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authorDave Chinner <dchinner@redhat.com>2013-10-22 19:36:05 -0400
committerBen Myers <bpm@sgi.com>2013-10-23 15:11:30 -0400
commit70a9883c5f34b215b8a77665cefd0398edc5a9ef (patch)
tree482f6d16e0d4ca17a974320e07f0e1fa20bca334 /fs/xfs/xfs_shared.h
parent865e9446b4c17f78be0b1387426394b6bfc278f3 (diff)
xfs: create a shared header file for format-related information
All of the buffer operations structures are needed to be exported for xfs_db, so move them all to a common location rather than spreading them all over the place. They are verifying the on-disk format, so while xfs_format.h might be a good place, it is not part of the on disk format. Hence we need to create a new header file that we centralise these related definitions. Start by moving the bffer operations structures, and then also move all the other definitions that have crept into xfs_log_format.h and xfs_format.h as there was no other shared header file to put them in. Signed-off-by: Dave Chinner <dchinner@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Ben Myers <bpm@sgi.com>
Diffstat (limited to 'fs/xfs/xfs_shared.h')
-rw-r--r--fs/xfs/xfs_shared.h244
1 files changed, 244 insertions, 0 deletions
diff --git a/fs/xfs/xfs_shared.h b/fs/xfs/xfs_shared.h
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1/*
2 * Copyright (c) 2000-2005 Silicon Graphics, Inc.
3 * Copyright (c) 2013 Red Hat, Inc.
4 * All Rights Reserved.
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License as
8 * published by the Free Software Foundation.
9 *
10 * This program is distributed in the hope that it would be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
18 */
19#ifndef __XFS_SHARED_H__
20#define __XFS_SHARED_H__
21
22/*
23 * Definitions shared between kernel and userspace that don't fit into any other
24 * header file that is shared with userspace.
25 */
26struct xfs_ifork;
27struct xfs_buf;
28struct xfs_buf_ops;
29struct xfs_mount;
30struct xfs_trans;
31struct xfs_inode;
32
33/*
34 * Buffer verifier operations are widely used, including userspace tools
35 */
36extern const struct xfs_buf_ops xfs_agf_buf_ops;
37extern const struct xfs_buf_ops xfs_agi_buf_ops;
38extern const struct xfs_buf_ops xfs_agf_buf_ops;
39extern const struct xfs_buf_ops xfs_agfl_buf_ops;
40extern const struct xfs_buf_ops xfs_allocbt_buf_ops;
41extern const struct xfs_buf_ops xfs_attr3_leaf_buf_ops;
42extern const struct xfs_buf_ops xfs_attr3_rmt_buf_ops;
43extern const struct xfs_buf_ops xfs_bmbt_buf_ops;
44extern const struct xfs_buf_ops xfs_da3_node_buf_ops;
45extern const struct xfs_buf_ops xfs_dquot_buf_ops;
46extern const struct xfs_buf_ops xfs_symlink_buf_ops;
47extern const struct xfs_buf_ops xfs_agi_buf_ops;
48extern const struct xfs_buf_ops xfs_inobt_buf_ops;
49extern const struct xfs_buf_ops xfs_inode_buf_ops;
50extern const struct xfs_buf_ops xfs_inode_buf_ra_ops;
51extern const struct xfs_buf_ops xfs_dquot_buf_ops;
52extern const struct xfs_buf_ops xfs_sb_buf_ops;
53extern const struct xfs_buf_ops xfs_sb_quiet_buf_ops;
54extern const struct xfs_buf_ops xfs_symlink_buf_ops;
55
56/*
57 * Transaction types. Used to distinguish types of buffers. These never reach
58 * the log.
