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 #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 */ 36 int /* error */ 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 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 */ 52 int /* error */ 53 xfs_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 */ 61 int /* error */ 62 xfs_rtmount_init( 63 struct xfs_mount *mp); /* file system mount structure */ 64 void 65 xfs_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 */ 72 int /* error */ 73 xfs_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 */ 83 int /* error */ 84 xfs_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 */ 93 int 94 xfs_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 */ 101 int xfs_rtbuf_get(struct xfs_mount *mp, struct xfs_trans *tp, 102 xfs_rtblock_t block, int issum, struct xfs_buf **bpp); 103 int 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); 106 int 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); 109 int 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); 112 int xfs_rtmodify_range(struct xfs_mount *mp, struct xfs_trans *tp, 113 xfs_rtblock_t start, xfs_extlen_t len, int val); 114 int xfs_rtmodify_summary_int(struct xfs_mount *mp, struct xfs_trans *tp, 115 int log, xfs_rtblock_t bbno, int delta, 116 xfs_buf_t **rbpp, xfs_fsblock_t *rsb, 117 xfs_suminfo_t *sum); 118 int xfs_rtmodify_summary(struct xfs_mount *mp, struct xfs_trans *tp, int log, 119 xfs_rtblock_t bbno, int delta, xfs_buf_t **rbpp, 120 xfs_fsblock_t *rsb); 121 int xfs_rtfree_range(struct xfs_mount *mp, struct xfs_trans *tp, 122 xfs_rtblock_t start, xfs_extlen_t len, 123 struct xfs_buf **rbpp, xfs_fsblock_t *rsb); 124 125 126 #else 127 # define xfs_rtallocate_extent(t,b,min,max,l,a,f,p,rb) (ENOSYS) 128 # define xfs_rtfree_extent(t,b,l) (ENOSYS) 129 # define xfs_rtpick_extent(m,t,l,rb) (ENOSYS) 130 # define xfs_growfs_rt(mp,in) (ENOSYS) 131 static inline int /* error */ 132 xfs_rtmount_init( 133 xfs_mount_t *mp) /* file system mount structure */ 134 { 135 if (mp->m_sb.sb_rblocks == 0) 136 return 0; 137 138 xfs_warn(mp, "Not built with CONFIG_XFS_RT"); 139 return -ENOSYS; 140 } 141 # define xfs_rtmount_inodes(m) (((mp)->m_sb.sb_rblocks == 0)? 0 : (ENOSYS)) 142 # define xfs_rtunmount_inodes(m) 143 #endif /* CONFIG_XFS_RT */ 144 145 #endif /* __XFS_RTALLOC_H__ */ 146