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 * Get an inode and join it to the transaction.
48 */
49int
50xfs_trans_iget(
51	xfs_mount_t	*mp,
52	xfs_trans_t	*tp,
53	xfs_ino_t	ino,
54	uint		flags,
55	uint		lock_flags,
56	xfs_inode_t	**ipp)
57{
58	int			error;
59
60	error = xfs_iget(mp, tp, ino, flags, lock_flags, ipp);
61	if (!error && tp) {
62		xfs_trans_ijoin(tp, *ipp);
63		(*ipp)->i_itemp->ili_lock_flags = lock_flags;
64	}
65	return error;
66}
67
68/*
69 * Add a locked inode to the transaction.
70 *
71 * The inode must be locked, and it cannot be associated with any transaction.
72 */
73void
74xfs_trans_ijoin(
75	struct xfs_trans	*tp,
76	struct xfs_inode	*ip)
77{
78	xfs_inode_log_item_t	*iip;
79
80	ASSERT(ip->i_transp == NULL);
81	ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
82	if (ip->i_itemp == NULL)
83		xfs_inode_item_init(ip, ip->i_mount);
84	iip = ip->i_itemp;
85	ASSERT(iip->ili_lock_flags == 0);
86
87	/*
88	 * Get a log_item_desc to point at the new item.
89	 */
90	xfs_trans_add_item(tp, &iip->ili_item);
91
92	xfs_trans_inode_broot_debug(ip);
93
94	/*
95	 * Initialize i_transp so we can find it with xfs_inode_incore()
96	 * in xfs_trans_iget() above.
97	 */
98	ip->i_transp = tp;
99}
100
101/*
102 * Add a locked inode to the transaction.
103 *
104 *
105 * Grabs a reference to the inode which will be dropped when the transaction
106 * is commited.  The inode will also be unlocked at that point.  The inode
107 * must be locked, and it cannot be associated with any transaction.
108 */
109void
110xfs_trans_ijoin_ref(
111	struct xfs_trans	*tp,
112	struct xfs_inode	*ip,
113	uint			lock_flags)
114{
115	xfs_trans_ijoin(tp, ip);
116	IHOLD(ip);
117	ip->i_itemp->ili_lock_flags = lock_flags;
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_transp == tp);
136	ASSERT(ip->i_itemp != NULL);
137	ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
138
139	tp->t_flags |= XFS_TRANS_DIRTY;
140	ip->i_itemp->ili_item.li_desc->lid_flags |= XFS_LID_DIRTY;
141
142	/*
143	 * Always OR in the bits from the ili_last_fields field.
144	 * This is to coordinate with the xfs_iflush() and xfs_iflush_done()
145	 * routines in the eventual clearing of the ilf_fields bits.
146	 * See the big comment in xfs_iflush() for an explanation of
147	 * this coordination mechanism.
148	 */
149	flags |= ip->i_itemp->ili_last_fields;
150	ip->i_itemp->ili_format.ilf_fields |= flags;
151}
152
153#ifdef XFS_TRANS_DEBUG
154/*
155 * Keep track of the state of the inode btree root to make sure we
156 * log it properly.
157 */
158STATIC void
159xfs_trans_inode_broot_debug(
160	xfs_inode_t	*ip)
161{
162	xfs_inode_log_item_t	*iip;
163
164	ASSERT(ip->i_itemp != NULL);
165	iip = ip->i_itemp;
166	if (iip->ili_root_size != 0) {
167		ASSERT(iip->ili_orig_root != NULL);
168		kmem_free(iip->ili_orig_root);
169		iip->ili_root_size = 0;
170		iip->ili_orig_root = NULL;
171	}
172	if (ip->i_d.di_format == XFS_DINODE_FMT_BTREE) {
173		ASSERT((ip->i_df.if_broot != NULL) &&
174		       (ip->i_df.if_broot_bytes > 0));
175		iip->ili_root_size = ip->i_df.if_broot_bytes;
176		iip->ili_orig_root =
177			(char*)kmem_alloc(iip->ili_root_size, KM_SLEEP);
178		memcpy(iip->ili_orig_root, (char*)(ip->i_df.if_broot),
179		      iip->ili_root_size);
180	}
181}
182#endif
183