2 * Copyright (c) 2000-2005 Silicon Graphics, Inc.
3 * Copyright (c) 2013 Red Hat, Inc.
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.
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.
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
19 #ifndef __XFS_SHARED_H__
20 #define __XFS_SHARED_H__
23 * Definitions shared between kernel and userspace that don't fit into any other
24 * header file that is shared with userspace.
34 * Buffer verifier operations are widely used, including userspace tools
36 extern const struct xfs_buf_ops xfs_agf_buf_ops;
37 extern const struct xfs_buf_ops xfs_agi_buf_ops;
38 extern const struct xfs_buf_ops xfs_agf_buf_ops;
39 extern const struct xfs_buf_ops xfs_agfl_buf_ops;
40 extern const struct xfs_buf_ops xfs_allocbt_buf_ops;
41 extern const struct xfs_buf_ops xfs_attr3_leaf_buf_ops;
42 extern const struct xfs_buf_ops xfs_attr3_rmt_buf_ops;
43 extern const struct xfs_buf_ops xfs_bmbt_buf_ops;
44 extern const struct xfs_buf_ops xfs_da3_node_buf_ops;
45 extern const struct xfs_buf_ops xfs_dquot_buf_ops;
46 extern const struct xfs_buf_ops xfs_symlink_buf_ops;
47 extern const struct xfs_buf_ops xfs_agi_buf_ops;
48 extern const struct xfs_buf_ops xfs_inobt_buf_ops;
49 extern const struct xfs_buf_ops xfs_inode_buf_ops;
50 extern const struct xfs_buf_ops xfs_inode_buf_ra_ops;
51 extern const struct xfs_buf_ops xfs_dquot_buf_ops;
52 extern const struct xfs_buf_ops xfs_sb_buf_ops;
53 extern const struct xfs_buf_ops xfs_sb_quiet_buf_ops;
54 extern const struct xfs_buf_ops xfs_symlink_buf_ops;
57 * Transaction types. Used to distinguish types of buffers. These never reach
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
87 * Dummy entries since we use the transaction type to index into the
88 * trans_type[] in xlog_recover_print_trans_head()
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) */
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" }
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()).
161 struct xfs_log_item_desc {
162 struct xfs_log_item *lid_item;
163 struct list_head lid_trans;
164 unsigned char lid_flags;
167 #define XFS_LID_DIRTY 0x1
169 /* log size calculation functions */
170 int xfs_log_calc_unit_res(struct xfs_mount *mp, int unit_bytes);
171 int xfs_log_calc_minimum_size(struct xfs_mount *);
175 * Values for t_flags.
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 */
186 * Values for call flags parameter.
188 #define XFS_TRANS_RELEASE_LOG_RES 0x4
189 #define XFS_TRANS_ABORT 0x8
192 * Field values for xfs_trans_mod_sb.
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
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
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
226 * Flags for xfs_trans_ichgtime().
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 */
234 * Symlink decoding/encoding functions
236 int xfs_symlink_blocks(struct xfs_mount *mp, int pathlen);
237 int xfs_symlink_hdr_set(struct xfs_mount *mp, xfs_ino_t ino, uint32_t offset,
238 uint32_t size, struct xfs_buf *bp);
239 bool xfs_symlink_hdr_ok(struct xfs_mount *mp, xfs_ino_t ino, uint32_t offset,
240 uint32_t size, struct xfs_buf *bp);
241 void xfs_symlink_local_to_remote(struct xfs_trans *tp, struct xfs_buf *bp,
242 struct xfs_inode *ip, struct xfs_ifork *ifp);
244 #endif /* __XFS_SHARED_H__ */