summaryrefslogtreecommitdiffstats
path: root/kernel/fs/xfs/libxfs/xfs_shared.h
blob: 5be529707903fb42bc4ebccc176e57b7a3470d96 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
/*
 * Copyright (c) 2000-2005 Silicon Graphics, Inc.
 * Copyright (c) 2013 Red Hat, Inc.
 * All Rights Reserved.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it would be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write the Free Software Foundation,
 * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */
#ifndef __XFS_SHARED_H__
#define __XFS_SHARED_H__

/*
 * Definitions shared between kernel and userspace that don't fit into any other
 * header file that is shared with userspace.
 */
struct xfs_ifork;
struct xfs_buf;
struct xfs_buf_ops;
struct xfs_mount;
struct xfs_trans;
struct xfs_inode;

/*
 * Buffer verifier operations are widely used, including userspace tools
 */
extern const struct xfs_buf_ops xfs_agf_buf_ops;
extern const struct xfs_buf_ops xfs_agi_buf_ops;
extern const struct xfs_buf_ops xfs_agf_buf_ops;
extern const struct xfs_buf_ops xfs_agfl_buf_ops;
extern const struct xfs_buf_ops xfs_allocbt_buf_ops;
extern const struct xfs_buf_ops xfs_attr3_leaf_buf_ops;
extern const struct xfs_buf_ops xfs_attr3_rmt_buf_ops;
extern const struct xfs_buf_ops xfs_bmbt_buf_ops;
extern const struct xfs_buf_ops xfs_da3_node_buf_ops;
extern const struct xfs_buf_ops xfs_dquot_buf_ops;
extern const struct xfs_buf_ops xfs_symlink_buf_ops;
extern const struct xfs_buf_ops xfs_agi_buf_ops;
extern const struct xfs_buf_ops xfs_inobt_buf_ops;
extern const struct xfs_buf_ops xfs_inode_buf_ops;
extern const struct xfs_buf_ops xfs_inode_buf_ra_ops;
extern const struct xfs_buf_ops xfs_dquot_buf_ops;
extern const struct xfs_buf_ops xfs_sb_buf_ops;
extern const struct xfs_buf_ops xfs_sb_quiet_buf_ops;
extern const struct xfs_buf_ops xfs_symlink_buf_ops;

/*
 * Transaction types.  Used to distinguish types of buffers. These never reach
 * the log.
 */
#define XFS_TRANS_SETATTR_NOT_SIZE	1
#define XFS_TRANS_SETATTR_SIZE		2
#define XFS_TRANS_INACTIVE		3
#define XFS_TRANS_CREATE		4
#define XFS_TRANS_CREATE_TRUNC		5
#define XFS_TRANS_TRUNCATE_FILE		6
#define XFS_TRANS_REMOVE		7
#define XFS_TRANS_LINK			8
#define XFS_TRANS_RENAME		9
#define XFS_TRANS_MKDIR			10
#define XFS_TRANS_RMDIR			11
#define XFS_TRANS_SYMLINK		12
#define XFS_TRANS_SET_DMATTRS		13
#define XFS_TRANS_GROWFS		14
#define XFS_TRANS_STRAT_WRITE		15
#define XFS_TRANS_DIOSTRAT		16
/* 17 was XFS_TRANS_WRITE_SYNC */
#define	XFS_TRANS_WRITEID		18
#define	XFS_TRANS_ADDAFORK		19
#define	XFS_TRANS_ATTRINVAL		20
#define	XFS_TRANS_ATRUNCATE		21
#define	XFS_TRANS_ATTR_SET		22
#define	XFS_TRANS_ATTR_RM		23
#define	XFS_TRANS_ATTR_FLAG		24
#define	XFS_TRANS_CLEAR_AGI_BUCKET	25
#define XFS_TRANS_SB_CHANGE		26
/*
 * Dummy entries since we use the transaction type to index into the
 * trans_type[] in xlog_recover_print_trans_head()
 */
#define XFS_TRANS_DUMMY1		27
#define XFS_TRANS_DUMMY2		28
#define XFS_TRANS_QM_QUOTAOFF		29
#define XFS_TRANS_QM_DQALLOC		30
#define XFS_TRANS_QM_SETQLIM		31
#define XFS_TRANS_QM_DQCLUSTER		32
#define XFS_TRANS_QM_QINOCREATE		33
#define XFS_TRANS_QM_QUOTAOFF_END	34
#define XFS_TRANS_FSYNC_TS		35
#define	XFS_TRANS_GROWFSRT_ALLOC	36
#define	XFS_TRANS_GROWFSRT_ZERO		37
#define	XFS_TRANS_GROWFSRT_FREE		38
#define	XFS_TRANS_SWAPEXT		39
#define	XFS_TRANS_CHECKPOINT		40
#define	XFS_TRANS_ICREATE		41
#define	XFS_TRANS_CREATE_TMPFILE	42
#define	XFS_TRANS_TYPE_MAX		43
/* new transaction types need to be reflected in xfs_logprint(8) */

