2 * Copyright (c) 2000-2003,2005 Silicon Graphics, Inc.
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.
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.
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
18 #ifndef __XFS_RTALLOC_H__
19 #define __XFS_RTALLOC_H__
21 /* kernel only definitions and functions */
26 struct xfs_rtalloc_rec
{
27 xfs_rtblock_t ar_startblock
;
28 xfs_rtblock_t ar_blockcount
;
31 typedef int (*xfs_rtalloc_query_range_fn
)(
33 struct xfs_rtalloc_rec
*rec
,
38 * Function prototypes for exported functions.
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.
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 */
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 */
58 * Free an extent in the realtime subvolume. Length is expressed in
59 * realtime extents, as is the block number.
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 */
68 * Initialize realtime fields in the mount structure.
72 struct xfs_mount
*mp
); /* file system mount structure */
75 struct xfs_mount
*mp
);
78 * Get the bitmap and summary inodes into the mount structure
83 struct xfs_mount
*mp
); /* file system mount structure */
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, ...
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 */
100 * Grow the realtime area of the filesystem.
104 struct xfs_mount
*mp
, /* file system mount structure */
105 xfs_growfs_rt_t
*in
); /* user supplied growfs struct */
108 * From xfs_rtbitmap.c
110 int xfs_rtbuf_get(struct xfs_mount
*mp
, struct xfs_trans
*tp
,
111 xfs_rtblock_t block
, int issum
, struct xfs_buf
**bpp
);
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
);
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
,
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
,
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
);
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
,
138 int xfs_rtalloc_query_all(struct xfs_trans
*tp
,
139 xfs_rtalloc_query_range_fn fn
,
142 # define xfs_rtallocate_extent(t,b,min,max,l,f,p,rb) (ENOSYS)
143 # define xfs_rtfree_extent(t,b,l) (ENOSYS)
144 # define xfs_rtpick_extent(m,t,l,rb) (ENOSYS)
145 # define xfs_growfs_rt(mp,in) (ENOSYS)
146 # define xfs_rtalloc_query_range(t,l,h,f,p) (ENOSYS)
147 # define xfs_rtalloc_query_all(t,f,p) (ENOSYS)
148 # define xfs_rtbuf_get(m,t,b,i,p) (ENOSYS)
149 static inline int /* error */
151 xfs_mount_t
*mp
) /* file system mount structure */
153 if (mp
->m_sb
.sb_rblocks
== 0)
156 xfs_warn(mp
, "Not built with CONFIG_XFS_RT");
159 # define xfs_rtmount_inodes(m) (((mp)->m_sb.sb_rblocks == 0)? 0 : (ENOSYS))
160 # define xfs_rtunmount_inodes(m)
161 #endif /* CONFIG_XFS_RT */
163 #endif /* __XFS_RTALLOC_H__ */