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 xfs_inode_log_item_t *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.t_sec = (int32_t)tv.tv_sec; 71 ip->i_d.di_crtime.t_nsec = (int32_t)tv.tv_nsec; 72 } 73 } 74 75 /* 76 * This is called to mark the fields indicated in fieldmask as needing 77 * to be logged when the transaction is committed. The inode must 78 * already be associated with the given transaction. 79 * 80 * The values for fieldmask are defined in xfs_inode_item.h. We always 81 * log all of the core inode if any of it has changed, and we always log 82 * all of the inline data/extents/b-tree root if any of them has changed. 83 */ 84 void 85 xfs_trans_log_inode( 86 xfs_trans_t *tp, 87 xfs_inode_t *ip, 88 uint flags) 89 { 90 struct inode *inode = VFS_I(ip); 91 92 ASSERT(ip->i_itemp != NULL); 93 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); 94 95 /* 96 * Don't bother with i_lock for the I_DIRTY_TIME check here, as races 97 * don't matter - we either will need an extra transaction in 24 hours 98 * to log the timestamps, or will clear already cleared fields in the 99 * worst case. 100 */ 101 if (inode->i_state & (I_DIRTY_TIME | I_DIRTY_TIME_EXPIRED)) { 102 spin_lock(&inode->i_lock); 103 inode->i_state &= ~(I_DIRTY_TIME | I_DIRTY_TIME_EXPIRED); 104 spin_unlock(&inode->i_lock); 105 } 106 107 /* 108 * Record the specific change for fdatasync optimisation. This 109 * allows fdatasync to skip log forces for inodes that are only 110 * timestamp dirty. We do this before the change count so that 111 * the core being logged in this case does not impact on fdatasync 112 * behaviour. 113 */ 114 ip->i_itemp->ili_fsync_fields |= flags; 115 116 /* 117 * First time we log the inode in a transaction, bump the inode change 118 * counter if it is configured for this to occur. While we have the 119 * inode locked exclusively for metadata modification, we can usually 120 * avoid setting XFS_ILOG_CORE if no one has queried the value since 121 * the last time it was incremented. If we have XFS_ILOG_CORE already 122 * set however, then go ahead and bump the i_version counter 123 * unconditionally. 124 */ 125 if (!test_and_set_bit(XFS_LI_DIRTY, &ip->i_itemp->ili_item.li_flags) && 126 IS_I_VERSION(VFS_I(ip))) { 127 if (inode_maybe_inc_iversion(VFS_I(ip), flags & XFS_ILOG_CORE)) 128 flags |= XFS_ILOG_CORE; 129 } 130 131 tp->t_flags |= XFS_TRANS_DIRTY; 132 133 /* 134 * Always OR in the bits from the ili_last_fields field. 135 * This is to coordinate with the xfs_iflush() and xfs_iflush_done() 136 * routines in the eventual clearing of the ili_fields bits. 137 * See the big comment in xfs_iflush() for an explanation of 138 * this coordination mechanism. 139 */ 140 flags |= ip->i_itemp->ili_last_fields; 141 ip->i_itemp->ili_fields |= flags; 142 } 143 144 int 145 xfs_trans_roll_inode( 146 struct xfs_trans **tpp, 147 struct xfs_inode *ip) 148 { 149 int error; 150 151 xfs_trans_log_inode(*tpp, ip, XFS_ILOG_CORE); 152 error = xfs_trans_roll(tpp); 153 if (!error) 154 xfs_trans_ijoin(*tpp, ip, 0); 155 return error; 156 } 157