#define XFS_TRANS_TYPES \
	{ XFS_TRANS_SETATTR_NOT_SIZE,	"SETATTR_NOT_SIZE" }, \
	{ XFS_TRANS_SETATTR_SIZE,	"SETATTR_SIZE" }, \
	{ XFS_TRANS_INACTIVE,		"INACTIVE" }, \
	{ XFS_TRANS_CREATE,		"CREATE" }, \
	{ XFS_TRANS_CREATE_TRUNC,	"CREATE_TRUNC" }, \
	{ XFS_TRANS_TRUNCATE_FILE,	"TRUNCATE_FILE" }, \
	{ XFS_TRANS_REMOVE,		"REMOVE" }, \
	{ XFS_TRANS_LINK,		"LINK" }, \
	{ XFS_TRANS_RENAME,		"RENAME" }, \
	{ XFS_TRANS_MKDIR,		"MKDIR" }, \
	{ XFS_TRANS_RMDIR,		"RMDIR" }, \
	{ XFS_TRANS_SYMLINK,		"SYMLINK" }, \
	{ XFS_TRANS_SET_DMATTRS,	"SET_DMATTRS" }, \
	{ XFS_TRANS_GROWFS,		"GROWFS" }, \
	{ XFS_TRANS_STRAT_WRITE,	"STRAT_WRITE" }, \
	{ XFS_TRANS_DIOSTRAT,		"DIOSTRAT" }, \
	{ XFS_TRANS_WRITEID,		"WRITEID" }, \
	{ XFS_TRANS_ADDAFORK,		"ADDAFORK" }, \
	{ XFS_TRANS_ATTRINVAL,		"ATTRINVAL" }, \
	{ XFS_TRANS_ATRUNCATE,		"ATRUNCATE" }, \
	{ XFS_TRANS_ATTR_SET,		"ATTR_SET" }, \
	{ XFS_TRANS_ATTR_RM,		"ATTR_RM" }, \
	{ XFS_TRANS_ATTR_FLAG,		"ATTR_FLAG" }, \
	{ XFS_TRANS_CLEAR_AGI_BUCKET,	"CLEAR_AGI_BUCKET" }, \
	{ XFS_TRANS_SB_CHANGE,		"SBCHANGE" }, \
	{ XFS_TRANS_DUMMY1,		"DUMMY1" }, \
	{ XFS_TRANS_DUMMY2,		"DUMMY2" }, \
	{ XFS_TRANS_QM_QUOTAOFF,	"QM_QUOTAOFF" }, \
	{ XFS_TRANS_QM_DQALLOC,		"QM_DQALLOC" }, \
	{ XFS_TRANS_QM_SETQLIM,		"QM_SETQLIM" }, \
	{ XFS_TRANS_QM_DQCLUSTER,	"QM_DQCLUSTER" }, \
	{ XFS_TRANS_QM_QINOCREATE,	"QM_QINOCREATE" }, \
	{ XFS_TRANS_QM_QUOTAOFF_END,	"QM_QOFF_END" }, \
	{ XFS_TRANS_FSYNC_TS,		"FSYNC_TS" }, \
	{ XFS_TRANS_GROWFSRT_ALLOC,	"GROWFSRT_ALLOC" }, \
	{ XFS_TRANS_GROWFSRT_ZERO,	"GROWFSRT_ZERO" }, \
	{ XFS_TRANS_GROWFSRT_FREE,	"GROWFSRT_FREE" }, \
	{ XFS_TRANS_SWAPEXT,		"SWAPEXT" }, \
	{ XFS_TRANS_CHECKPOINT,		"CHECKPOINT" }, \
	{ XFS_TRANS_ICREATE,		"ICREATE" }, \
	{ XFS_TRANS_CREATE_TMPFILE,	"CREATE_TMPFILE" }, \
	{ XLOG_UNMOUNT_REC_TYPE,	"UNMOUNT" }

