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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_dquot_buf_ra_ops;
53extern const struct xfs_buf_ops xfs_sb_buf_ops;
54extern const struct xfs_buf_ops xfs_sb_quiet_buf_ops;
55extern const struct xfs_buf_ops xfs_symlink_buf_ops;
56extern const struct xfs_buf_ops xfs_rtbuf_ops;
57
58/*
59 * Transaction types. Used to distinguish types of buffers. These never reach
60 * the log.
61 */
62#define XFS_TRANS_SETATTR_NOT_SIZE 1
63#define XFS_TRANS_SETATTR_SIZE 2
64#define XFS_TRANS_INACTIVE 3
65#define XFS_TRANS_CREATE 4
66#define XFS_TRANS_CREATE_TRUNC 5
67#define XFS_TRANS_TRUNCATE_FILE 6
68#define XFS_TRANS_REMOVE 7
69#define XFS_TRANS_LINK 8
70#define XFS_TRANS_RENAME 9
71#define XFS_TRANS_MKDIR 10
72#define XFS_TRANS_RMDIR 11
73#define XFS_TRANS_SYMLINK 12
74#define XFS_TRANS_SET_DMATTRS 13
75#define XFS_TRANS_GROWFS 14
76#define XFS_TRANS_STRAT_WRITE 15
77#define XFS_TRANS_DIOSTRAT 16
78/* 17 was XFS_TRANS_WRITE_SYNC */
79#define XFS_TRANS_WRITEID 18
80#define XFS_TRANS_ADDAFORK 19
81#define XFS_TRANS_ATTRINVAL 20
82#define XFS_TRANS_ATRUNCATE 21
83#define XFS_TRANS_ATTR_SET 22
84#define XFS_TRANS_ATTR_RM 23
85#define XFS_TRANS_ATTR_FLAG 24
86#define XFS_TRANS_CLEAR_AGI_BUCKET 25
87#define XFS_TRANS_SB_CHANGE 26
88/*
89 * Dummy entries since we use the transaction type to index into the
90 * trans_type[] in xlog_recover_print_trans_head()
91 */
92#define XFS_TRANS_DUMMY1 27
93#define XFS_TRANS_DUMMY2 28
94#define XFS_TRANS_QM_QUOTAOFF 29
95#define XFS_TRANS_QM_DQALLOC 30
96#define XFS_TRANS_QM_SETQLIM 31
97#define XFS_TRANS_QM_DQCLUSTER 32
98#define XFS_TRANS_QM_QINOCREATE 33
99#define XFS_TRANS_QM_QUOTAOFF_END 34
100#define XFS_TRANS_FSYNC_TS 35
101#define XFS_TRANS_GROWFSRT_ALLOC 36
102#define XFS_TRANS_GROWFSRT_ZERO 37
103#define XFS_TRANS_GROWFSRT_FREE 38
104#define XFS_TRANS_SWAPEXT 39
105#define XFS_TRANS_CHECKPOINT 40
106#define XFS_TRANS_ICREATE 41
107#define XFS_TRANS_CREATE_TMPFILE 42
108#define XFS_TRANS_TYPE_MAX 43
109/* new transaction types need to be reflected in xfs_logprint(8) */
110
111#define XFS_TRANS_TYPES \
112 { XFS_TRANS_SETATTR_NOT_SIZE, "SETATTR_NOT_SIZE" }, \
113 { XFS_TRANS_SETATTR_SIZE, "SETATTR_SIZE" }, \
114 { XFS_TRANS_INACTIVE, "INACTIVE" }, \
115 { XFS_TRANS_CREATE, "CREATE" }, \
116 { XFS_TRANS_CREATE_TRUNC, "CREATE_TRUNC" }, \
117 { XFS_TRANS_TRUNCATE_FILE, "TRUNCATE_FILE" }, \
118 { XFS_TRANS_REMOVE, "REMOVE" }, \
119 { XFS_TRANS_LINK, "LINK" }, \
120 { XFS_TRANS_RENAME, "RENAME" }, \
121 { XFS_TRANS_MKDIR, "MKDIR" }, \
122 { XFS_TRANS_RMDIR, "RMDIR" }, \
123 { XFS_TRANS_SYMLINK, "SYMLINK" }, \
