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 23 struct xfs_mount; 24 struct xfs_trans; 25 26 struct xfs_rtalloc_rec { 27 xfs_rtblock_t ar_startblock; 28 xfs_rtblock_t ar_blockcount; 29 }; 30 31 typedef int (*xfs_rtalloc_query_range_fn)( 32 struct xfs_trans *tp, 33 struct xfs_rtalloc_rec *rec, 34 void *priv); 35 36 #ifdef CONFIG_XFS_RT 37 /* 38 * Function prototypes for exported functions. 39 */ 40 41 /* 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. 45 */ 46 int /* error */ 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 */ 56 57 /* 58 * Free an extent in the realtime subvolume. Length is expressed in 59 * realtime extents, as is the block number. 60 */ 61 int /* error */ 62 xfs_rtfree_extent( 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 */ 66 67 /* 68 * Initialize realtime fields in the mount structure. 69 */ 70 int /* error */ 71 xfs_rtmount_init( 72 struct xfs_mount *mp); /* file system mount structure */ 73 void 74 xfs_rtunmount_inodes( 75 struct xfs_mount *mp); 76 77 /* 78 * Get the bitmap and summary inodes into the mount structure 79 * at mount time. 80 */ 81 int /* error */ 82 xfs_rtmount_inodes( 83 struct xfs_mount *mp); /* file system mount structure */ 84 85 /* 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, ... 91 */ 92 int /* error */ 93 xfs_rtpick_extent( 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 */ 98 99 /* 100 * Grow the realtime area of the filesystem. 101 */ 102 int 103 xfs_growfs_rt( 104 struct xfs_mount *mp, /* file system mount structure */ 105 xfs_growfs_rt_t *in); /* user supplied growfs struct */ 106 107 /* 108 * From xfs_rtbitmap.c 109 */ 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, 126 xfs_suminfo_t *sum); 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, 129 xfs_fsblock_t *rsb); 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, 137 void *priv); 138 int xfs_rtalloc_query_all(struct xfs_trans *tp, 139 xfs_rtalloc_query_range_fn fn, 140 void *priv); 141 #else 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 */ 150 xfs_rtmount_init( 151 xfs_mount_t *mp) /* file system mount structure */ 152 { 153 if (mp->m_sb.sb_rblocks == 0) 154 return 0; 155 156 xfs_warn(mp, "Not built with CONFIG_XFS_RT"); 157 return -ENOSYS; 158 } 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 */ 162 163 #endif /* __XFS_RTALLOC_H__ */ 164