1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Copyright (c) 2000,2005 Silicon Graphics, Inc. 4 * All Rights Reserved. 5 */ 6 #include "xfs.h" 7 #include "xfs_fs.h" 8 #include "xfs_shared.h" 9 #include "xfs_format.h" 10 #include "xfs_log_format.h" 11 #include "xfs_inode.h" 12 #include "xfs_trans.h" 13 #include "xfs_trans_priv.h" 14 #include "xfs_inode_item.h" 15 16 #include <linux/iversion.h> 17 18 /* 19 * Add a locked inode to the transaction. 20 * 21 * The inode must be locked, and it cannot be associated with any transaction. 22 * If lock_flags is non-zero the inode will be unlocked on transaction commit. 23 */ 24 void 25 xfs_trans_ijoin( 26 struct xfs_trans *tp, 27 struct xfs_inode *ip, 28 uint lock_flags) 29 { 30 struct xfs_inode_log_item *iip; 31 32 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); 33 if (ip->i_itemp == NULL) 34 xfs_inode_item_init(ip, ip->i_mount); 35 iip = ip->i_itemp; 36 37 ASSERT(iip->ili_lock_flags == 0); 38 iip->ili_lock_flags = lock_flags; 39 40 /* 41 * Get a log_item_desc to point at the new item. 42 */ 43 xfs_trans_add_item(tp, &iip->ili_item); 44 } 45 46 /* 47 * Transactional inode timestamp update. Requires the inode to be locked and 48 * joined to the transaction supplied. Relies on the transaction subsystem to 49 * track dirty state and update/writeback the inode accordingly. 50 */ 51 void 52 xfs_trans_ichgtime( 53 struct xfs_trans *tp, 54 struct xfs_inode *ip, 55 int flags) 56 { 57 struct inode *inode = VFS_I(ip); 58 struct timespec64 tv; 59 60 ASSERT(tp); 61 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); 62 63 tv = current_time(inode); 64 65 if (flags & XFS_ICHGTIME_MOD) 66 inode->i_mtime = tv; 67 if (flags & XFS_ICHGTIME_CHG) 68 inode->i_ctime = tv; 69 if (flags & XFS_ICHGTIME_CREATE) 70 ip->i_d.di_crtime = tv; 71 } 72 73 /* 74 * This is called to mark the fields indicated in fieldmask as needing 75 * to be logged when the transaction is committed. The inode must 76 * already be associated with the given transaction. 77 * 78 * The values for fieldmask are defined in xfs_inode_item.h. We always 79 * log all of the core inode if any of it has changed, and we always log 80 * all of the inline data/extents/b-tree root if any of them has changed. 81 */ 82 void 83 xfs_trans_log_inode( 84 xfs_trans_t *tp, 85 xfs_inode_t *ip, 86 uint flags) 87 { 88 struct inode *inode = VFS_I(ip); 89 90 ASSERT(ip->i_itemp != NULL); 91 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); 92 93 /* 94 * Don't bother with i_lock for the I_DIRTY_TIME check here, as races 95 * don't matter - we either will need an extra transaction in 24 hours 96 * to log the timestamps, or will clear already cleared fields in the 97 * worst case. 98 */ 99 if (inode->i_state & (I_DIRTY_TIME | I_DIRTY_TIME_EXPIRED)) { 100 spin_lock(&inode->i_lock); 101 inode->i_state &= ~(I_DIRTY_TIME | I_DIRTY_TIME_EXPIRED); 102 spin_unlock(&inode->i_lock); 103 } 104 105 /* 106 * Record the specific change for fdatasync optimisation. This 107 * allows fdatasync to skip log forces for inodes that are only 108 * timestamp dirty. We do this before the change count so that 109 * the core being logged in this case does not impact on fdatasync 110 * behaviour. 111 */ 112 ip->i_itemp->ili_fsync_fields |= flags; 113 114 /* 115 * First time we log the inode in a transaction, bump the inode change 116 * counter if it is configured for this to occur. While we have the 117 * inode locked exclusively for metadata modification, we can usually 118 * avoid setting XFS_ILOG_CORE if no one has queried the value since 119 * the last time it was incremented. If we have XFS_ILOG_CORE already 120 * set however, then go ahead and bump the i_version counter 121 * unconditionally. 122 */ 123 if (!test_and_set_bit(XFS_LI_DIRTY, &ip->i_itemp->ili_item.li_flags) && 124 IS_I_VERSION(VFS_I(ip))) { 125 if (inode_maybe_inc_iversion(VFS_I(ip), flags & XFS_ILOG_CORE)) 126 flags |= XFS_ILOG_CORE; 127 } 128 129 tp->t_flags |= XFS_TRANS_DIRTY; 130 131 /* 132 * Always OR in the bits from the ili_last_fields field. 133 * This is to coordinate with the xfs_iflush() and xfs_iflush_done() 134 * routines in the eventual clearing of the ili_fields bits. 135 * See the big comment in xfs_iflush() for an explanation of 136 * this coordination mechanism. 137 */ 138 flags |= ip->i_itemp->ili_last_fields; 139 ip->i_itemp->ili_fields |= flags; 140 } 141 142 int 143 xfs_trans_roll_inode( 144 struct xfs_trans **tpp, 145 struct xfs_inode *ip) 146 { 147 int error; 148 149 xfs_trans_log_inode(*tpp, ip, XFS_ILOG_CORE); 150 error = xfs_trans_roll(tpp); 151 if (!error) 152 xfs_trans_ijoin(*tpp, ip, 0); 153 return error; 154 } 155