124 { XFS_TRANS_SET_DMATTRS, "SET_DMATTRS" }, \
125 { XFS_TRANS_GROWFS, "GROWFS" }, \
126 { XFS_TRANS_STRAT_WRITE, "STRAT_WRITE" }, \
127 { XFS_TRANS_DIOSTRAT, "DIOSTRAT" }, \
128 { XFS_TRANS_WRITEID, "WRITEID" }, \
129 { XFS_TRANS_ADDAFORK, "ADDAFORK" }, \
130 { XFS_TRANS_ATTRINVAL, "ATTRINVAL" }, \
131 { XFS_TRANS_ATRUNCATE, "ATRUNCATE" }, \
132 { XFS_TRANS_ATTR_SET, "ATTR_SET" }, \
133 { XFS_TRANS_ATTR_RM, "ATTR_RM" }, \
134 { XFS_TRANS_ATTR_FLAG, "ATTR_FLAG" }, \
135 { XFS_TRANS_CLEAR_AGI_BUCKET, "CLEAR_AGI_BUCKET" }, \
136 { XFS_TRANS_SB_CHANGE, "SBCHANGE" }, \
137 { XFS_TRANS_DUMMY1, "DUMMY1" }, \
138 { XFS_TRANS_DUMMY2, "DUMMY2" }, \
139 { XFS_TRANS_QM_QUOTAOFF, "QM_QUOTAOFF" }, \
140 { XFS_TRANS_QM_DQALLOC, "QM_DQALLOC" }, \
141 { XFS_TRANS_QM_SETQLIM, "QM_SETQLIM" }, \
142 { XFS_TRANS_QM_DQCLUSTER, "QM_DQCLUSTER" }, \
143 { XFS_TRANS_QM_QINOCREATE, "QM_QINOCREATE" }, \
144 { XFS_TRANS_QM_QUOTAOFF_END, "QM_QOFF_END" }, \
145 { XFS_TRANS_FSYNC_TS, "FSYNC_TS" }, \
146 { XFS_TRANS_GROWFSRT_ALLOC, "GROWFSRT_ALLOC" }, \
147 { XFS_TRANS_GROWFSRT_ZERO, "GROWFSRT_ZERO" }, \
148 { XFS_TRANS_GROWFSRT_FREE, "GROWFSRT_FREE" }, \
149 { XFS_TRANS_SWAPEXT, "SWAPEXT" }, \
150 { XFS_TRANS_CHECKPOINT, "CHECKPOINT" }, \
151 { XFS_TRANS_ICREATE, "ICREATE" }, \
152 { XFS_TRANS_CREATE_TMPFILE, "CREATE_TMPFILE" }, \
153 { XLOG_UNMOUNT_REC_TYPE, "UNMOUNT" }
154
155/*
156 * This structure is used to track log items associated with
157 * a transaction. It points to the log item and keeps some
158 * flags to track the state of the log item. It also tracks
159 * the amount of space needed to log the item it describes
160 * once we get to commit processing (see xfs_trans_commit()).
161 */
162struct xfs_log_item_desc {
163 struct xfs_log_item *lid_item;
164 struct list_head lid_trans;
165 unsigned char lid_flags;
166};
167
168#define XFS_LID_DIRTY 0x1
169
170/* log size calculation functions */
171int xfs_log_calc_unit_res(struct xfs_mount *mp, int unit_bytes);
172int xfs_log_calc_minimum_size(struct xfs_mount *);
173
174
175/*
176 * Values for t_flags.
177 */
178#define XFS_TRANS_DIRTY 0x01 /* something needs to be logged */
179#define XFS_TRANS_SB_DIRTY 0x02 /* superblock is modified */
180#define XFS_TRANS_PERM_LOG_RES 0x04 /* xact took a permanent log res */
181#define XFS_TRANS_SYNC 0x08 /* make commit synchronous */
182#define XFS_TRANS_DQ_DIRTY 0x10 /* at least one dquot in trx dirty */
183#define XFS_TRANS_RESERVE 0x20 /* OK to use reserved data blocks */
184#define XFS_TRANS_FREEZE_PROT 0x40 /* Transaction has elevated writer
185 count in superblock */
186/*
187 * Field values for xfs_trans_mod_sb.
