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