xfs_trans_inode.c 4.2 KB

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  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_shared.h"
  21. #include "xfs_format.h"
  22. #include "xfs_log_format.h"
  23. #include "xfs_trans_resv.h"
  24. #include "xfs_mount.h"
  25. #include "xfs_inode.h"
  26. #include "xfs_trans.h"
  27. #include "xfs_trans_priv.h"
  28. #include "xfs_inode_item.h"
  29. #include "xfs_trace.h"
  30. /*
  31. * Add a locked inode to the transaction.
  32. *
  33. * The inode must be locked, and it cannot be associated with any transaction.
  34. * If lock_flags is non-zero the inode will be unlocked on transaction commit.
  35. */
  36. void
  37. xfs_trans_ijoin(
  38. struct xfs_trans *tp,
  39. struct xfs_inode *ip,
  40. uint lock_flags)
  41. {
  42. xfs_inode_log_item_t *iip;
  43. ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
  44. if (ip->i_itemp == NULL)
  45. xfs_inode_item_init(ip, ip->i_mount);
  46. iip = ip->i_itemp;
  47. ASSERT(iip->ili_lock_flags == 0);
  48. iip->ili_lock_flags = lock_flags;
  49. /*
  50. * Get a log_item_desc to point at the new item.
  51. */
  52. xfs_trans_add_item(tp, &iip->ili_item);
  53. }
  54. /*
  55. * Transactional inode timestamp update. Requires the inode to be locked and
  56. * joined to the transaction supplied. Relies on the transaction subsystem to
  57. * track dirty state and update/writeback the inode accordingly.
  58. */
  59. void
  60. xfs_trans_ichgtime(
  61. struct xfs_trans *tp,
  62. struct xfs_inode *ip,
  63. int flags)
  64. {
  65. struct inode *inode = VFS_I(ip);
  66. struct timespec tv;
  67. ASSERT(tp);
  68. ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
  69. tv = current_fs_time(inode->i_sb);
  70. if ((flags & XFS_ICHGTIME_MOD) &&
  71. !timespec_equal(&inode->i_mtime, &tv)) {
  72. inode->i_mtime = tv;
  73. ip->i_d.di_mtime.t_sec = tv.tv_sec;
  74. ip->i_d.di_mtime.t_nsec = tv.tv_nsec;
  75. }
  76. if ((flags & XFS_ICHGTIME_CHG) &&
  77. !timespec_equal(&inode->i_ctime, &tv)) {
  78. inode->i_ctime = tv;
  79. ip->i_d.di_ctime.t_sec = tv.tv_sec;
  80. ip->i_d.di_ctime.t_nsec = tv.tv_nsec;
  81. }
  82. }
  83. /*
  84. * This is called to mark the fields indicated in fieldmask as needing
  85. * to be logged when the transaction is committed. The inode must
  86. * already be associated with the given transaction.
  87. *
  88. * The values for fieldmask are defined in xfs_inode_item.h. We always
  89. * log all of the core inode if any of it has changed, and we always log
  90. * all of the inline data/extents/b-tree root if any of them has changed.
  91. */
  92. void
  93. xfs_trans_log_inode(
  94. xfs_trans_t *tp,
  95. xfs_inode_t *ip,
  96. uint flags)
  97. {
  98. ASSERT(ip->i_itemp != NULL);
  99. ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
  100. /*
  101. * Record the specific change for fdatasync optimisation. This
  102. * allows fdatasync to skip log forces for inodes that are only
  103. * timestamp dirty. We do this before the change count so that
  104. * the core being logged in this case does not impact on fdatasync
  105. * behaviour.
  106. */
  107. ip->i_itemp->ili_fsync_fields |= flags;
  108. /*
  109. * First time we log the inode in a transaction, bump the inode change
  110. * counter if it is configured for this to occur. We don't use
  111. * inode_inc_version() because there is no need for extra locking around
  112. * i_version as we already hold the inode locked exclusively for
  113. * metadata modification.
  114. */
  115. if (!(ip->i_itemp->ili_item.li_desc->lid_flags & XFS_LID_DIRTY) &&
  116. IS_I_VERSION(VFS_I(ip))) {
  117. ip->i_d.di_changecount = ++VFS_I(ip)->i_version;
  118. flags |= XFS_ILOG_CORE;
  119. }
  120. tp->t_flags |= XFS_TRANS_DIRTY;
  121. ip->i_itemp->ili_item.li_desc->lid_flags |= XFS_LID_DIRTY;
  122. /*
  123. * Always OR in the bits from the ili_last_fields field.
  124. * This is to coordinate with the xfs_iflush() and xfs_iflush_done()
  125. * routines in the eventual clearing of the ili_fields bits.
  126. * See the big comment in xfs_iflush() for an explanation of
  127. * this coordination mechanism.
  128. */
  129. flags |= ip->i_itemp->ili_last_fields;
  130. ip->i_itemp->ili_fields |= flags;
  131. }