188 */
189#define XFS_TRANS_SB_ICOUNT 0x00000001
190#define XFS_TRANS_SB_IFREE 0x00000002
191#define XFS_TRANS_SB_FDBLOCKS 0x00000004
192#define XFS_TRANS_SB_RES_FDBLOCKS 0x00000008
193#define XFS_TRANS_SB_FREXTENTS 0x00000010
194#define XFS_TRANS_SB_RES_FREXTENTS 0x00000020
195#define XFS_TRANS_SB_DBLOCKS 0x00000040
196#define XFS_TRANS_SB_AGCOUNT 0x00000080
197#define XFS_TRANS_SB_IMAXPCT 0x00000100
198#define XFS_TRANS_SB_REXTSIZE 0x00000200
199#define XFS_TRANS_SB_RBMBLOCKS 0x00000400
200#define XFS_TRANS_SB_RBLOCKS 0x00000800
201#define XFS_TRANS_SB_REXTENTS 0x00001000
202#define XFS_TRANS_SB_REXTSLOG 0x00002000
203
204/*
205 * Here we centralize the specification of XFS meta-data buffer reference count
206 * values. This determines how hard the buffer cache tries to hold onto the
207 * buffer.
208 */
209#define XFS_AGF_REF 4
210#define XFS_AGI_REF 4
211#define XFS_AGFL_REF 3
212#define XFS_INO_BTREE_REF 3
213#define XFS_ALLOC_BTREE_REF 2
214#define XFS_BMAP_BTREE_REF 2
215#define XFS_DIR_BTREE_REF 2
216#define XFS_INO_REF 2
217#define XFS_ATTR_BTREE_REF 1
218#define XFS_DQUOT_REF 1
219
220/*
221 * Flags for xfs_trans_ichgtime().
222 */
223#define XFS_ICHGTIME_MOD 0x1 /* data fork modification timestamp */
224#define XFS_ICHGTIME_CHG 0x2 /* inode field change timestamp */
225#define XFS_ICHGTIME_CREATE 0x4 /* inode create timestamp */
226
227
228/*
229 * Symlink decoding/encoding functions
230 */
231int xfs_symlink_blocks(struct xfs_mount *mp, int pathlen);
232int xfs_symlink_hdr_set(struct xfs_mount *mp, xfs_ino_t ino, uint32_t offset,
233 uint32_t size, struct xfs_buf *bp);
234bool xfs_symlink_hdr_ok(xfs_ino_t ino, uint32_t offset,
235 uint32_t size, struct xfs_buf *bp);
236void xfs_symlink_local_to_remote(struct xfs_trans *tp, struct xfs_buf *bp,
237 struct xfs_inode *ip, struct xfs_ifork *ifp);
238
239#endif /* __XFS_SHARED_H__ */
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright (c) 2000-2005 Silicon Graphics, Inc.
4 * Copyright (c) 2013 Red Hat, Inc.
5 * All Rights Reserved.
6 */
7#ifndef __XFS_SHARED_H__
8#define __XFS_SHARED_H__
9
10/*
11 * Definitions shared between kernel and userspace that don't fit into any other
12 * header file that is shared with userspace.
