| Kyle Swenson | 8d8f654 | 2021-03-15 11:02:55 -0600 | [diff] [blame^] | 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__ */ |