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 11struct xfs_mount; 12struct 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 */ 19struct xfs_rtalloc_rec { 20 xfs_rtblock_t ar_startext; 21 xfs_rtblock_t ar_extcount; 22}; 23 24typedef int (*xfs_rtalloc_query_range_fn)( 25 struct xfs_trans *tp, 26 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 */ 39int /* error */ 40xfs_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 */ 54int /* error */ 55xfs_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 */ 63int /* error */ 64xfs_rtmount_init( 65 struct xfs_mount *mp); /* file system mount structure */ 66void 67xfs_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 */ 74int /* error */ 75xfs_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 */ 85int /* error */ 86xfs_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 */ 95int 96xfs_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 */ 103int xfs_rtbuf_get(struct xfs_mount *mp, struct xfs_trans *tp, 104 xfs_rtblock_t block, int issum, struct xfs_buf **bpp); 105int 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); 108int 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); 111int 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); 114int xfs_rtmodify_range(struct xfs_mount *mp, struct xfs_trans *tp, 115 xfs_rtblock_t start, xfs_extlen_t len, int val); 116int xfs_rtmodify_summary_int(struct xfs_mount *mp, struct xfs_trans *tp, 117 int log, xfs_rtblock_t bbno, int delta, 118 xfs_buf_t **rbpp, xfs_fsblock_t *rsb, 119 xfs_suminfo_t *sum); 120int xfs_rtmodify_summary(struct xfs_mount *mp, struct xfs_trans *tp, int log, 121 xfs_rtblock_t bbno, int delta, xfs_buf_t **rbpp, 122 xfs_fsblock_t *rsb); 123int 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); 126int xfs_rtalloc_query_range(struct xfs_trans *tp, 127 struct xfs_rtalloc_rec *low_rec, 128 struct xfs_rtalloc_rec *high_rec, 129 xfs_rtalloc_query_range_fn fn, 130 void *priv); 131int xfs_rtalloc_query_all(struct xfs_trans *tp, 132 xfs_rtalloc_query_range_fn fn, 133 void *priv); 134bool xfs_verify_rtbno(struct xfs_mount *mp, xfs_rtblock_t rtbno); 135int 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#else 139# define xfs_rtallocate_extent(t,b,min,max,l,f,p,rb) (ENOSYS) 140# define xfs_rtfree_extent(t,b,l) (ENOSYS) 141# define xfs_rtpick_extent(m,t,l,rb) (ENOSYS) 142# define xfs_growfs_rt(mp,in) (ENOSYS) 143# define xfs_rtalloc_query_range(t,l,h,f,p) (ENOSYS) 144# define xfs_rtalloc_query_all(t,f,p) (ENOSYS) 145# define xfs_rtbuf_get(m,t,b,i,p) (ENOSYS) 146# define xfs_verify_rtbno(m, r) (false) 147# define xfs_rtalloc_extent_is_free(m,t,s,l,i) (ENOSYS) 148static inline int /* error */ 149xfs_rtmount_init( 150 xfs_mount_t *mp) /* file system mount structure */ 151{ 152 if (mp->m_sb.sb_rblocks == 0) 153 return 0; 154 155 xfs_warn(mp, "Not built with CONFIG_XFS_RT"); 156 return -ENOSYS; 157} 158# define xfs_rtmount_inodes(m) (((mp)->m_sb.sb_rblocks == 0)? 0 : (ENOSYS)) 159# define xfs_rtunmount_inodes(m) 160#endif /* CONFIG_XFS_RT */ 161 162#endif /* __XFS_RTALLOC_H__ */ 163