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 */
28 * Function prototypes for exported functions.
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.
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 int wasdel, /* was a delayed allocation extent */
44 xfs_extlen_t prod, /* extent product factor */
45 xfs_rtblock_t *rtblock); /* out: start block allocated */
48 * Free an extent in the realtime subvolume. Length is expressed in
49 * realtime extents, as is the block number.
53 struct xfs_trans *tp, /* transaction pointer */
54 xfs_rtblock_t bno, /* starting block number to free */
55 xfs_extlen_t len); /* length of extent freed */
58 * Initialize realtime fields in the mount structure.
62 struct xfs_mount *mp); /* file system mount structure */
65 struct xfs_mount *mp);
68 * Get the bitmap and summary inodes into the mount structure
73 struct xfs_mount *mp); /* file system mount structure */
76 * Pick an extent for allocation at the start of a new realtime file.
77 * Use the sequence number stored in the atime field of the bitmap inode.
78 * Translate this to a fraction of the rtextents, and return the product
79 * of rtextents and the fraction.
80 * The fraction sequence is 0, 1/2, 1/4, 3/4, 1/8, ..., 7/8, 1/16, ...
84 struct xfs_mount *mp, /* file system mount point */
85 struct xfs_trans *tp, /* transaction pointer */
86 xfs_extlen_t len, /* allocation length (rtextents) */
87 xfs_rtblock_t *pick); /* result rt extent */
90 * Grow the realtime area of the filesystem.
94 struct xfs_mount *mp, /* file system mount structure */
95 xfs_growfs_rt_t *in); /* user supplied growfs struct */
100 int xfs_rtcheck_range(struct xfs_mount *mp, struct xfs_trans *tp,
101 xfs_rtblock_t start, xfs_extlen_t len, int val,
102 xfs_rtblock_t *new, int *stat);
103 int xfs_rtfind_back(struct xfs_mount *mp, struct xfs_trans *tp,
104 xfs_rtblock_t start, xfs_rtblock_t limit,
105 xfs_rtblock_t *rtblock);
106 int xfs_rtfind_forw(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_rtmodify_range(struct xfs_mount *mp, struct xfs_trans *tp,
110 xfs_rtblock_t start, xfs_extlen_t len, int val);
111 int xfs_rtmodify_summary_int(struct xfs_mount *mp, struct xfs_trans *tp,
112 int log, xfs_rtblock_t bbno, int delta,
113 xfs_buf_t **rbpp, xfs_fsblock_t *rsb,
115 int xfs_rtmodify_summary(struct xfs_mount *mp, struct xfs_trans *tp, int log,
116 xfs_rtblock_t bbno, int delta, xfs_buf_t **rbpp,
118 int xfs_rtfree_range(struct xfs_mount *mp, struct xfs_trans *tp,
119 xfs_rtblock_t start, xfs_extlen_t len,
120 struct xfs_buf **rbpp, xfs_fsblock_t *rsb);
124 # define xfs_rtallocate_extent(t,b,min,max,l,f,p,rb) (ENOSYS)
125 # define xfs_rtfree_extent(t,b,l) (ENOSYS)
126 # define xfs_rtpick_extent(m,t,l,rb) (ENOSYS)
127 # define xfs_growfs_rt(mp,in) (ENOSYS)
128 static inline int /* error */
130 xfs_mount_t *mp) /* file system mount structure */
132 if (mp->m_sb.sb_rblocks == 0)
135 xfs_warn(mp, "Not built with CONFIG_XFS_RT");
138 # define xfs_rtmount_inodes(m) (((mp)->m_sb.sb_rblocks == 0)? 0 : (ENOSYS))
139 # define xfs_rtunmount_inodes(m)
140 #endif /* CONFIG_XFS_RT */
142 #endif /* __XFS_RTALLOC_H__ */