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_mount *mp, 26 struct xfs_trans *tp, 27 const struct xfs_rtalloc_rec *rec, 28 void *priv); 29 30 #ifdef CONFIG_XFS_RT 31 /* 32 * Function prototypes for exported functions. 33 */ 34 35 /* 36 * Allocate an extent in the realtime subvolume, with the usual allocation 37 * parameters. The length units are all in realtime extents, as is the 38 * result block number. 39 */ 40 int /* error */ 41 xfs_rtallocate_extent( 42 struct xfs_trans *tp, /* transaction pointer */ 43 xfs_rtblock_t bno, /* starting block number to allocate */ 44 xfs_extlen_t minlen, /* minimum length to allocate */ 45 xfs_extlen_t maxlen, /* maximum length to allocate */ 46 xfs_extlen_t *len, /* out: actual length allocated */ 47 int wasdel, /* was a delayed allocation extent */ 48 xfs_extlen_t prod, /* extent product factor */ 49 xfs_rtblock_t *rtblock); /* out: start block allocated */ 50 51 /* 52 * Free an extent in the realtime subvolume. Length is expressed in 53 * realtime extents, as is the block number. 54 */ 55 int /* error */ 56 xfs_rtfree_extent( 57 struct xfs_trans *tp, /* transaction pointer */ 58 xfs_rtblock_t bno, /* starting block number to free */ 59 xfs_extlen_t len); /* length of extent freed */ 60 61 /* 62 * Initialize realtime fields in the mount structure. 63 */ 64 int /* error */ 65 xfs_rtmount_init( 66 struct xfs_mount *mp); /* file system mount structure */ 67 void 68 xfs_rtunmount_inodes( 69 struct xfs_mount *mp); 70 71 /* 72 * Get the bitmap and summary inodes into the mount structure 73 * at mount time. 74 */ 75 int /* error */ 76 xfs_rtmount_inodes( 77 struct xfs_mount *mp); /* file system mount structure */ 78 79 /* 80 * Pick an extent for allocation at the start of a new realtime file. 81 * Use the sequence number stored in the atime field of the bitmap inode. 82 * Translate this to a fraction of the rtextents, and return the product 83 * of rtextents and the fraction. 84 * The fraction sequence is 0, 1/2, 1/4, 3/4, 1/8, ..., 7/8, 1/16, ... 85 */ 86 int /* error */ 87 xfs_rtpick_extent( 88 struct xfs_mount *mp, /* file system mount point */ 89 struct xfs_trans *tp, /* transaction pointer */ 90 xfs_extlen_t len, /* allocation length (rtextents) */ 91 xfs_rtblock_t *pick); /* result rt extent */ 92 93 /* 94 * Grow the realtime area of the filesystem. 95 */ 96 int 97 xfs_growfs_rt( 98 struct xfs_mount *mp, /* file system mount structure */ 99 xfs_growfs_rt_t *in); /* user supplied growfs struct */ 100 101 /* 102 * From xfs_rtbitmap.c 103 */ 104 int xfs_rtbuf_get(struct xfs_mount *mp, struct xfs_trans *tp, 105 xfs_rtblock_t block, int issum, struct xfs_buf **bpp); 106 int xfs_rtcheck_range(struct xfs_mount *mp, struct xfs_trans *tp, 107 xfs_rtblock_t start, xfs_extlen_t len, int val, 108 xfs_rtblock_t *new, int *stat); 109 int xfs_rtfind_back(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_rtfind_forw(struct xfs_mount *mp, struct xfs_trans *tp, 113 xfs_rtblock_t start, xfs_rtblock_t limit, 114 xfs_rtblock_t *rtblock); 115 int xfs_rtmodify_range(struct xfs_mount *mp, struct xfs_trans *tp, 116 xfs_rtblock_t start, xfs_extlen_t len, int val); 117 int xfs_rtmodify_summary_int(struct xfs_mount *mp, struct xfs_trans *tp, 118 int log, xfs_rtblock_t bbno, int delta, 119 struct xfs_buf **rbpp, xfs_fsblock_t *rsb, 120 xfs_suminfo_t *sum); 121 int xfs_rtmodify_summary(struct xfs_mount *mp, struct xfs_trans *tp, int log, 122 xfs_rtblock_t bbno, int delta, struct xfs_buf **rbpp, 123 xfs_fsblock_t *rsb); 124 int xfs_rtfree_range(struct xfs_mount *mp, struct xfs_trans *tp, 125 xfs_rtblock_t start, xfs_extlen_t len, 126 struct xfs_buf **rbpp, xfs_fsblock_t *rsb); 127 int xfs_rtalloc_query_range(struct xfs_mount *mp, struct xfs_trans *tp, 128 const struct xfs_rtalloc_rec *low_rec, 129 const struct xfs_rtalloc_rec *high_rec, 130 xfs_rtalloc_query_range_fn fn, void *priv); 131 int xfs_rtalloc_query_all(struct xfs_mount *mp, struct xfs_trans *tp, 132 xfs_rtalloc_query_range_fn fn, 133 void *priv); 134 bool xfs_verify_rtbno(struct xfs_mount *mp, xfs_rtblock_t rtbno); 135 int xfs_rtalloc_extent_is_free(struct xfs_mount *mp, struct xfs_trans *tp, 136 xfs_rtblock_t start, xfs_extlen_t len, 137 bool *is_free); 138 int xfs_rtalloc_reinit_frextents(struct xfs_mount *mp); 139 #else 140 # define xfs_rtallocate_extent(t,b,min,max,l,f,p,rb) (ENOSYS) 141 # define xfs_rtfree_extent(t,b,l) (ENOSYS) 142 # define xfs_rtpick_extent(m,t,l,rb) (ENOSYS) 143 # define xfs_growfs_rt(mp,in) (ENOSYS) 144 # define xfs_rtalloc_query_range(t,l,h,f,p) (ENOSYS) 145 # define xfs_rtalloc_query_all(m,t,f,p) (ENOSYS) 146 # define xfs_rtbuf_get(m,t,b,i,p) (ENOSYS) 147 # define xfs_verify_rtbno(m, r) (false) 148 # define xfs_rtalloc_extent_is_free(m,t,s,l,i) (ENOSYS) 149 # define xfs_rtalloc_reinit_frextents(m) (0) 150 static inline int /* error */ 151 xfs_rtmount_init( 152 xfs_mount_t *mp) /* file system mount structure */ 153 { 154 if (mp->m_sb.sb_rblocks == 0) 155 return 0; 156 157 xfs_warn(mp, "Not built with CONFIG_XFS_RT"); 158 return -ENOSYS; 159 } 160 # define xfs_rtmount_inodes(m) (((mp)->m_sb.sb_rblocks == 0)? 0 : (ENOSYS)) 161 # define xfs_rtunmount_inodes(m) 162 #endif /* CONFIG_XFS_RT */ 163 164 #endif /* __XFS_RTALLOC_H__ */ 165