13 */
14struct xfs_ifork;
15struct xfs_buf;
16struct xfs_buf_ops;
17struct xfs_mount;
18struct xfs_trans;
19struct xfs_inode;
20
21/*
22 * Buffer verifier operations are widely used, including userspace tools
23 */
24extern const struct xfs_buf_ops xfs_agf_buf_ops;
25extern const struct xfs_buf_ops xfs_agfl_buf_ops;
26extern const struct xfs_buf_ops xfs_agi_buf_ops;
27extern const struct xfs_buf_ops xfs_attr3_leaf_buf_ops;
28extern const struct xfs_buf_ops xfs_attr3_rmt_buf_ops;
29extern const struct xfs_buf_ops xfs_bmbt_buf_ops;
30extern const struct xfs_buf_ops xfs_bnobt_buf_ops;
31extern const struct xfs_buf_ops xfs_cntbt_buf_ops;
32extern const struct xfs_buf_ops xfs_da3_node_buf_ops;
33extern const struct xfs_buf_ops xfs_dquot_buf_ops;
34extern const struct xfs_buf_ops xfs_dquot_buf_ra_ops;
35extern const struct xfs_buf_ops xfs_finobt_buf_ops;
36extern const struct xfs_buf_ops xfs_inobt_buf_ops;
37extern const struct xfs_buf_ops xfs_inode_buf_ops;
38extern const struct xfs_buf_ops xfs_inode_buf_ra_ops;
39extern const struct xfs_buf_ops xfs_refcountbt_buf_ops;
40extern const struct xfs_buf_ops xfs_rmapbt_buf_ops;
41extern const struct xfs_buf_ops xfs_rtbuf_ops;
42extern const struct xfs_buf_ops xfs_sb_buf_ops;
43extern const struct xfs_buf_ops xfs_sb_quiet_buf_ops;
44extern const struct xfs_buf_ops xfs_symlink_buf_ops;
45
46/* log size calculation functions */
47int xfs_log_calc_unit_res(struct xfs_mount *mp, int unit_bytes);
48int xfs_log_calc_minimum_size(struct xfs_mount *);
49
50struct xfs_trans_res;
51void xfs_log_get_max_trans_res(struct xfs_mount *mp,
52 struct xfs_trans_res *max_resp);
53
54/*
55 * Values for t_flags.
56 */
57/* Transaction needs to be logged */
58#define XFS_TRANS_DIRTY (1u << 0)
59/* Superblock is dirty and needs to be logged */
60#define XFS_TRANS_SB_DIRTY (1u << 1)
61/* Transaction took a permanent log reservation */
62#define XFS_TRANS_PERM_LOG_RES (1u << 2)
63/* Synchronous transaction commit needed */
64#define XFS_TRANS_SYNC (1u << 3)
65/* Transaction can use reserve block pool */
66#define XFS_TRANS_RESERVE (1u << 4)
67/* Transaction should avoid VFS level superblock write accounting */
68#define XFS_TRANS_NO_WRITECOUNT (1u << 5)
69/* Transaction has freed blocks returned to it's reservation */
70#define XFS_TRANS_RES_FDBLKS (1u << 6)
71/* Transaction contains an intent done log item */
72#define XFS_TRANS_HAS_INTENT_DONE (1u << 7)
73
74/*
75 * LOWMODE is used by the allocator to activate the lowspace algorithm - when
76 * free space is running low the extent allocator may choose to allocate an
77 * extent from an AG without leaving sufficient space for a btree split when
78 * inserting the new extent. In this case the allocator will enable the
79 * lowspace algorithm which is supposed to allow further allocations (such as
80 * btree splits and newroots) to allocate from sequential AGs. In order to
81 * avoid locking AGs out of order the lowspace algorithm will start searching
82 * for free space from AG 0. If the correct transaction reservations have been
83 * made then this algorithm will eventually find all the space it needs.
84 */
85#define XFS_TRANS_LOWMODE 0x100 /* allocate in low space mode */
86
87/*
88 * Field values for xfs_trans_mod_sb.
89 */
90#define XFS_TRANS_SB_ICOUNT 0x00000001
91#define XFS_TRANS_SB_IFREE 0x00000002
92#define XFS_TRANS_SB_FDBLOCKS 0x00000004
93#define XFS_TRANS_SB_RES_FDBLOCKS 0x00000008
94#define XFS_TRANS_SB_FREXTENTS 0x00000010
95#define XFS_TRANS_SB_RES_FREXTENTS 0x00000020
96#define XFS_TRANS_SB_DBLOCKS 0x00000040
97#define XFS_TRANS_SB_AGCOUNT 0x00000080
98#define XFS_TRANS_SB_IMAXPCT 0x00000100
99#define XFS_TRANS_SB_REXTSIZE 0x00000200
100#define XFS_TRANS_SB_RBMBLOCKS 0x00000400
101#define XFS_TRANS_SB_RBLOCKS 0x00000800
102#define XFS_TRANS_SB_REXTENTS 0x00001000
103#define XFS_TRANS_SB_REXTSLOG 0x00002000
104
105/*
106 * Here we centralize the specification of XFS meta-data buffer reference count
107 * values. This determines how hard the buffer cache tries to hold onto the
108 * buffer.
