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1da177e4 | 1 | /* |
7b718769 NS |
2 | * Copyright (c) 2000-2003,2005 Silicon Graphics, Inc. |
3 | * All Rights Reserved. | |
1da177e4 | 4 | * |
7b718769 NS |
5 | * This program is free software; you can redistribute it and/or |
6 | * modify it under the terms of the GNU General Public License as | |
1da177e4 LT |
7 | * published by the Free Software Foundation. |
8 | * | |
7b718769 NS |
9 | * This program is distributed in the hope that it would be useful, |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
1da177e4 | 13 | * |
7b718769 NS |
14 | * You should have received a copy of the GNU General Public License |
15 | * along with this program; if not, write the Free Software Foundation, | |
16 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
1da177e4 LT |
17 | */ |
18 | #ifndef __XFS_RTALLOC_H__ | |
19 | #define __XFS_RTALLOC_H__ | |
20 | ||
c7298202 DC |
21 | /* kernel only definitions and functions */ |
22 | ||
1da177e4 LT |
23 | struct xfs_mount; |
24 | struct xfs_trans; | |
25 | ||
fb3c3de2 DW |
26 | struct xfs_rtalloc_rec { |
27 | xfs_rtblock_t ar_startblock; | |
28 | xfs_rtblock_t ar_blockcount; | |
29 | }; | |
30 | ||
31 | typedef int (*xfs_rtalloc_query_range_fn)( | |
32 | struct xfs_trans *tp, | |
33 | struct xfs_rtalloc_rec *rec, | |
34 | void *priv); | |
35 | ||
1da177e4 LT |
36 | #ifdef CONFIG_XFS_RT |
37 | /* | |
38 | * Function prototypes for exported functions. | |
39 | */ | |
40 | ||
41 | /* | |
42 | * Allocate an extent in the realtime subvolume, with the usual allocation | |
43 | * parameters. The length units are all in realtime extents, as is the | |
44 | * result block number. | |
45 | */ | |
46 | int /* error */ | |
47 | xfs_rtallocate_extent( | |
48 | struct xfs_trans *tp, /* transaction pointer */ | |
49 | xfs_rtblock_t bno, /* starting block number to allocate */ | |
50 | xfs_extlen_t minlen, /* minimum length to allocate */ | |
51 | xfs_extlen_t maxlen, /* maximum length to allocate */ | |
52 | xfs_extlen_t *len, /* out: actual length allocated */ | |
1da177e4 LT |
53 | int wasdel, /* was a delayed allocation extent */ |
54 | xfs_extlen_t prod, /* extent product factor */ | |
55 | xfs_rtblock_t *rtblock); /* out: start block allocated */ | |
56 | ||
57 | /* | |
58 | * Free an extent in the realtime subvolume. Length is expressed in | |
59 | * realtime extents, as is the block number. | |
60 | */ | |
61 | int /* error */ | |
62 | xfs_rtfree_extent( | |
63 | struct xfs_trans *tp, /* transaction pointer */ | |
64 | xfs_rtblock_t bno, /* starting block number to free */ | |
65 | xfs_extlen_t len); /* length of extent freed */ | |
66 | ||
67 | /* | |
68 | * Initialize realtime fields in the mount structure. | |
69 | */ | |
70 | int /* error */ | |
71 | xfs_rtmount_init( | |
72 | struct xfs_mount *mp); /* file system mount structure */ | |
b93b6e43 CH |
73 | void |
74 | xfs_rtunmount_inodes( | |
75 | struct xfs_mount *mp); | |
1da177e4 LT |
76 | |
77 | /* | |
78 | * Get the bitmap and summary inodes into the mount structure | |
79 | * at mount time. | |
80 | */ | |
81 | int /* error */ | |
82 | xfs_rtmount_inodes( | |
83 | struct xfs_mount *mp); /* file system mount structure */ | |
84 | ||
85 | /* | |
86 | * Pick an extent for allocation at the start of a new realtime file. | |
87 | * Use the sequence number stored in the atime field of the bitmap inode. | |
88 | * Translate this to a fraction of the rtextents, and return the product | |
89 | * of rtextents and the fraction. | |
90 | * The fraction sequence is 0, 1/2, 1/4, 3/4, 1/8, ..., 7/8, 1/16, ... | |
91 | */ | |
92 | int /* error */ | |
93 | xfs_rtpick_extent( | |
94 | struct xfs_mount *mp, /* file system mount point */ | |
