     *ip)
 149 {
 150         xfs_inode_log_item_t    *iip;
 151
 152         ASSERT(ip->i_itemp != NULL);
 153         iip = ip->i_itemp;
 154         if (iip->ili_root_size != 0) {
 155                 ASSERT(iip->ili_orig_root != NULL);
 156                 kmem_free(iip->ili_orig_root);
 157                 iip->ili_root_size = 0;
 158                 iip->ili_orig_root = NULL;
 159         }
 160         if (ip->i_d.di_format == XFS_DINODE_FMT_BTREE) {
 161                 ASSERT((ip->i_df.if_broot != NULL) &&
 162                        (ip->i_df.if_broot_bytes > 0));
 163                 iip->ili_root_size = ip->i_df.if_broot_bytes;
 164                 iip->ili_orig_root =
 165                         (char*)kmem_alloc(iip->ili_root_size, KM_SLEEP);
 166                 memcpy(iip->ili_orig_root, (char*)(ip->i_df.if_broot),
 167                       iip->ili_root_size);
 168         }
 169 }
 170 #endif