59 */
60#define XFS_TRANS_SETATTR_NOT_SIZE 1
61#define XFS_TRANS_SETATTR_SIZE 2
62#define XFS_TRANS_INACTIVE 3
63#define XFS_TRANS_CREATE 4
64#define XFS_TRANS_CREATE_TRUNC 5
65#define XFS_TRANS_TRUNCATE_FILE 6
66#define XFS_TRANS_REMOVE 7
67#define XFS_TRANS_LINK 8
68#define XFS_TRANS_RENAME 9
69#define XFS_TRANS_MKDIR 10
70#define XFS_TRANS_RMDIR 11
71#define XFS_TRANS_SYMLINK 12
72#define XFS_TRANS_SET_DMATTRS 13
73#define XFS_TRANS_GROWFS 14
74#define XFS_TRANS_STRAT_WRITE 15
75#define XFS_TRANS_DIOSTRAT 16
76/* 17 was XFS_TRANS_WRITE_SYNC */
77#define XFS_TRANS_WRITEID 18
78#define XFS_TRANS_ADDAFORK 19
79#define XFS_TRANS_ATTRINVAL 20
80#define XFS_TRANS_ATRUNCATE 21
81#define XFS_TRANS_ATTR_SET 22
82#define XFS_TRANS_ATTR_RM 23
83#define XFS_TRANS_ATTR_FLAG 24
84#define XFS_TRANS_CLEAR_AGI_BUCKET 25
85#define XFS_TRANS_QM_SBCHANGE 26
86/*
87 * Dummy entries since we use the transaction type to index into the
88 * trans_type[] in xlog_recover_print_trans_head()
89 */
90#define XFS_TRANS_DUMMY1 27
91#define XFS_TRANS_DUMMY2 28
92#define XFS_TRANS_QM_QUOTAOFF 29
93#define XFS_TRANS_QM_DQALLOC 30
94#define XFS_TRANS_QM_SETQLIM 31
95#define XFS_TRANS_QM_DQCLUSTER 32
96#define XFS_TRANS_QM_QINOCREATE 33
97#define XFS_TRANS_QM_QUOTAOFF_END 34
98#define XFS_TRANS_SB_UNIT 35
99#define XFS_TRANS_FSYNC_TS 36
100#define XFS_TRANS_GROWFSRT_ALLOC 37
101#define XFS_TRANS_GROWFSRT_ZERO 38
102#define XFS_TRANS_GROWFSRT_FREE 39
103#define XFS_TRANS_SWAPEXT 40
104#define XFS_TRANS_SB_COUNT 41
105#define XFS_TRANS_CHECKPOINT 42
106#define XFS_TRANS_ICREATE 43
107#define XFS_TRANS_TYPE_MAX 43
108/* new transaction types need to be reflected in xfs_logprint(8) */
109
110#define XFS_TRANS_TYPES \
111 { XFS_TRANS_SETATTR_NOT_SIZE, "SETATTR_NOT_SIZE" }, \
112 { XFS_TRANS_SETATTR_SIZE, "SETATTR_SIZE" }, \
113 { XFS_TRANS_INACTIVE, "INACTIVE" }, \
114 { XFS_TRANS_CREATE, "CREATE" }, \
115 { XFS_TRANS_CREATE_TRUNC, "CREATE_TRUNC" }, \
116 { XFS_TRANS_TRUNCATE_FILE, "TRUNCATE_FILE" }, \
117 { XFS_TRANS_REMOVE, "REMOVE" }, \
118 { XFS_TRANS_LINK, "LINK" }, \
119 { XFS_TRANS_RENAME, "RENAME" }, \
120 { XFS_TRANS_MKDIR, "MKDIR" }, \
121 { XFS_TRANS_RMDIR, "RMDIR" }, \
122 { XFS_TRANS_SYMLINK, "SYMLINK" }, \
123 { XFS_TRANS_SET_DMATTRS, "SET_DMATTRS" }, \
124 { XFS_TRANS_GROWFS, "GROWFS" }, \
125 { XFS_TRANS_STRAT_WRITE, "STRAT_WRITE" }, \
126 { XFS_TRANS_DIOSTRAT, "DIOSTRAT" }, \
127 { XFS_TRANS_WRITEID, "WRITEID" }, \
128 { XFS_TRANS_ADDAFORK, "ADDAFORK" }, \
129 { XFS_TRANS_ATTRINVAL, "ATTRINVAL" }, \
130 { XFS_TRANS_ATRUNCATE, "ATRUNCATE" }, \
131 { XFS_TRANS_ATTR_SET, "ATTR_SET" }, \
132 { XFS_TRANS_ATTR_RM, "ATTR_RM" }, \
133 { XFS_TRANS_ATTR_FLAG, "ATTR_FLAG" }, \
134 { XFS_TRANS_CLEAR_AGI_BUCKET, "CLEAR_AGI_BUCKET" }, \
135 { XFS_TRANS_QM_SBCHANGE, "QM_SBCHANGE" }, \
136 { XFS_TRANS_QM_QUOTAOFF, "QM_QUOTAOFF" }, \
137 { XFS_TRANS_QM_DQALLOC, "QM_DQALLOC" }, \
138 { XFS_TRANS_QM_SETQLIM, "QM_SETQLIM" }, \
139 { XFS_TRANS_QM_DQCLUSTER, "QM_DQCLUSTER" }, \
140 { XFS_TRANS_QM_QINOCREATE, "QM_QINOCREATE" }, \
141 { XFS_TRANS_QM_QUOTAOFF_END, "QM_QOFF_END" }, \
142 { XFS_TRANS_SB_UNIT, "SB_UNIT" }, \
143 { XFS_TRANS_FSYNC_TS, "FSYNC_TS" }, \
144 { XFS_TRANS_GROWFSRT_ALLOC, "GROWFSRT_ALLOC" }, \
145 { XFS_TRANS_GROWFSRT_ZERO, "GROWFSRT_ZERO" }, \
146 { XFS_TRANS_GROWFSRT_FREE, "GROWFSRT_FREE" }, \
147 { XFS_TRANS_SWAPEXT, "SWAPEXT" }, \
148 { XFS_TRANS_SB_COUNT, "SB_COUNT" }, \
149 { XFS_TRANS_CHECKPOINT, "CHECKPOINT" }, \
150 { XFS_TRANS_DUMMY1, "DUMMY1" }, \
151 { XFS_TRANS_DUMMY2, "DUMMY2" }, \
152 { XLOG_UNMOUNT_REC_TYPE, "UNMOUNT" }
153
154/*
155 * This structure is used to track log items associated with
156 * a transaction. It points to the log item and keeps some
157 * flags to track the state of the log item. It also tracks
158 * the amount of space needed to log the item it describes
159 * once we get to commit processing (see xfs_trans_commit()).
