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) 2008-2010, 2013 Dave Chinner
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_shared.h"
21#include "xfs_log_format.h"
22#include "xfs_trans_resv.h"
23#include "xfs_bit.h"
24#include "xfs_sb.h"
25#include "xfs_ag.h"
26#include "xfs_mount.h"
27#include "xfs_trans.h"
28#include "xfs_trans_priv.h"
29#include "xfs_error.h"
30#include "xfs_icreate_item.h"
31
32kmem_zone_t *xfs_icreate_zone; /* inode create item zone */
33
34static inline struct xfs_icreate_item *ICR_ITEM(struct xfs_log_item *lip)
35{
36 return container_of(lip, struct xfs_icreate_item, ic_item);
37}
38
39/*
40 * This returns the number of iovecs needed to log the given inode item.
41 *
42 * We only need one iovec for the icreate log structure.
43 */
44STATIC void
45xfs_icreate_item_size(
46 struct xfs_log_item *lip,
47 int *nvecs,
48 int *nbytes)
49{
50 *nvecs += 1;
51 *nbytes += sizeof(struct xfs_icreate_log);
52}
53
54/*
55 * This is called to fill in the vector of log iovecs for the
56 * given inode create log item.
57 */
58STATIC void
59xfs_icreate_item_format(
60 struct xfs_log_item *lip,
61 struct xfs_log_iovec *log_vector)
62{
63 struct xfs_icreate_item *icp = ICR_ITEM(lip);
64
65 log_vector->i_addr = (xfs_caddr_t)&icp->ic_format;
66 log_vector->i_len = sizeof(struct xfs_icreate_log);
67 log_vector->i_type = XLOG_REG_TYPE_ICREATE;
68}
69
70
71/* Pinning has no meaning for the create item, so just return. */
72STATIC void
73xfs_icreate_item_pin(
74 struct xfs_log_item *lip)
75{
76}
77
78
79/* pinning has no meaning for the create item, so just return. */
80STATIC void
81xfs_icreate_item_unpin(
82 struct xfs_log_item *lip,
83 int remove)
84{
85}
86
87STATIC void
88xfs_icreate_item_unlock(
89 struct xfs_log_item *lip)
90{
91 struct xfs_icreate_item *icp = ICR_ITEM(lip);
92
93 if (icp->ic_item.li_flags & XFS_LI_ABORTED)
94 kmem_zone_free(xfs_icreate_zone, icp);
95 return;
96}
97
98/*
99 * Because we have ordered buffers being tracked in the AIL for the inode
100 * creation, we don't need the create item after this. Hence we can free
101 * the log item and return -1 to tell the caller we're done with the item.
102 */
103STATIC xfs_lsn_t
104xfs_icreate_item_committed(
105 struct xfs_log_item *lip,
106 xfs_lsn_t lsn)
107{
108 struct xfs_icreate_item *icp = ICR_ITEM(lip);
109
110 kmem_zone_free(xfs_icreate_zone, icp);
111 return (xfs_lsn_t)-1;
112}
113
114/* item can never get into the AIL */
115STATIC uint
116xfs_icreate_item_push(
117 struct xfs_log_item *lip,
118 struct list_head *buffer_list)
119{
120 ASSERT(0);
121 return XFS_ITEM_SUCCESS;
122}
123
124/* Ordered buffers do the dependency tracking here, so this does nothing. */
125STATIC void
126xfs_icreate_item_committing(
127 struct xfs_log_item *lip,
128 xfs_lsn_t lsn)
129{
130}
131
132/*
133 * This is the ops vector shared by all buf log items.
134 */
135static struct xfs_item_ops xfs_icreate_item_ops = {
136 .iop_size = xfs_icreate_item_size,
137 .iop_format = xfs_icreate_item_format,
138 .iop_pin = xfs_icreate_item_pin,
139 .iop_unpin = xfs_icreate_item_unpin,
140 .iop_push = xfs_icreate_item_push,
141 .iop_unlock = xfs_icreate_item_unlock,
142 .iop_committed = xfs_icreate_item_committed,
143 .iop_committing = xfs_icreate_item_committing,
144};
145
146
147/*
148 * Initialize the inode log item for a newly allocated (in-core) inode.
149 *
150 * Inode extents can only reside within an AG. Hence specify the starting
151 * block for the inode chunk by offset within an AG as well as the
152 * length of the allocated extent.
153 *
154 * This joins the item to the transaction and marks it dirty so
155 * that we don't need a separate call to do this, nor does the
156 * caller need to know anything about the icreate item.
157 */
158void
159xfs_icreate_log(
160 struct xfs_trans *tp,
161 xfs_agnumber_t agno,
162 xfs_agblock_t agbno,
163 unsigned int count,
164 unsigned int inode_size,
165 xfs_agblock_t length,
166 unsigned int generation)
167{
168 struct xfs_icreate_item *icp;
169
170 icp = kmem_zone_zalloc(xfs_icreate_zone, KM_SLEEP);
171
172 xfs_log_item_init(tp->t_mountp, &icp->ic_item, XFS_LI_ICREATE,
173 &xfs_icreate_item_ops);
174
175 icp->ic_format.icl_type = XFS_LI_ICREATE;
176 icp->ic_format.icl_size = 1; /* single vector */
177 icp->ic_format.icl_ag = cpu_to_be32(agno);
178 icp->ic_format.icl_agbno = cpu_to_be32(agbno);
179 icp->ic_format.icl_count = cpu_to_be32(count);
180 icp->ic_format.icl_isize = cpu_to_be32(inode_size);
181 icp->ic_format.icl_length = cpu_to_be32(length);
182 icp->ic_format.icl_gen = cpu_to_be32(generation);
183
184 xfs_trans_add_item(tp, &icp->ic_item);
185 tp->t_flags |= XFS_TRANS_DIRTY;
186 icp->ic_item.li_desc->lid_flags |= XFS_LID_DIRTY;
187}