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70a9883c DC |
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 | */ | |
26 | struct xfs_ifork; | |
27 | struct xfs_buf; | |
28 | struct xfs_buf_ops; | |
29 | struct xfs_mount; | |
30 | struct xfs_trans; | |
31 | struct xfs_inode; | |
32 | ||
33 | /* | |
34 | * Buffer verifier operations are widely used, including userspace tools | |
35 | */ | |
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; | |
035e00ac | 41 | extern const struct xfs_buf_ops xfs_rmapbt_buf_ops; |
1946b91c | 42 | extern const struct xfs_buf_ops xfs_refcountbt_buf_ops; |
70a9883c DC |
43 | extern const struct xfs_buf_ops xfs_attr3_leaf_buf_ops; |
44 | extern const struct xfs_buf_ops xfs_attr3_rmt_buf_ops; | |
45 | extern const struct xfs_buf_ops xfs_bmbt_buf_ops; | |
46 | extern const struct xfs_buf_ops xfs_da3_node_buf_ops; | |
47 | extern const struct xfs_buf_ops xfs_dquot_buf_ops; | |
48 | extern const struct xfs_buf_ops xfs_symlink_buf_ops; | |
49 | extern const struct xfs_buf_ops xfs_agi_buf_ops; | |
50 | extern const struct xfs_buf_ops xfs_inobt_buf_ops; | |
51 | extern const struct xfs_buf_ops xfs_inode_buf_ops; | |
52 | extern const struct xfs_buf_ops xfs_inode_buf_ra_ops; | |
53 | extern const struct xfs_buf_ops xfs_dquot_buf_ops; | |
7d6a13f0 | 54 | extern const struct xfs_buf_ops xfs_dquot_buf_ra_ops; |
70a9883c DC |
55 | extern const struct xfs_buf_ops xfs_sb_buf_ops; |
56 | extern const struct xfs_buf_ops xfs_sb_quiet_buf_ops; | |
57 | extern const struct xfs_buf_ops xfs_symlink_buf_ops; | |
bf85e099 | 58 | extern const struct xfs_buf_ops xfs_rtbuf_ops; |
70a9883c | 59 | |
70a9883c DC |
60 | /* |
61 | * This structure is used to track log items associated with | |
62 | * a transaction. It points to the log item and keeps some | |
63 | * flags to track the state of the log item. It also tracks | |
64 | * the amount of space needed to log the item it describes | |
65 | * once we get to commit processing (see xfs_trans_commit()). | |
66 | */ | |
67 | struct xfs_log_item_desc { | |
68 | struct xfs_log_item *lid_item; | |
69 | struct list_head lid_trans; | |
70 | unsigned char lid_flags; | |
71 | }; | |
72 | ||
73 | #define XFS_LID_DIRTY 0x1 | |
74 | ||
75 | /* log size calculation functions */ | |
76 | int xfs_log_calc_unit_res(struct xfs_mount *mp, int unit_bytes); | |
77 | int xfs_log_calc_minimum_size(struct xfs_mount *); | |
78 | ||
b872af2c DW |
79 | struct xfs_trans_res; |
80 | void xfs_log_get_max_trans_res(struct xfs_mount *mp, | |
81 | struct xfs_trans_res *max_resp); | |
70a9883c DC |
82 | |
83 | /* | |
84 | * Values for t_flags. | |
85 | */ | |
86 | #define XFS_TRANS_DIRTY 0x01 /* something needs to be logged */ | |
87 | #define XFS_TRANS_SB_DIRTY 0x02 /* superblock is modified */ | |
88 | #define XFS_TRANS_PERM_LOG_RES 0x04 /* xact took a permanent log res */ | |