160 */
161struct xfs_log_item_desc {
162 struct xfs_log_item *lid_item;
163 struct list_head lid_trans;
164 unsigned char lid_flags;
165};
166
167#define XFS_LID_DIRTY 0x1
168
169/* log size calculation functions */
170int xfs_log_calc_unit_res(struct xfs_mount *mp, int unit_bytes);
171int xfs_log_calc_minimum_size(struct xfs_mount *);
172
173
174/*
175 * Values for t_flags.
176 */
177#define XFS_TRANS_DIRTY 0x01 /* something needs to be logged */
178#define XFS_TRANS_SB_DIRTY 0x02 /* superblock is modified */
179#define XFS_TRANS_PERM_LOG_RES 0x04 /* xact took a permanent log res */
180#define XFS_TRANS_SYNC 0x08 /* make commit synchronous */
181#define XFS_TRANS_DQ_DIRTY 0x10 /* at least one dquot in trx dirty */
182#define XFS_TRANS_RESERVE 0x20 /* OK to use reserved data blocks */
183#define XFS_TRANS_FREEZE_PROT 0x40 /* Transaction has elevated writer
184 count in superblock */
185/*
186 * Values for call flags parameter.
187 */
188#define XFS_TRANS_RELEASE_LOG_RES 0x4
189#define XFS_TRANS_ABORT 0x8
190
191/*
192 * Field values for xfs_trans_mod_sb.
193 */
194#define XFS_TRANS_SB_ICOUNT 0x00000001
195#define XFS_TRANS_SB_IFREE 0x00000002
196#define XFS_TRANS_SB_FDBLOCKS 0x00000004
197#define XFS_TRANS_SB_RES_FDBLOCKS 0x00000008
198#define XFS_TRANS_SB_FREXTENTS 0x00000010
199#define XFS_TRANS_SB_RES_FREXTENTS 0x00000020
200#define XFS_TRANS_SB_DBLOCKS 0x00000040
201#define XFS_TRANS_SB_AGCOUNT 0x00000080
202#define XFS_TRANS_SB_IMAXPCT 0x00000100
203#define XFS_TRANS_SB_REXTSIZE 0x00000200
204#define XFS_TRANS_SB_RBMBLOCKS 0x00000400
205#define XFS_TRANS_SB_RBLOCKS 0x00000800
206#define XFS_TRANS_SB_REXTENTS 0x00001000
207#define XFS_TRANS_SB_REXTSLOG 0x00002000
208
209/*
210 * Here we centralize the specification of XFS meta-data buffer reference count
211 * values. This determines how hard the buffer cache tries to hold onto the
212 * buffer.
213 */
214#define XFS_AGF_REF 4
215#define XFS_AGI_REF 4
216#define XFS_AGFL_REF 3
217#define XFS_INO_BTREE_REF 3
218#define XFS_ALLOC_BTREE_REF 2
219#define XFS_BMAP_BTREE_REF 2
220#define XFS_DIR_BTREE_REF 2
221#define XFS_INO_REF 2
222#define XFS_ATTR_BTREE_REF 1
223#define XFS_DQUOT_REF 1
224
225/*
226 * Flags for xfs_trans_ichgtime().
227 */
228#define XFS_ICHGTIME_MOD 0x1 /* data fork modification timestamp */
229#define XFS_ICHGTIME_CHG 0x2 /* inode field change timestamp */
230#define XFS_ICHGTIME_CREATE 0x4 /* inode create timestamp */
231
232
233/*
234 * Symlink decoding/encoding functions
235 */
236int xfs_symlink_blocks(struct xfs_mount *mp, int pathlen);
237int xfs_symlink_hdr_set(struct xfs_mount *mp, xfs_ino_t ino, uint32_t offset,
238 uint32_t size, struct xfs_buf *bp);
239bool xfs_symlink_hdr_ok(struct xfs_mount *mp, xfs_ino_t ino, uint32_t offset,
240 uint32_t size, struct xfs_buf *bp);
241void xfs_symlink_local_to_remote(struct xfs_trans *tp, struct xfs_buf *bp,
242 struct xfs_inode *ip, struct xfs_ifork *ifp);
243
244#endif /* __XFS_SHARED_H__ */
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