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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
11struct xfs_mount;
12struct xfs_trans;
13
14#ifdef CONFIG_XFS_RT
15/*
16 * Initialize realtime fields in the mount structure.
17 */
18int /* error */
19xfs_rtmount_init(
20 struct xfs_mount *mp); /* file system mount structure */
21void
22xfs_rtunmount_inodes(
23 struct xfs_mount *mp);
24
25/*
26 * Get the bitmap and summary inodes into the mount structure
27 * at mount time.
28 */
29int /* error */
30xfs_rtmount_inodes(
31 struct xfs_mount *mp); /* file system mount structure */
32
33/*
34 * Grow the realtime area of the filesystem.
35 */
36int
37xfs_growfs_rt(
38 struct xfs_mount *mp, /* file system mount structure */
39 xfs_growfs_rt_t *in); /* user supplied growfs struct */
40
41int xfs_rtalloc_reinit_frextents(struct xfs_mount *mp);
42#else
43# define xfs_growfs_rt(mp,in) (-ENOSYS)
44# define xfs_rtalloc_reinit_frextents(m) (0)
45static inline int /* error */
46xfs_rtmount_init(
47 xfs_mount_t *mp) /* file system mount structure */
48{
49 if (mp->m_sb.sb_rblocks == 0)
50 return 0;
51
52 xfs_warn(mp, "Not built with CONFIG_XFS_RT");
53 return -ENOSYS;
54}
55# define xfs_rtmount_inodes(m) (((mp)->m_sb.sb_rblocks == 0)? 0 : (-ENOSYS))
56# define xfs_rtunmount_inodes(m)
57#endif /* CONFIG_XFS_RT */
58
59#endif /* __XFS_RTALLOC_H__ */
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
11struct xfs_mount;
12struct xfs_trans;
13
14/*
15 * XXX: Most of the realtime allocation functions deal in units of realtime
16 * extents, not realtime blocks. This looks funny when paired with the type
17 * name and screams for a larger cleanup.
18 */
19struct xfs_rtalloc_rec {
20 xfs_rtblock_t ar_startext;
21 xfs_rtblock_t ar_extcount;
22};
23
24typedef int (*xfs_rtalloc_query_range_fn)(
25 struct xfs_mount *mp,
26 struct xfs_trans *tp,
27 const struct xfs_rtalloc_rec *rec,
28 void *priv);
29
30#ifdef CONFIG_XFS_RT
31/*
32 * Function prototypes for exported functions.
33 */
34
35/*
36 * Allocate an extent in the realtime subvolume, with the usual allocation
37 * parameters. The length units are all in realtime extents, as is the
38 * result block number.
39 */
40int /* error */
41xfs_rtallocate_extent(
42 struct xfs_trans *tp, /* transaction pointer */
43 xfs_rtblock_t bno, /* starting block number to allocate */
44 xfs_extlen_t minlen, /* minimum length to allocate */
45 xfs_extlen_t maxlen, /* maximum length to allocate */
46 xfs_extlen_t *len, /* out: actual length allocated */
47 int wasdel, /* was a delayed allocation extent */
48 xfs_extlen_t prod, /* extent product factor */
49 xfs_rtblock_t *rtblock); /* out: start block allocated */
50
51/*
52 * Free an extent in the realtime subvolume. Length is expressed in
53 * realtime extents, as is the block number.
54 */
55int /* error */
56xfs_rtfree_extent(
57 struct xfs_trans *tp, /* transaction pointer */
58 xfs_rtblock_t bno, /* starting block number to free */
59 xfs_extlen_t len); /* length of extent freed */
60
61/*
62 * Initialize realtime fields in the mount structure.
63 */
64int /* error */
65xfs_rtmount_init(
66 struct xfs_mount *mp); /* file system mount structure */
67void
68xfs_rtunmount_inodes(
69 struct xfs_mount *mp);
70
71/*
72 * Get the bitmap and summary inodes into the mount structure
73 * at mount time.
74 */
75int /* error */
76xfs_rtmount_inodes(
77 struct xfs_mount *mp); /* file system mount structure */
78
79/*
80 * Pick an extent for allocation at the start of a new realtime file.
81 * Use the sequence number stored in the atime field of the bitmap inode.
82 * Translate this to a fraction of the rtextents, and return the product
83 * of rtextents and the fraction.
84 * The fraction sequence is 0, 1/2, 1/4, 3/4, 1/8, ..., 7/8, 1/16, ...