89 | #define XFS_TRANS_SYNC 0x08 /* make commit synchronous */ | |
90 | #define XFS_TRANS_DQ_DIRTY 0x10 /* at least one dquot in trx dirty */ | |
91 | #define XFS_TRANS_RESERVE 0x20 /* OK to use reserved data blocks */ | |
253f4911 CH |
92 | #define XFS_TRANS_NO_WRITECOUNT 0x40 /* do not elevate SB writecount */ |
93 | #define XFS_TRANS_NOFS 0x80 /* pass KM_NOFS to kmem_alloc */ | |
94 | ||
70a9883c DC |
95 | /* |
96 | * Field values for xfs_trans_mod_sb. | |
97 | */ | |
98 | #define XFS_TRANS_SB_ICOUNT 0x00000001 | |
99 | #define XFS_TRANS_SB_IFREE 0x00000002 | |
100 | #define XFS_TRANS_SB_FDBLOCKS 0x00000004 | |
101 | #define XFS_TRANS_SB_RES_FDBLOCKS 0x00000008 | |
102 | #define XFS_TRANS_SB_FREXTENTS 0x00000010 | |
103 | #define XFS_TRANS_SB_RES_FREXTENTS 0x00000020 | |
104 | #define XFS_TRANS_SB_DBLOCKS 0x00000040 | |
105 | #define XFS_TRANS_SB_AGCOUNT 0x00000080 | |
106 | #define XFS_TRANS_SB_IMAXPCT 0x00000100 | |
107 | #define XFS_TRANS_SB_REXTSIZE 0x00000200 | |
108 | #define XFS_TRANS_SB_RBMBLOCKS 0x00000400 | |
109 | #define XFS_TRANS_SB_RBLOCKS 0x00000800 | |
110 | #define XFS_TRANS_SB_REXTENTS 0x00001000 | |
111 | #define XFS_TRANS_SB_REXTSLOG 0x00002000 | |
112 | ||
113 | /* | |
114 | * Here we centralize the specification of XFS meta-data buffer reference count | |
115 | * values. This determines how hard the buffer cache tries to hold onto the | |
116 | * buffer. | |
117 | */ | |
118 | #define XFS_AGF_REF 4 | |
119 | #define XFS_AGI_REF 4 | |
120 | #define XFS_AGFL_REF 3 | |
121 | #define XFS_INO_BTREE_REF 3 | |
122 | #define XFS_ALLOC_BTREE_REF 2 | |
123 | #define XFS_BMAP_BTREE_REF 2 | |
035e00ac | 124 | #define XFS_RMAP_BTREE_REF 2 |
70a9883c DC |
125 | #define XFS_DIR_BTREE_REF 2 |
126 | #define XFS_INO_REF 2 | |
127 | #define XFS_ATTR_BTREE_REF 1 | |
128 | #define XFS_DQUOT_REF 1 | |
1946b91c | 129 | #define XFS_REFC_BTREE_REF 1 |
70a9883c DC |
130 | |
131 | /* | |
132 | * Flags for xfs_trans_ichgtime(). | |
133 | */ | |
134 | #define XFS_ICHGTIME_MOD 0x1 /* data fork modification timestamp */ | |
135 | #define XFS_ICHGTIME_CHG 0x2 /* inode field change timestamp */ | |
136 | #define XFS_ICHGTIME_CREATE 0x4 /* inode create timestamp */ | |
137 | ||
138 | ||
139 | /* | |
140 | * Symlink decoding/encoding functions | |
141 | */ | |
142 | int xfs_symlink_blocks(struct xfs_mount *mp, int pathlen); | |
143 | int xfs_symlink_hdr_set(struct xfs_mount *mp, xfs_ino_t ino, uint32_t offset, | |
144 | uint32_t size, struct xfs_buf *bp); | |
bda65ef8 | 145 | bool xfs_symlink_hdr_ok(xfs_ino_t ino, uint32_t offset, |
70a9883c DC |
146 | uint32_t size, struct xfs_buf *bp); |
147 | void xfs_symlink_local_to_remote(struct xfs_trans *tp, struct xfs_buf *bp, | |
148 | struct xfs_inode *ip, struct xfs_ifork *ifp); | |
0795e004 | 149 | xfs_failaddr_t xfs_symlink_shortform_verify(struct xfs_inode *ip); |
70a9883c DC |
150 | |
151 | #endif /* __XFS_SHARED_H__ */ |