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 11 struct xfs_mount; 12 struct xfs_trans; 13 14 /* 15 * XXX: Most of the realtime allocation functions deal in units of realtime 16 * extents, not realtime blocks. This looks funny when paired with the type 17 * name and screams for a larger cleanup. 18 */ 19 struct xfs_rtalloc_rec { 20 xfs_rtblock_t ar_startext; 21 xfs_rtblock_t ar_extcount; 22 }; 23 24 typedef int (*xfs_rtalloc_query_range_fn)( 25 struct xfs_trans *tp, 26 const struct xfs_rtalloc_rec *rec, 27 void *priv); 28 29 #ifdef CONFIG_XFS_RT 30 /* 31 * Function prototypes for exported functions. 32 */ 33 34 /* 35 * Allocate an extent in the realtime subvolume, with the usual allocation 36 * parameters. The length units are all in realtime extents, as is the 37 * result block number. 38 */ 39 int /* error */ 40 xfs_rtallocate_extent( 41 struct xfs_trans *tp, /* transaction pointer */ 42 xfs_rtblock_t bno, /* starting block number to allocate */ 43 xfs_extlen_t minlen, /* minimum length to allocate */ 44 xfs_extlen_t maxlen, /* maximum length to allocate */ 45 xfs_extlen_t *len, /* out: actual length allocated */ 46 int wasdel, /* was a delayed allocation extent */ 47 xfs_extlen_t prod, /* extent product factor */ 48 xfs_rtblock_t *rtblock); /* out: start block allocated */ 49 50 /* 51 * Free an extent in the realtime subvolume. Length is expressed in 52 * realtime extents, as is the block number. 53 */ 54 int /* error */ 55 xfs_rtfree_extent( 56 struct xfs_trans *tp, /* transaction pointer */ 57 xfs_rtblock_t bno, /* starting block number to free */ 58 xfs_extlen_t len); /* length of extent freed */ 59 60 /* 61 * Initialize realtime fields in the mount structure. 62 */ 63 int /* error */ 64 xfs_rtmount_init( 65 struct xfs_mount *mp); /* file system mount structure */ 66 void 67 xfs_rtunmount_inodes( 68 struct xfs_mount *mp); 69 70 /* 71 * Get the bitmap and summary inodes into the mount structure 72 * at mount time. 73 */ 74 int /* error */ 75 xfs_rtmount_inodes( 76 struct xfs_mount *mp); /* file system mount structure */ 77 78 /* 79 * Pick an extent for allocation at the start of a new realtime file. 80 * Use the sequence number stored in the atime field of the bitmap inode. 81 * Translate this to a fraction of the rtextents, and return the product 82 * of rtextents and the fraction. 83 * The fraction sequence is 0, 1/2, 1/4, 3/4, 1/8, ..., 7/8, 1/16, ... 84 */ 85 int /* error */ 86 xfs_rtpick_extent( 87 struct xfs_mount *mp, /* file system mount point */ 88 struct xfs_trans *tp, /* transaction pointer */ 89 xfs_extlen_t len, /* allocation length (rtextents) */ 90 xfs_rtblock_t *pick); /* result rt extent */ 91 92 /* 93 * Grow the realtime area of the filesystem. 94 */ 95 int 96 xfs_growfs_rt( 97 struct xfs_mount *mp, /* file system mount structure */ 98 xfs_growfs_rt_t *in); /* user supplied growfs struct */ 99 100 /* 101 * From xfs_rtbitmap.c 102 */ 103 int xfs_rtbuf_get(struct xfs_mount *mp, struct xfs_trans *tp, 104 xfs_rtblock_t block, int issum, struct xfs_buf **bpp); 105 int xfs_rtcheck_range(struct xfs_mount *mp, struct xfs_trans *tp, 106 xfs_rtblock_t start, xfs_extlen_t len, int val, 107 xfs_rtblock_t *new, int *stat); 108 int xfs_rtfind_back(struct xfs_mount *mp, struct xfs_trans *tp, 109 xfs_rtblock_t start, xfs_rtblock_t limit, 110 xfs_rtblock_t *rtblock); 111 int xfs_rtfind_forw(struct xfs_mount *mp, struct xfs_trans *tp, 112 xfs_rtblock_t start, xfs_rtblock_t limit, 113 xfs_rtblock_t *rtblock); 114 int xfs_rtmodify_range(struct xfs_mount *mp, struct xfs_trans *tp, 115 xfs_rtblock_t start, xfs_extlen_t len, int val); 116 int xfs_rtmodify_summary_int(struct xfs_mount *mp, struct xfs_trans *tp, 117 int log, xfs_rtblock_t bbno, int delta, 118 struct xfs_buf **rbpp, xfs_fsblock_t *rsb, 119 xfs_suminfo_t *sum); 120 int xfs_rtmodify_summary(struct xfs_mount *mp, struct xfs_trans *tp, int log, 121 xfs_rtblock_t bbno, int delta, struct xfs_buf **rbpp, 122 xfs_fsblock_t *rsb); 123 int xfs_rtfree_range(struct xfs_mount *mp, struct xfs_trans *tp, 124 xfs_rtblock_t start, xfs_extlen_t len, 125 struct xfs_buf **rbpp, xfs_fsblock_t *rsb); 126 int xfs_rtalloc_query_range(struct xfs_trans *tp, 127 const struct xfs_rtalloc_rec *low_rec, 128 const struct xfs_rtalloc_rec *high_rec, 129 xfs_rtalloc_query_range_fn fn, void *priv); 130 int xfs_rtalloc_query_all(struct xfs_trans *tp, 131 xfs_rtalloc_query_range_fn fn, 132 void *priv); 133 bool xfs_verify_rtbno(struct xfs_mount *mp, xfs_rtblock_t rtbno); 134 int xfs_rtalloc_extent_is_free(struct xfs_mount *mp, struct xfs_trans *tp, 135 xfs_rtblock_t start, xfs_extlen_t len, 136 bool *is_free); 137 #else 138 # define xfs_rtallocate_extent(t,b,min,max,l,f,p,rb) (ENOSYS) 139 # define xfs_rtfree_extent(t,b,l) (ENOSYS) 140 # define xfs_rtpick_extent(m,t,l,rb) (ENOSYS) 141 # define xfs_growfs_rt(mp,in) (ENOSYS) 142 # define xfs_rtalloc_query_range(t,l,h,f,p) (ENOSYS) 143 # define xfs_rtalloc_query_all(t,f,p) (ENOSYS) 144 # define xfs_rtbuf_get(m,t,b,i,p) (ENOSYS) 145 # define xfs_verify_rtbno(m, r) (false) 146 # define xfs_rtalloc_extent_is_free(m,t,s,l,i) (ENOSYS) 147 static inline int /* error */ 148 xfs_rtmount_init( 149 xfs_mount_t *mp) /* file system mount structure */ 150 { 151 if (mp->m_sb.sb_rblocks == 0) 152 return 0; 153 154 xfs_warn(mp, "Not built with CONFIG_XFS_RT"); 155 return -ENOSYS; 156 } 157 # define xfs_rtmount_inodes(m) (((mp)->m_sb.sb_rblocks == 0)? 0 : (ENOSYS)) 158 # define xfs_rtunmount_inodes(m) 159 #endif /* CONFIG_XFS_RT */ 160 161 #endif /* __XFS_RTALLOC_H__ */ 162