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_dir2.h"
28#include "xfs_dmapi.h"
29#include "xfs_mount.h"
30#include "xfs_bmap_btree.h"
31#include "xfs_alloc_btree.h"
32#include "xfs_ialloc_btree.h"
33#include "xfs_dir2_sf.h"
34#include "xfs_attr_sf.h"
35#include "xfs_dinode.h"
36#include "xfs_inode.h"
37#include "xfs_btree.h"
38#include "xfs_ialloc.h"
39#include "xfs_trans_priv.h"
40#include "xfs_inode_item.h"
41
42#ifdef XFS_TRANS_DEBUG
43STATIC void
44xfs_trans_inode_broot_debug(
45 xfs_inode_t *ip);
46#else
47#define xfs_trans_inode_broot_debug(ip)
48#endif
49
50
51/*
52 * Get an inode and join it to the transaction.
53 */
54int
55xfs_trans_iget(
56 xfs_mount_t *mp,
57 xfs_trans_t *tp,
58 xfs_ino_t ino,
59 uint flags,
60 uint lock_flags,
61 xfs_inode_t **ipp)
62{
63 int error;
64
65 error = xfs_iget(mp, tp, ino, flags, lock_flags, ipp);
66 if (!error && tp)
67 xfs_trans_ijoin(tp, *ipp, lock_flags);
68 return error;
69}
70
71/*
72 * Add the locked inode to the transaction.
73 * The inode must be locked, and it cannot be associated with any
74 * transaction. The caller must specify the locks already held
75 * on the inode.
76 */
77void
78xfs_trans_ijoin(
79 xfs_trans_t *tp,
80 xfs_inode_t *ip,
81 uint lock_flags)
82{
83 xfs_inode_log_item_t *iip;
84
85 ASSERT(ip->i_transp == NULL);
86 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
87 ASSERT(lock_flags & XFS_ILOCK_EXCL);
88 if (ip->i_itemp == NULL)
89 xfs_inode_item_init(ip, ip->i_mount);
90 iip = ip->i_itemp;
91 ASSERT(iip->ili_flags == 0);
92
93 /*
94 * Get a log_item_desc to point at the new item.
95 */
96 (void) xfs_trans_add_item(tp, (xfs_log_item_t*)(iip));
97
98 xfs_trans_inode_broot_debug(ip);
99
100 /*
101 * If the IO lock is already held, mark that in the inode log item.
102 */
103 if (lock_flags & XFS_IOLOCK_EXCL) {
104 iip->ili_flags |= XFS_ILI_IOLOCKED_EXCL;
105 } else if (lock_flags & XFS_IOLOCK_SHARED) {
106 iip->ili_flags |= XFS_ILI_IOLOCKED_SHARED;
107 }
108
109 /*
110 * Initialize i_transp so we can find it with xfs_inode_incore()
111 * in xfs_trans_iget() above.
112 */
113 ip->i_transp = tp;
114}
115
116
117
118/*
119 * Mark the inode as not needing to be unlocked when the inode item's
120 * IOP_UNLOCK() routine is called. The inode must already be locked
121 * and associated with the given transaction.
122 */
123/*ARGSUSED*/
124void
125xfs_trans_ihold(
126 xfs_trans_t *tp,
127 xfs_inode_t *ip)
128{
129 ASSERT(ip->i_transp == tp);
130 ASSERT(ip->i_itemp != NULL);
131 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
132
133 ip->i_itemp->ili_flags |= XFS_ILI_HOLD;
134}
135
136
137/*
138 * This is called to mark the fields indicated in fieldmask as needing
139 * to be logged when the transaction is committed. The inode must
140 * already be associated with the given transaction.
141 *
142 * The values for fieldmask are defined in xfs_inode_item.h. We always
143 * log all of the core inode if any of it has changed, and we always log
144 * all of the inline data/extents/b-tree root if any of them has changed.
145 */
146void
147xfs_trans_log_inode(
148 xfs_trans_t *tp,
149 xfs_inode_t *ip,
150 uint flags)
151{
152 xfs_log_item_desc_t *lidp;
153
154 ASSERT(ip->i_transp == tp);
155 ASSERT(ip->i_itemp != NULL);
156 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
157
158 lidp = xfs_trans_find_item(tp, (xfs_log_item_t*)(ip->i_itemp));
159 ASSERT(lidp != NULL);
160
161 tp->t_flags |= XFS_TRANS_DIRTY;
162 lidp->lid_flags |= XFS_LID_DIRTY;
163
164 /*
165 * Always OR in the bits from the ili_last_fields field.
166 * This is to coordinate with the xfs_iflush() and xfs_iflush_done()
167 * routines in the eventual clearing of the ilf_fields bits.
168 * See the big comment in xfs_iflush() for an explanation of
169 * this coordination mechanism.
170 */
171 flags |= ip->i_itemp->ili_last_fields;
172 ip->i_itemp->ili_format.ilf_fields |= flags;
173}
174
175#ifdef XFS_TRANS_DEBUG
176/*
177 * Keep track of the state of the inode btree root to make sure we
178 * log it properly.
179 */
180STATIC void
181xfs_trans_inode_broot_debug(
182 xfs_inode_t *ip)
183{
184 xfs_inode_log_item_t *iip;
185
186 ASSERT(ip->i_itemp != NULL);
187 iip = ip->i_itemp;
188 if (iip->ili_root_size != 0) {
189 ASSERT(iip->ili_orig_root != NULL);
190 kmem_free(iip->ili_orig_root);
191 iip->ili_root_size = 0;
192 iip->ili_orig_root = NULL;
193 }
194 if (ip->i_d.di_format == XFS_DINODE_FMT_BTREE) {
195 ASSERT((ip->i_df.if_broot != NULL) &&
196 (ip->i_df.if_broot_bytes > 0));
197 iip->ili_root_size = ip->i_df.if_broot_bytes;
198 iip->ili_orig_root =
199 (char*)kmem_alloc(iip->ili_root_size, KM_SLEEP);
200 memcpy(iip->ili_orig_root, (char*)(ip->i_df.if_broot),
201 iip->ili_root_size);
202 }
203}
204#endif