85 */
86int /* error */
87xfs_rtpick_extent(
88 struct xfs_mount *mp, /* file system mount point */
89 struct xfs_trans *tp, /* transaction pointer */
90 xfs_extlen_t len, /* allocation length (rtextents) */
91 xfs_rtblock_t *pick); /* result rt extent */
92
93/*
94 * Grow the realtime area of the filesystem.
95 */
96int
97xfs_growfs_rt(
98 struct xfs_mount *mp, /* file system mount structure */
99 xfs_growfs_rt_t *in); /* user supplied growfs struct */
100
101/*
102 * From xfs_rtbitmap.c
103 */
104int xfs_rtbuf_get(struct xfs_mount *mp, struct xfs_trans *tp,
105 xfs_rtblock_t block, int issum, struct xfs_buf **bpp);
106int xfs_rtcheck_range(struct xfs_mount *mp, struct xfs_trans *tp,
107 xfs_rtblock_t start, xfs_extlen_t len, int val,
108 xfs_rtblock_t *new, int *stat);
109int xfs_rtfind_back(struct xfs_mount *mp, struct xfs_trans *tp,
110 xfs_rtblock_t start, xfs_rtblock_t limit,
111 xfs_rtblock_t *rtblock);
112int xfs_rtfind_forw(struct xfs_mount *mp, struct xfs_trans *tp,
113 xfs_rtblock_t start, xfs_rtblock_t limit,
114 xfs_rtblock_t *rtblock);
115int xfs_rtmodify_range(struct xfs_mount *mp, struct xfs_trans *tp,
116 xfs_rtblock_t start, xfs_extlen_t len, int val);
117int xfs_rtmodify_summary_int(struct xfs_mount *mp, struct xfs_trans *tp,
118 int log, xfs_rtblock_t bbno, int delta,
119 struct xfs_buf **rbpp, xfs_fsblock_t *rsb,
120 xfs_suminfo_t *sum);
121int xfs_rtmodify_summary(struct xfs_mount *mp, struct xfs_trans *tp, int log,
122 xfs_rtblock_t bbno, int delta, struct xfs_buf **rbpp,
123 xfs_fsblock_t *rsb);
124int xfs_rtfree_range(struct xfs_mount *mp, struct xfs_trans *tp,
125 xfs_rtblock_t start, xfs_extlen_t len,
126 struct xfs_buf **rbpp, xfs_fsblock_t *rsb);
127int xfs_rtalloc_query_range(struct xfs_mount *mp, struct xfs_trans *tp,
128 const struct xfs_rtalloc_rec *low_rec,
129 const struct xfs_rtalloc_rec *high_rec,
130 xfs_rtalloc_query_range_fn fn, void *priv);
131int xfs_rtalloc_query_all(struct xfs_mount *mp, struct xfs_trans *tp,
132 xfs_rtalloc_query_range_fn fn,
133 void *priv);
134bool xfs_verify_rtbno(struct xfs_mount *mp, xfs_rtblock_t rtbno);
135int xfs_rtalloc_extent_is_free(struct xfs_mount *mp, struct xfs_trans *tp,
136 xfs_rtblock_t start, xfs_extlen_t len,
137 bool *is_free);
138int xfs_rtalloc_reinit_frextents(struct xfs_mount *mp);
139#else
140# define xfs_rtallocate_extent(t,b,min,max,l,f,p,rb) (ENOSYS)
141# define xfs_rtfree_extent(t,b,l) (ENOSYS)
142# define xfs_rtpick_extent(m,t,l,rb) (ENOSYS)
143# define xfs_growfs_rt(mp,in) (ENOSYS)
144# define xfs_rtalloc_query_range(t,l,h,f,p) (ENOSYS)
145# define xfs_rtalloc_query_all(m,t,f,p) (ENOSYS)
146# define xfs_rtbuf_get(m,t,b,i,p) (ENOSYS)
147# define xfs_verify_rtbno(m, r) (false)
148# define xfs_rtalloc_extent_is_free(m,t,s,l,i) (ENOSYS)
149# define xfs_rtalloc_reinit_frextents(m) (0)
150static inline int /* error */
151xfs_rtmount_init(
152 xfs_mount_t *mp) /* file system mount structure */
153{
154 if (mp->m_sb.sb_rblocks == 0)
155 return 0;
156
157 xfs_warn(mp, "Not built with CONFIG_XFS_RT");
158 return -ENOSYS;
159}
160# define xfs_rtmount_inodes(m) (((mp)->m_sb.sb_rblocks == 0)? 0 : (ENOSYS))
161# define xfs_rtunmount_inodes(m)
162#endif /* CONFIG_XFS_RT */
163
164#endif /* __XFS_RTALLOC_H__ */