1 | // SPDX-License-Identifier: GPL-2.0 |
2 | /* |
3 | * Copyright (c) 2000-2003,2005 Silicon Graphics, Inc. |
4 | * All Rights Reserved. |
5 | */ |
6 | #ifndef __XFS_RTALLOC_H__ |
7 | #define __XFS_RTALLOC_H__ |
8 | |
9 | /* kernel only definitions and functions */ |
10 | |
11 | struct xfs_mount; |
12 | struct xfs_trans; |
13 | |
14 | #ifdef CONFIG_XFS_RT |
15 | /* |
16 | * Function prototypes for exported functions. |
17 | */ |
18 | |
19 | /* |
20 | * Allocate an extent in the realtime subvolume, with the usual allocation |
21 | * parameters. The length units are all in realtime extents, as is the |
22 | * result block number. |
23 | */ |
24 | int /* error */ |
25 | xfs_rtallocate_extent( |
26 | struct xfs_trans *tp, /* transaction pointer */ |
27 | xfs_rtxnum_t start, /* starting rtext number to allocate */ |
28 | xfs_rtxlen_t minlen, /* minimum length to allocate */ |
29 | xfs_rtxlen_t maxlen, /* maximum length to allocate */ |
30 | xfs_rtxlen_t *len, /* out: actual length allocated */ |
31 | int wasdel, /* was a delayed allocation extent */ |
32 | xfs_rtxlen_t prod, /* extent product factor */ |
33 | xfs_rtxnum_t *rtblock); /* out: start rtext allocated */ |
34 | |
35 | |
36 | /* |
37 | * Initialize realtime fields in the mount structure. |
38 | */ |
39 | int /* error */ |
40 | xfs_rtmount_init( |
41 | struct xfs_mount *mp); /* file system mount structure */ |
42 | void |
43 | xfs_rtunmount_inodes( |
44 | struct xfs_mount *mp); |
45 | |
46 | /* |
47 | * Get the bitmap and summary inodes into the mount structure |
48 | * at mount time. |
49 | */ |
50 | int /* error */ |
51 | xfs_rtmount_inodes( |
52 | struct xfs_mount *mp); /* file system mount structure */ |
53 | |
54 | /* |
55 | * Pick an extent for allocation at the start of a new realtime file. |
56 | * Use the sequence number stored in the atime field of the bitmap inode. |
57 | * Translate this to a fraction of the rtextents, and return the product |
58 | * of rtextents and the fraction. |
59 | * The fraction sequence is 0, 1/2, 1/4, 3/4, 1/8, ..., 7/8, 1/16, ... |
60 | */ |
61 | int /* error */ |
62 | xfs_rtpick_extent( |
63 | struct xfs_mount *mp, /* file system mount point */ |
64 | struct xfs_trans *tp, /* transaction pointer */ |
65 | xfs_rtxlen_t len, /* allocation length (rtextents) */ |
66 | xfs_rtxnum_t *pick); /* result rt extent */ |
67 | |
68 | /* |
69 | * Grow the realtime area of the filesystem. |
70 | */ |
71 | int |
72 | xfs_growfs_rt( |
73 | struct xfs_mount *mp, /* file system mount structure */ |
74 | xfs_growfs_rt_t *in); /* user supplied growfs struct */ |
75 | |
76 | int xfs_rtalloc_reinit_frextents(struct xfs_mount *mp); |
77 | #else |
78 | # define xfs_rtallocate_extent(t,b,min,max,l,f,p,rb) (-ENOSYS) |
79 | # define xfs_rtpick_extent(m,t,l,rb) (-ENOSYS) |
80 | # define xfs_growfs_rt(mp,in) (-ENOSYS) |
81 | # define xfs_rtalloc_reinit_frextents(m) (0) |
82 | static inline int /* error */ |
83 | xfs_rtmount_init( |
84 | xfs_mount_t *mp) /* file system mount structure */ |
85 | { |
86 | if (mp->m_sb.sb_rblocks == 0) |
87 | return 0; |
88 | |
89 | xfs_warn(mp, "Not built with CONFIG_XFS_RT" ); |
90 | return -ENOSYS; |
91 | } |
92 | # define xfs_rtmount_inodes(m) (((mp)->m_sb.sb_rblocks == 0)? 0 : (-ENOSYS)) |
93 | # define xfs_rtunmount_inodes(m) |
94 | #endif /* CONFIG_XFS_RT */ |
95 | |
96 | #endif /* __XFS_RTALLOC_H__ */ |
97 | |