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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 | ||
1da177e4 LT |
26 | #ifdef CONFIG_XFS_RT |
27 | /* | |
28 | * Function prototypes for exported functions. | |
29 | */ | |
30 | ||
31 | /* | |
32 | * Allocate an extent in the realtime subvolume, with the usual allocation | |
33 | * parameters. The length units are all in realtime extents, as is the | |
34 | * result block number. | |
35 | */ | |
36 | int /* error */ | |
37 | xfs_rtallocate_extent( | |
38 | struct xfs_trans *tp, /* transaction pointer */ | |
39 | xfs_rtblock_t bno, /* starting block number to allocate */ | |
40 | xfs_extlen_t minlen, /* minimum length to allocate */ | |
41 | xfs_extlen_t maxlen, /* maximum length to allocate */ | |
42 | xfs_extlen_t *len, /* out: actual length allocated */ | |
43 | xfs_alloctype_t type, /* allocation type XFS_ALLOCTYPE... */ | |
44 | int wasdel, /* was a delayed allocation extent */ | |
45 | xfs_extlen_t prod, /* extent product factor */ | |
46 | xfs_rtblock_t *rtblock); /* out: start block allocated */ | |
47 | ||
48 | /* | |
49 | * Free an extent in the realtime subvolume. Length is expressed in | |
50 | * realtime extents, as is the block number. | |
51 | */ | |
52 | int /* error */ | |
53 | xfs_rtfree_extent( | |
54 | struct xfs_trans *tp, /* transaction pointer */ | |
55 | xfs_rtblock_t bno, /* starting block number to free */ | |
56 | xfs_extlen_t len); /* length of extent freed */ | |
57 | ||
58 | /* | |
59 | * Initialize realtime fields in the mount structure. | |
60 | */ | |
61 | int /* error */ | |
62 | xfs_rtmount_init( | |
63 | struct xfs_mount *mp); /* file system mount structure */ | |
b93b6e43 CH |
64 | void |
65 | xfs_rtunmount_inodes( | |
66 | struct xfs_mount *mp); | |
1da177e4 LT |
67 | |
68 | /* | |
69 | * Get the bitmap and summary inodes into the mount structure | |
70 | * at mount time. | |
71 | */ | |
72 | int /* error */ | |
73 | xfs_rtmount_inodes( | |
74 | struct xfs_mount *mp); /* file system mount structure */ | |
75 | ||
76 | /* | |
77 | * Pick an extent for allocation at the start of a new realtime file. | |
78 | * Use the sequence number stored in the atime field of the bitmap inode. | |
79 | * Translate this to a fraction of the rtextents, and return the product | |
80 | * of rtextents and the fraction. | |
81 | * The fraction sequence is 0, 1/2, 1/4, 3/4, 1/8, ..., 7/8, 1/16, ... | |
82 | */ | |
83 | int /* error */ | |
84 | xfs_rtpick_extent( | |
85 | struct xfs_mount *mp, /* file system mount point */ | |
86 | struct xfs_trans *tp, /* transaction pointer */ | |
87 | xfs_extlen_t len, /* allocation length (rtextents) */ | |
88 | xfs_rtblock_t *pick); /* result rt extent */ | |
89 | ||
1da177e4 LT |
90 | /* |
91 | * Grow the realtime area of the filesystem. | |
92 | */ | |
93 | int | |
94 | xfs_growfs_rt( | |
95 | struct xfs_mount *mp, /* file system mount structure */ | |
96 | xfs_growfs_rt_t *in); /* user supplied growfs struct */ | |
97 | ||
c963c619 DC |
98 | /* |
99 | * From xfs_rtbitmap.c | |
100 | */ | |
101 | int xfs_rtbuf_get(struct xfs_mount *mp, struct xfs_trans *tp, | |
102 | xfs_rtblock_t block, int issum, struct xfs_buf **bpp); | |
103 | int xfs_rtcheck_range(struct xfs_mount *mp, struct xfs_trans *tp, | |
104 | xfs_rtblock_t start, xfs_extlen_t len, int val, | |
105 | xfs_rtblock_t *new, int *stat); | |
106 | int xfs_rtfind_back(struct xfs_mount *mp, struct xfs_trans *tp, | |
107 | xfs_rtblock_t start, xfs_rtblock_t limit, | |
108 | xfs_rtblock_t *rtblock); | |
109 | int xfs_rtfind_forw(struct xfs_mount *mp, struct xfs_trans *tp, | |
110 | xfs_rtblock_t start, xfs_rtblock_t limit, | |
111 | xfs_rtblock_t *rtblock); | |
112 | int xfs_rtmodify_range(struct xfs_mount *mp, struct xfs_trans *tp, | |
113 | xfs_rtblock_t start, xfs_extlen_t len, int val); | |
afabfd30 ES |
114 | int xfs_rtmodify_summary_int(struct xfs_mount *mp, struct xfs_trans *tp, |
115 | int log, xfs_rtblock_t bbno, int delta, | |
116 | xfs_buf_t **rbpp, xfs_fsblock_t *rsb, | |
117 | xfs_suminfo_t *sum); | |
c963c619 DC |
118 | int xfs_rtmodify_summary(struct xfs_mount *mp, struct xfs_trans *tp, int log, |
119 | xfs_rtblock_t bbno, int delta, xfs_buf_t **rbpp, | |
120 | xfs_fsblock_t *rsb); | |
121 | int xfs_rtfree_range(struct xfs_mount *mp, struct xfs_trans *tp, | |
122 | xfs_rtblock_t start, xfs_extlen_t len, | |
123 | struct xfs_buf **rbpp, xfs_fsblock_t *rsb); | |
124 | ||
125 | ||
1da177e4 LT |
126 | #else |
127 | # define xfs_rtallocate_extent(t,b,min,max,l,a,f,p,rb) (ENOSYS) | |
128 | # define xfs_rtfree_extent(t,b,l) (ENOSYS) | |
129 | # define xfs_rtpick_extent(m,t,l,rb) (ENOSYS) | |
130 | # define xfs_growfs_rt(mp,in) (ENOSYS) | |
32891b29 ES |
131 | static inline int /* error */ |
132 | xfs_rtmount_init( | |
133 | xfs_mount_t *mp) /* file system mount structure */ | |
134 | { | |
135 | if (mp->m_sb.sb_rblocks == 0) | |
136 | return 0; | |
137 | ||
0b932ccc | 138 | xfs_warn(mp, "Not built with CONFIG_XFS_RT"); |
2451337d | 139 | return -ENOSYS; |
32891b29 | 140 | } |
1da177e4 | 141 | # define xfs_rtmount_inodes(m) (((mp)->m_sb.sb_rblocks == 0)? 0 : (ENOSYS)) |
b93b6e43 | 142 | # define xfs_rtunmount_inodes(m) |
1da177e4 LT |
143 | #endif /* CONFIG_XFS_RT */ |
144 | ||
1da177e4 | 145 | #endif /* __XFS_RTALLOC_H__ */ |