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_log.h"
  22 #include "xfs_trans.h"
  23 #include "xfs_sb.h"
  24 #include "xfs_ag.h"
  25 #include "xfs_mount.h"
  26 #include "xfs_bmap_btree.h"
  27 #include "xfs_alloc_btree.h"
  28 #include "xfs_ialloc_btree.h"
  29 #include "xfs_dinode.h"
  30 #include "xfs_inode.h"
  31 #include "xfs_btree.h"
  32 #include "xfs_trans_priv.h"
  33 #include "xfs_inode_item.h"
  34 #include "xfs_trace.h"
  35
  36 #ifdef XFS_TRANS_DEBUG
  37 STATIC void
  38 xfs_trans_inode_broot_debug(
  39         xfs_inode_t     *ip);
  40 #else
  41 #define xfs_trans_inode_broot_debug(ip)
  42 #endif
  43
  44 /*
  45  * Add a locked inode to the transaction.
  46  *
  47  * The inode must be locked, and it cannot be associated with any transaction.
  48  * If lock_flags is non-zero the inode will be unlocked on transaction commit.
  49  */
  50 void
  51 xfs_trans_ijoin(
  52         struct xfs_trans        *tp,
  53         struct xfs_inode        *ip,
  54         uint                    lock_flags)
  55 {
  56         xfs_inode_log_item_t    *iip;
  57
  58         ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
  59         if (ip->i_itemp == NULL)
  60                 xfs_inode_item_init(ip, ip->i_mount);
  61         iip = ip->i_itemp;
  62
  63         ASSERT(iip->ili_lock_flags == 0);
  64         iip->ili_lock_flags = lock_flags;
  65
  66         /*
  67          * Get a log_item_desc to point at the new item.
  68          */
  69         xfs_trans_add_item(tp, &iip->ili_item);
  70
  71         xfs_trans_inode_broot_debug(ip);
  72 }
  73
  74 /*
  75  * Transactional inode timestamp update. Requires the inode to be locked and
  76  * joined to the transaction supplied. Relies on the transaction subsystem to
  77  * track dirty state and update/writeback the inode accordingly.
  78  */
  79 void
  80 xfs_trans_ichgtime(
  81         struct xfs_trans        *tp,
  82         struct xfs_inode        *ip,
  83         int                     flags)
  84 {
  85         struct inode            *inode = VFS_I(ip);
  86         timespec_t              tv;
  87
  88         ASSERT(tp);
  89         ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
  90
  91         tv = current_fs_time(inode->i_sb);
  92
  93         if ((flags & XFS_ICHGTIME_MOD) &&
  94             !timespec_equal(&inode->i_mtime, &tv)) {
  95                 inode->i_mtime = tv;
  96                 ip->i_d.di_mtime.t_sec = tv.tv_sec;
  97                 ip->i_d.di_mtime.t_nsec = tv.tv_nsec;
  98         }
  99         if ((flags & XFS_ICHGTIME_CHG) &&
 100             !timespec_equal(&inode->i_ctime, &tv)) {
 101                 inode->i_ctime = tv;
 102                 ip->i_d.di_ctime.t_sec = tv.tv_sec;
 103                 ip->i_d.di_ctime.t_nsec = tv.tv_nsec;
 104         }
 105 }
 106
 107 /*
 108  * This is called to mark the fields indicated in fieldmask as needing
 109  * to be logged when the transaction is committed.  The inode must
 110  * already be associated with the given transaction.
 111  *
 112  * The values for fieldmask are defined in xfs_inode_item.h.  We always
 113  * log all of the core inode if any of it has changed, and we always log
 114  * all of the inline data/extents/b-tree root if any of them has changed.
 115  */
 116 void
 117 xfs_trans_log_inode(
 118         xfs_trans_t     *tp,
 119         xfs_inode_t     *ip,
 120         uint            flags)
 121 {
 122         ASSERT(ip->i_itemp != NULL);
 123         ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
 124
 125         tp->t_flags |= XFS_TRANS_DIRTY;
 126         ip->i_itemp->ili_item.li_desc->lid_flags |= XFS_LID_DIRTY;
 127
 128         /*
 129          * Always OR in the bits from the ili_last_fields field.
 130          * This is to coordinate with the xfs_iflush() and xfs_iflush_done()
 131          * routines in the eventual clearing of the ili_fields bits.
 132          * See the big comment in xfs_iflush() for an explanation of
 133          * this coordination mechanism.
 134          */
 135         flags |= ip->i_itemp->ili_last_fields;
 136         ip->i_itemp->ili_fields |= flags;
 137 }
 138
 139 #ifdef XFS_TRANS_DEBUG
 140 /*
 141  * Keep track of the state of the inode btree root to make sure we
 142  * log it properly.
 143  */
 144 STATIC void
 145 xfs_trans_inode_broot_debug(
 146         xfs_inode_t     *ip)
 147 {
 148         xfs_inode_log_item_t    *iip;
 149
 150         ASSERT(ip->i_itemp != NULL);
 151         iip = ip->i_itemp;
 152         if (iip->ili_root_size != 0) {
 153                 ASSERT(iip->ili_orig_root != NULL);
 154                 kmem_free(iip->ili_orig_root);
 155                 iip->ili_root_size = 0;
 156                 iip->ili_orig_root = NULL;
 157         }
 158         if (ip->i_d.di_format == XFS_DINODE_FMT_BTREE) {
 159                 ASSERT((ip->i_df.if_broot != NULL) &&
 160                        (ip->i_df.if_broot_bytes > 0));
 161                 iip->ili_root_size = ip->i_df.if_broot_bytes;
 162                 iip->ili_orig_root =
 163                         (char*)kmem_alloc(iip->ili_root_size, KM_SLEEP);
 164                 memcpy(iip->ili_orig_root, (char*)(ip->i_df.if_broot),
 165                       iip->ili_root_size);
 166         }
 167 }
 168 #endif