tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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
39STATIC void
40xfs_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 */
51void
52xfs_trans_ijoin(
53 struct xfs_trans *tp,
54 struct xfs_inode *ip)
55{
56 xfs_inode_log_item_t *iip;
57
58 ASSERT(ip->i_transp == NULL);
59 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
60 if (ip->i_itemp == NULL)
61 xfs_inode_item_init(ip, ip->i_mount);
62 iip = ip->i_itemp;
63 ASSERT(iip->ili_lock_flags == 0);
64
65 /*
66 * Get a log_item_desc to point at the new item.
67 */
68 xfs_trans_add_item(tp, &iip->ili_item);
69
70 xfs_trans_inode_broot_debug(ip);
71
72 /*
73 * Initialize i_transp so we can find it with xfs_inode_incore()
74 * in xfs_trans_iget() above.
75 */
76 ip->i_transp = tp;
77}
78
79/*
80 * Add a locked inode to the transaction.
81 *
82 *
83 * Grabs a reference to the inode which will be dropped when the transaction
84 * is commited. The inode will also be unlocked at that point. The inode
85 * must be locked, and it cannot be associated with any transaction.
86 */
87void
88xfs_trans_ijoin_ref(
89 struct xfs_trans *tp,
90 struct xfs_inode *ip,
91 uint lock_flags)
92{
93 xfs_trans_ijoin(tp, ip);
94 IHOLD(ip);
95 ip->i_itemp->ili_lock_flags = lock_flags;
96}
97
98/*
99 * Transactional inode timestamp update. Requires the inode to be locked and
100 * joined to the transaction supplied. Relies on the transaction subsystem to
101 * track dirty state and update/writeback the inode accordingly.
102 */
103void
104xfs_trans_ichgtime(
105 struct xfs_trans *tp,
106 struct xfs_inode *ip,
107 int flags)
108{
109 struct inode *inode = VFS_I(ip);
110 timespec_t tv;
111
112 ASSERT(tp);
113 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
114 ASSERT(ip->i_transp == tp);
115
116 tv = current_fs_time(inode->i_sb);
117
118 if ((flags & XFS_ICHGTIME_MOD) &&
119 !timespec_equal(&inode->i_mtime, &tv)) {
120 inode->i_mtime = tv;
121 }
122 if ((flags & XFS_ICHGTIME_CHG) &&
123 !timespec_equal(&inode->i_ctime, &tv)) {
124 inode->i_ctime = tv;
125 }
126}
127
128/*
129 * This is called to mark the fields indicated in fieldmask as needing
130 * to be logged when the transaction is committed. The inode must
131 * already be associated with the given transaction.
132 *
133 * The values for fieldmask are defined in xfs_inode_item.h. We always
134 * log all of the core inode if any of it has changed, and we always log
135 * all of the inline data/extents/b-tree root if any of them has changed.
136 */
137void
138xfs_trans_log_inode(
139 xfs_trans_t *tp,
140 xfs_inode_t *ip,
141 uint flags)
142{
143 ASSERT(ip->i_transp == tp);
144 ASSERT(ip->i_itemp != NULL);
145 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
146
147 tp->t_flags |= XFS_TRANS_DIRTY;
148 ip->i_itemp->ili_item.li_desc->lid_flags |= XFS_LID_DIRTY;
149
150 /*
151 * Always OR in the bits from the ili_last_fields field.
152 * This is to coordinate with the xfs_iflush() and xfs_iflush_done()
153 * routines in the eventual clearing of the ilf_fields bits.
154 * See the big comment in xfs_iflush() for an explanation of
155 * this coordination mechanism.
156 */
157 flags |= ip->i_itemp->ili_last_fields;
158 ip->i_itemp->ili_format.ilf_fields |= flags;
159}
160
161#ifdef XFS_TRANS_DEBUG
162/*
163 * Keep track of the state of the inode btree root to make sure we
164 * log it properly.
165 */
166STATIC void
167xfs_trans_inode_broot_debug(
168 xfs_inode_t *ip)
169{
170 xfs_inode_log_item_t *iip;
171
172 ASSERT(ip->i_itemp != NULL);
173 iip = ip->i_itemp;
174 if (iip->ili_root_size != 0) {
175 ASSERT(iip->ili_orig_root != NULL);
176 kmem_free(iip->ili_orig_root);
177 iip->ili_root_size = 0;
178 iip->ili_orig_root = NULL;
179 }
180 if (ip->i_d.di_format == XFS_DINODE_FMT_BTREE) {
181 ASSERT((ip->i_df.if_broot != NULL) &&
182 (ip->i_df.if_broot_bytes > 0));
183 iip->ili_root_size = ip->i_df.if_broot_bytes;
184 iip->ili_orig_root =
185 (char*)kmem_alloc(iip->ili_root_size, KM_SLEEP);
186 memcpy(iip->ili_orig_root, (char*)(ip->i_df.if_broot),
187 iip->ili_root_size);
188 }
189}
190#endif