/*
 * This structure is used to track log items associated with
 * a transaction.  It points to the log item and keeps some
 * flags to track the state of the log item.  It also tracks
 * the amount of space needed to log the item it describes
 * once we get to commit processing (see xfs_trans_commit()).
 */
struct xfs_log_item_desc {
	struct xfs_log_item	*lid_item;
	struct list_head	lid_trans;
	unsigned char		lid_flags;
};

#define XFS_LID_DIRTY		0x1

/* log size calculation functions */
int	xfs_log_calc_unit_res(struct xfs_mount *mp, int unit_bytes);
int	xfs_log_calc_minimum_size(struct xfs_mount *);


/*
 * Values for t_flags.
 */
#define	XFS_TRANS_DIRTY		0x01	/* something needs to be logged */
#define	XFS_TRANS_SB_DIRTY	0x02	/* superblock is modified */
#define	XFS_TRANS_PERM_LOG_RES	0x04	/* xact took a permanent log res */
#define	XFS_TRANS_SYNC		0x08	/* make commit synchronous */
#define XFS_TRANS_DQ_DIRTY	0x10	/* at least one dquot in trx dirty */
#define XFS_TRANS_RESERVE	0x20    /* OK to use reserved data blocks */
#define XFS_TRANS_FREEZE_PROT	0x40	/* Transaction has elevated writer
					   count in superblock */
/*
 * Field values for xfs_trans_mod_sb.
 */
#define	XFS_TRANS_SB_ICOUNT		0x00000001
#define	XFS_TRANS_SB_IFREE		0x00000002
#define	XFS_TRANS_SB_FDBLOCKS		0x00000004
#define	XFS_TRANS_SB_RES_FDBLOCKS	0x00000008
#define	XFS_TRANS_SB_FREXTENTS		0x00000010
#define	XFS_TRANS_SB_RES_FREXTENTS	0x00000020
#define	XFS_TRANS_SB_DBLOCKS		0x00000040
#define	XFS_TRANS_SB_AGCOUNT		0x00000080
#define	XFS_TRANS_SB_IMAXPCT		0x00000100
#define	XFS_TRANS_SB_REXTSIZE		0x00000200
#define	XFS_TRANS_SB_RBMBLOCKS		0x00000400
#define	XFS_TRANS_SB_RBLOCKS		0x00000800
#define	XFS_TRANS_SB_REXTENTS		0x00001000
#define	XFS_TRANS_SB_REXTSLOG		0x00002000

/*
 * Here we centralize the specification of XFS meta-data buffer reference count
 * values.  This determines how hard the buffer cache tries to hold onto the
 * buffer.
 */
#define	XFS_AGF_REF		4
#define	XFS_AGI_REF		4
#define	XFS_AGFL_REF		3
#define	XFS_INO_BTREE_REF	3
#define	XFS_ALLOC_BTREE_REF	2
#define	XFS_BMAP_BTREE_REF	2
#define	XFS_DIR_BTREE_REF	2
#define	XFS_INO_REF		2
#define	XFS_ATTR_BTREE_REF	1
#define	XFS_DQUOT_REF		1

/*
 * Flags for xfs_trans_ichgtime().
 */
#define	XFS_ICHGTIME_MOD	0x1	/* data fork modification timestamp */
#define	XFS_ICHGTIME_CHG	0x2	/* inode field change timestamp */
#define	XFS_ICHGTIME_CREATE	0x4	/* inode create timestamp */


/*
 * Symlink decoding/encoding functions
 */
int xfs_symlink_blocks(struct xfs_mount *mp, int pathlen);
int xfs_symlink_hdr_set(struct xfs_mount *mp, xfs_ino_t ino, uint32_t offset,
			uint32_t size, struct xfs_buf *bp);
bool xfs_symlink_hdr_ok(xfs_ino_t ino, uint32_t offset,
			uint32_t size, struct xfs_buf *bp);
void xfs_symlink_local_to_remote(struct xfs_trans *tp, struct xfs_buf *bp,
				 struct xfs_inode *ip, struct xfs_ifork *ifp);

#endif /* __XFS_SHARED_H__ */