95 | struct xfs_trans *tp, /* transaction pointer */ | |
96 | xfs_extlen_t len, /* allocation length (rtextents) */ | |
97 | xfs_rtblock_t *pick); /* result rt extent */ | |
98 | ||
1da177e4 LT |
99 | /* |
100 | * Grow the realtime area of the filesystem. | |
101 | */ | |
102 | int | |
103 | xfs_growfs_rt( | |
104 | struct xfs_mount *mp, /* file system mount structure */ | |
105 | xfs_growfs_rt_t *in); /* user supplied growfs struct */ | |
106 | ||
c963c619 DC |
107 | /* |
108 | * From xfs_rtbitmap.c | |
109 | */ | |
26788097 DW |
110 | int xfs_rtbuf_get(struct xfs_mount *mp, struct xfs_trans *tp, |
111 | xfs_rtblock_t block, int issum, struct xfs_buf **bpp); | |
c963c619 DC |
112 | int xfs_rtcheck_range(struct xfs_mount *mp, struct xfs_trans *tp, |
113 | xfs_rtblock_t start, xfs_extlen_t len, int val, | |
114 | xfs_rtblock_t *new, int *stat); | |
115 | int xfs_rtfind_back(struct xfs_mount *mp, struct xfs_trans *tp, | |
116 | xfs_rtblock_t start, xfs_rtblock_t limit, | |
117 | xfs_rtblock_t *rtblock); | |
118 | int xfs_rtfind_forw(struct xfs_mount *mp, struct xfs_trans *tp, | |
119 | xfs_rtblock_t start, xfs_rtblock_t limit, | |
120 | xfs_rtblock_t *rtblock); | |
121 | int xfs_rtmodify_range(struct xfs_mount *mp, struct xfs_trans *tp, | |
122 | xfs_rtblock_t start, xfs_extlen_t len, int val); | |
afabfd30 ES |
123 | int xfs_rtmodify_summary_int(struct xfs_mount *mp, struct xfs_trans *tp, |
124 | int log, xfs_rtblock_t bbno, int delta, | |
125 | xfs_buf_t **rbpp, xfs_fsblock_t *rsb, | |
126 | xfs_suminfo_t *sum); | |
c963c619 DC |
127 | int xfs_rtmodify_summary(struct xfs_mount *mp, struct xfs_trans *tp, int log, |
128 | xfs_rtblock_t bbno, int delta, xfs_buf_t **rbpp, | |
129 | xfs_fsblock_t *rsb); | |
130 | int xfs_rtfree_range(struct xfs_mount *mp, struct xfs_trans *tp, | |
131 | xfs_rtblock_t start, xfs_extlen_t len, | |
132 | struct xfs_buf **rbpp, xfs_fsblock_t *rsb); | |
fb3c3de2 DW |
133 | int xfs_rtalloc_query_range(struct xfs_trans *tp, |
134 | struct xfs_rtalloc_rec *low_rec, | |
135 | struct xfs_rtalloc_rec *high_rec, | |
136 | xfs_rtalloc_query_range_fn fn, | |
137 | void *priv); | |
138 | int xfs_rtalloc_query_all(struct xfs_trans *tp, | |
139 | xfs_rtalloc_query_range_fn fn, | |
140 | void *priv); | |
21ec5416 | 141 | bool xfs_verify_rtbno(struct xfs_mount *mp, xfs_rtblock_t rtbno); |
46d9bfb5 DW |
142 | int xfs_rtalloc_extent_is_free(struct xfs_mount *mp, struct xfs_trans *tp, |
143 | xfs_rtblock_t start, xfs_extlen_t len, | |
144 | bool *is_free); | |
1da177e4 | 145 | #else |
089ec2f8 | 146 | # define xfs_rtallocate_extent(t,b,min,max,l,f,p,rb) (ENOSYS) |
1da177e4 LT |
147 | # define xfs_rtfree_extent(t,b,l) (ENOSYS) |
148 | # define xfs_rtpick_extent(m,t,l,rb) (ENOSYS) | |
149 | # define xfs_growfs_rt(mp,in) (ENOSYS) | |
fb3c3de2 DW |
150 | # define xfs_rtalloc_query_range(t,l,h,f,p) (ENOSYS) |
151 | # define xfs_rtalloc_query_all(t,f,p) (ENOSYS) | |
26788097 | 152 | # define xfs_rtbuf_get(m,t,b,i,p) (ENOSYS) |
21ec5416 | 153 | # define xfs_verify_rtbno(m, r) (false) |
46d9bfb5 | 154 | # define xfs_rtalloc_extent_is_free(m,t,s,l,i) (ENOSYS) |
32891b29 ES |
155 | static inline int /* error */ |
156 | xfs_rtmount_init( | |
157 | xfs_mount_t *mp) /* file system mount structure */ | |
158 | { | |
159 | if (mp->m_sb.sb_rblocks == 0) | |
160 | return 0; | |
161 | ||
0b932ccc | 162 | xfs_warn(mp, "Not built with CONFIG_XFS_RT"); |
2451337d | 163 | return -ENOSYS; |
32891b29 | 164 | } |
1da177e4 | 165 | # define xfs_rtmount_inodes(m) (((mp)->m_sb.sb_rblocks == 0)? 0 : (ENOSYS)) |
b93b6e43 | 166 | # define xfs_rtunmount_inodes(m) |
1da177e4 LT |
167 | #endif /* CONFIG_XFS_RT */ |
168 | ||
1da177e4 | 169 | #endif /* __XFS_RTALLOC_H__ */ |