109 */
110#define XFS_AGF_REF 4
111#define XFS_AGI_REF 4
112#define XFS_AGFL_REF 3
113#define XFS_INO_BTREE_REF 3
114#define XFS_ALLOC_BTREE_REF 2
115#define XFS_BMAP_BTREE_REF 2
116#define XFS_RMAP_BTREE_REF 2
117#define XFS_DIR_BTREE_REF 2
118#define XFS_INO_REF 2
119#define XFS_ATTR_BTREE_REF 1
120#define XFS_DQUOT_REF 1
121#define XFS_REFC_BTREE_REF 1
122#define XFS_SSB_REF 0
123
124/*
125 * Flags for xfs_trans_ichgtime().
126 */
127#define XFS_ICHGTIME_MOD 0x1 /* data fork modification timestamp */
128#define XFS_ICHGTIME_CHG 0x2 /* inode field change timestamp */
129#define XFS_ICHGTIME_CREATE 0x4 /* inode create timestamp */
130
131
132/*
133 * Symlink decoding/encoding functions
134 */
135int xfs_symlink_blocks(struct xfs_mount *mp, int pathlen);
136int xfs_symlink_hdr_set(struct xfs_mount *mp, xfs_ino_t ino, uint32_t offset,
137 uint32_t size, struct xfs_buf *bp);
138bool xfs_symlink_hdr_ok(xfs_ino_t ino, uint32_t offset,
139 uint32_t size, struct xfs_buf *bp);
140void xfs_symlink_local_to_remote(struct xfs_trans *tp, struct xfs_buf *bp,
141 struct xfs_inode *ip, struct xfs_ifork *ifp);
142xfs_failaddr_t xfs_symlink_shortform_verify(struct xfs_inode *ip);
143
144/* Computed inode geometry for the filesystem. */
145struct xfs_ino_geometry {
146 /* Maximum inode count in this filesystem. */
147 uint64_t maxicount;
148
149 /* Actual inode cluster buffer size, in bytes. */
150 unsigned int inode_cluster_size;
151
152 /*
153 * Desired inode cluster buffer size, in bytes. This value is not
154 * rounded up to at least one filesystem block, which is necessary for
155 * the sole purpose of validating sb_spino_align. Runtime code must
156 * only ever use inode_cluster_size.
157 */
158 unsigned int inode_cluster_size_raw;
159
160 /* Inode cluster sizes, adjusted to be at least 1 fsb. */
161 unsigned int inodes_per_cluster;
162 unsigned int blocks_per_cluster;
163
164 /* Inode cluster alignment. */
165 unsigned int cluster_align;
166 unsigned int cluster_align_inodes;
167 unsigned int inoalign_mask; /* mask sb_inoalignmt if used */
168
169 unsigned int inobt_mxr[2]; /* max inobt btree records */
170 unsigned int inobt_mnr[2]; /* min inobt btree records */
171 unsigned int inobt_maxlevels; /* max inobt btree levels. */
172
173 /* Size of inode allocations under normal operation. */
174 unsigned int ialloc_inos;
175 unsigned int ialloc_blks;
176
177 /* Minimum inode blocks for a sparse allocation. */
178 unsigned int ialloc_min_blks;
179
180 /* stripe unit inode alignment */
181 unsigned int ialloc_align;
182
183 unsigned int agino_log; /* #bits for agino in inum */
184
185 /* precomputed default inode attribute fork offset */
186 unsigned int attr_fork_offset;
187
188 /* precomputed value for di_flags2 */
189 uint64_t new_diflags2;
190
191};
192
193#endif /* __XFS_SHARED_H__ */