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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/*
2 * Copyright (c) 2000-2003,2005 Silicon Graphics, Inc.
3 * All Rights Reserved.
4 *
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
7 * published by the Free Software Foundation.
8 *
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.
13 *
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
17 */
18#ifndef __XFS_RTALLOC_H__
19#define __XFS_RTALLOC_H__
20
21/* kernel only definitions and functions */
22
23struct xfs_mount;
24struct xfs_trans;
25
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 */
36int /* error */
37xfs_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 */
52int /* error */
53xfs_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 */
61int /* error */
62xfs_rtmount_init(
63 struct xfs_mount *mp); /* file system mount structure */
64void
65xfs_rtunmount_inodes(
66 struct xfs_mount *mp);
67
68/*
69 * Get the bitmap and summary inodes into the mount structure
70 * at mount time.
71 */
72int /* error */
73xfs_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 */
83int /* error */
84xfs_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
90/*
91 * Grow the realtime area of the filesystem.
92 */
93int
94xfs_growfs_rt(
95 struct xfs_mount *mp, /* file system mount structure */
96 xfs_growfs_rt_t *in); /* user supplied growfs struct */
97
98/*
99 * From xfs_rtbitmap.c
100 */
101int xfs_rtbuf_get(struct xfs_mount *mp, struct xfs_trans *tp,
102 xfs_rtblock_t block, int issum, struct xfs_buf **bpp);
103int 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);
106int 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);
109int 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);
112int xfs_rtmodify_range(struct xfs_mount *mp, struct xfs_trans *tp,
113 xfs_rtblock_t start, xfs_extlen_t len, int val);
114int xfs_rtmodify_summary(struct xfs_mount *mp, struct xfs_trans *tp, int log,
115 xfs_rtblock_t bbno, int delta, xfs_buf_t **rbpp,
116 xfs_fsblock_t *rsb);
117int xfs_rtfree_range(struct xfs_mount *mp, struct xfs_trans *tp,
118 xfs_rtblock_t start, xfs_extlen_t len,
119 struct xfs_buf **rbpp, xfs_fsblock_t *rsb);
120
121
122#else
123# define xfs_rtallocate_extent(t,b,min,max,l,a,f,p,rb) (ENOSYS)
124# define xfs_rtfree_extent(t,b,l) (ENOSYS)
125# define xfs_rtpick_extent(m,t,l,rb) (ENOSYS)
126# define xfs_growfs_rt(mp,in) (ENOSYS)
127static inline int /* error */
128xfs_rtmount_init(
129 xfs_mount_t *mp) /* file system mount structure */
130{
131 if (mp->m_sb.sb_rblocks == 0)
132 return 0;
133
134 xfs_warn(mp, "Not built with CONFIG_XFS_RT");
135 return ENOSYS;
136}
137# define xfs_rtmount_inodes(m) (((mp)->m_sb.sb_rblocks == 0)? 0 : (ENOSYS))
138# define xfs_rtunmount_inodes(m)
139#endif /* CONFIG_XFS_RT */
140
141#endif /* __XFS_RTALLOC_H__ */