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