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_format.h"
22 #include "xfs_log_format.h"
23 #include "xfs_trans_resv.h"
24 #include "xfs_bit.h"
25 #include "xfs_mount.h"
26 #include "xfs_trans.h"
27 #include "xfs_trans_priv.h"
28 #include "xfs_error.h"
29 #include "xfs_icreate_item.h"
30 #include "xfs_log.h"
31
32 kmem_zone_t *xfs_icreate_zone; /* inode create item zone */
33
ICR_ITEM(struct xfs_log_item * lip)34 static 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 */
44 STATIC void
xfs_icreate_item_size(struct xfs_log_item * lip,int * nvecs,int * nbytes)45 xfs_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 */
58 STATIC void
xfs_icreate_item_format(struct xfs_log_item * lip,struct xfs_log_vec * lv)59 xfs_icreate_item_format(
60 struct xfs_log_item *lip,
61 struct xfs_log_vec *lv)
62 {
63 struct xfs_icreate_item *icp = ICR_ITEM(lip);
64 struct xfs_log_iovec *vecp = NULL;
65
66 xlog_copy_iovec(lv, &vecp, XLOG_REG_TYPE_ICREATE,
67 &icp->ic_format,
68 sizeof(struct xfs_icreate_log));
69 }
70
71
72 /* Pinning has no meaning for the create item, so just return. */
73 STATIC void
xfs_icreate_item_pin(struct xfs_log_item * lip)74 xfs_icreate_item_pin(
75 struct xfs_log_item *lip)
76 {
77 }
78
79
80 /* pinning has no meaning for the create item, so just return. */
81 STATIC void
xfs_icreate_item_unpin(struct xfs_log_item * lip,int remove)82 xfs_icreate_item_unpin(
83 struct xfs_log_item *lip,
84 int remove)
85 {
86 }
87
88 STATIC void
xfs_icreate_item_unlock(struct xfs_log_item * lip)89 xfs_icreate_item_unlock(
90 struct xfs_log_item *lip)
91 {
92 struct xfs_icreate_item *icp = ICR_ITEM(lip);
93
94 if (icp->ic_item.li_flags & XFS_LI_ABORTED)
95 kmem_zone_free(xfs_icreate_zone, icp);
96 return;
97 }
98
99 /*
100 * Because we have ordered buffers being tracked in the AIL for the inode
101 * creation, we don't need the create item after this. Hence we can free
102 * the log item and return -1 to tell the caller we're done with the item.
103 */
104 STATIC xfs_lsn_t
xfs_icreate_item_committed(struct xfs_log_item * lip,xfs_lsn_t lsn)105 xfs_icreate_item_committed(
106 struct xfs_log_item *lip,
107 xfs_lsn_t lsn)
108 {
109 struct xfs_icreate_item *icp = ICR_ITEM(lip);
110
111 kmem_zone_free(xfs_icreate_zone, icp);
112 return (xfs_lsn_t)-1;
113 }
114
115 /* item can never get into the AIL */
116 STATIC uint
xfs_icreate_item_push(struct xfs_log_item * lip,struct list_head * buffer_list)117 xfs_icreate_item_push(
118 struct xfs_log_item *lip,
119 struct list_head *buffer_list)
120 {
121 ASSERT(0);
122 return XFS_ITEM_SUCCESS;
123 }
124
125 /* Ordered buffers do the dependency tracking here, so this does nothing. */
126 STATIC void
xfs_icreate_item_committing(struct xfs_log_item * lip,xfs_lsn_t lsn)127 xfs_icreate_item_committing(
128 struct xfs_log_item *lip,
129 xfs_lsn_t lsn)
130 {
131 }
132
133 /*
134 * This is the ops vector shared by all buf log items.
135 */
136 static struct xfs_item_ops xfs_icreate_item_ops = {
137 .iop_size = xfs_icreate_item_size,
138 .iop_format = xfs_icreate_item_format,
139 .iop_pin = xfs_icreate_item_pin,
140 .iop_unpin = xfs_icreate_item_unpin,
141 .iop_push = xfs_icreate_item_push,
142 .iop_unlock = xfs_icreate_item_unlock,
143 .iop_committed = xfs_icreate_item_committed,
144 .iop_committing = xfs_icreate_item_committing,
145 };
146
147
148 /*
149 * Initialize the inode log item for a newly allocated (in-core) inode.
150 *
151 * Inode extents can only reside within an AG. Hence specify the starting
152 * block for the inode chunk by offset within an AG as well as the
153 * length of the allocated extent.
154 *
155 * This joins the item to the transaction and marks it dirty so
156 * that we don't need a separate call to do this, nor does the
157 * caller need to know anything about the icreate item.
158 */
159 void
xfs_icreate_log(struct xfs_trans * tp,xfs_agnumber_t agno,xfs_agblock_t agbno,unsigned int count,unsigned int inode_size,xfs_agblock_t length,unsigned int generation)160 xfs_icreate_log(
161 struct xfs_trans *tp,
162 xfs_agnumber_t agno,
163 xfs_agblock_t agbno,
164 unsigned int count,
165 unsigned int inode_size,
166 xfs_agblock_t length,
167 unsigned int generation)
168 {
169 struct xfs_icreate_item *icp;
170
171 icp = kmem_zone_zalloc(xfs_icreate_zone, KM_SLEEP);
172
173 xfs_log_item_init(tp->t_mountp, &icp->ic_item, XFS_LI_ICREATE,
174 &xfs_icreate_item_ops);
175
176 icp->ic_format.icl_type = XFS_LI_ICREATE;
177 icp->ic_format.icl_size = 1; /* single vector */
178 icp->ic_format.icl_ag = cpu_to_be32(agno);
179 icp->ic_format.icl_agbno = cpu_to_be32(agbno);
180 icp->ic_format.icl_count = cpu_to_be32(count);
181 icp->ic_format.icl_isize = cpu_to_be32(inode_size);
182 icp->ic_format.icl_length = cpu_to_be32(length);
183 icp->ic_format.icl_gen = cpu_to_be32(generation);
184
185 xfs_trans_add_item(tp, &icp->ic_item);
186 tp->t_flags |= XFS_TRANS_DIRTY;
187 icp->ic_item.li_desc->lid_flags |= XFS_LID_DIRTY;
188 }
189