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1da177e4 | 1 | /* |
7b718769 NS |
2 | * Copyright (c) 2000-2002,2005 Silicon Graphics, Inc. |
3 | * All Rights Reserved. | |
1da177e4 | 4 | * |
7b718769 NS |
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 | |
1da177e4 LT |
7 | * published by the Free Software Foundation. |
8 | * | |
7b718769 NS |
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. | |
1da177e4 | 13 | * |
7b718769 NS |
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 | |
1da177e4 LT |
17 | */ |
18 | #ifndef __XFS_ALLOC_H__ | |
19 | #define __XFS_ALLOC_H__ | |
20 | ||
21 | struct xfs_buf; | |
a46db608 | 22 | struct xfs_btree_cur; |
1da177e4 LT |
23 | struct xfs_mount; |
24 | struct xfs_perag; | |
25 | struct xfs_trans; | |
26 | ||
c999a223 DC |
27 | extern struct workqueue_struct *xfs_alloc_wq; |
28 | ||
a78ee256 DC |
29 | unsigned int xfs_agfl_size(struct xfs_mount *mp); |
30 | ||
1da177e4 LT |
31 | /* |
32 | * Freespace allocation types. Argument to xfs_alloc_[v]extent. | |
33 | */ | |
807cbbdb | 34 | #define XFS_ALLOCTYPE_FIRST_AG 0x02 /* ... start at ag 0 */ |
807cbbdb CH |
35 | #define XFS_ALLOCTYPE_THIS_AG 0x08 /* anywhere in this a.g. */ |
36 | #define XFS_ALLOCTYPE_START_BNO 0x10 /* near this block else anywhere */ | |
37 | #define XFS_ALLOCTYPE_NEAR_BNO 0x20 /* in this a.g. and near this block */ | |
38 | #define XFS_ALLOCTYPE_THIS_BNO 0x40 /* at exactly this block */ | |
39 | ||
40 | /* this should become an enum again when the tracing code is fixed */ | |
41 | typedef unsigned int xfs_alloctype_t; | |
1da177e4 | 42 | |
0b1b213f | 43 | #define XFS_ALLOC_TYPES \ |
0b1b213f | 44 | { XFS_ALLOCTYPE_FIRST_AG, "FIRST_AG" }, \ |
0b1b213f CH |
45 | { XFS_ALLOCTYPE_THIS_AG, "THIS_AG" }, \ |
46 | { XFS_ALLOCTYPE_START_BNO, "START_BNO" }, \ | |
47 | { XFS_ALLOCTYPE_NEAR_BNO, "NEAR_BNO" }, \ | |
48 | { XFS_ALLOCTYPE_THIS_BNO, "THIS_BNO" } | |
49 | ||
1da177e4 LT |
50 | /* |
51 | * Flags for xfs_alloc_fix_freelist. | |
52 | */ | |
53 | #define XFS_ALLOC_FLAG_TRYLOCK 0x00000001 /* use trylock for buffer locking */ | |
d210a28c | 54 | #define XFS_ALLOC_FLAG_FREEING 0x00000002 /* indicate caller is freeing extents*/ |
04f13060 DW |
55 | #define XFS_ALLOC_FLAG_NORMAP 0x00000004 /* don't modify the rmapbt */ |
56 | #define XFS_ALLOC_FLAG_NOSHRINK 0x00000008 /* don't shrink the freelist */ | |
54fee133 | 57 | #define XFS_ALLOC_FLAG_CHECK 0x00000010 /* test only, don't modify args */ |
1da177e4 LT |
58 | |
59 | /* | |
60 | * Argument structure for xfs_alloc routines. | |
61 | * This is turned into a structure to avoid having 20 arguments passed | |
62 | * down several levels of the stack. | |
63 | */ | |
64 | typedef struct xfs_alloc_arg { | |
65 | struct xfs_trans *tp; /* transaction pointer */ | |
66 | struct xfs_mount *mp; /* file system mount point */ | |
67 | struct xfs_buf *agbp; /* buffer for a.g. freelist header */ | |
68 | struct xfs_perag *pag; /* per-ag struct for this agno */ | |
3fbbbea3 | 69 | struct xfs_inode *ip; /* for userdata zeroing method */ |
1da177e4 LT |
70 | xfs_fsblock_t fsbno; /* file system block number */ |
71 | xfs_agnumber_t agno; /* allocation group number */ | |
72 | xfs_agblock_t agbno; /* allocation group-relative block # */ | |
73 | xfs_extlen_t minlen; /* minimum size of extent */ | |
74 | xfs_extlen_t maxlen; /* maximum size of extent */ | |
75 | xfs_extlen_t mod; /* mod value for extent size */ | |
76 | xfs_extlen_t prod; /* prod value for extent size */ | |
77 | xfs_extlen_t minleft; /* min blocks must be left after us */ | |
78 | xfs_extlen_t total; /* total blocks needed in xaction */ | |
79 | xfs_extlen_t alignment; /* align answer to multiple of this */ | |
80 | xfs_extlen_t minalignslop; /* slop for minlen+alignment calcs */ | |
bfe46d4e BF |
81 | xfs_agblock_t min_agbno; /* set an agbno range for NEAR allocs */ |
82 | xfs_agblock_t max_agbno; /* ... */ | |
1da177e4 LT |
83 | xfs_extlen_t len; /* output: actual size of extent */ |
84 | xfs_alloctype_t type; /* allocation type XFS_ALLOCTYPE_... */ | |
85 | xfs_alloctype_t otype; /* original allocation type */ | |
292378ed | 86 | int datatype; /* mask defining data type treatment */ |
1da177e4 LT |
87 | char wasdel; /* set if allocation was prev delayed */ |
88 | char wasfromfl; /* set if allocation is from freelist */ | |
d210a28c | 89 | xfs_fsblock_t firstblock; /* io first block allocated */ |
340785cc | 90 | struct xfs_owner_info oinfo; /* owner of blocks being allocated */ |
3fd129b6 | 91 | enum xfs_ag_resv_type resv; /* block reservation to use */ |
1da177e4 LT |
92 | } xfs_alloc_arg_t; |
93 | ||
94 | /* | |
292378ed | 95 | * Defines for datatype |
1da177e4 | 96 | */ |
3fbbbea3 DC |
97 | #define XFS_ALLOC_USERDATA (1 << 0)/* allocation is for user data*/ |
98 | #define XFS_ALLOC_INITIAL_USER_DATA (1 << 1)/* special case start of file */ | |
99 | #define XFS_ALLOC_USERDATA_ZERO (1 << 2)/* zero extent on allocation */ | |
292378ed DC |
100 | #define XFS_ALLOC_NOBUSY (1 << 3)/* Busy extents not allowed */ |
101 | ||
102 | static inline bool | |
103 | xfs_alloc_is_userdata(int datatype) | |
104 | { | |
105 | return (datatype & ~XFS_ALLOC_NOBUSY) != 0; | |
106 | } | |
107 | ||
108 | static inline bool | |
109 | xfs_alloc_allow_busy_reuse(int datatype) | |
110 | { | |
111 | return (datatype & XFS_ALLOC_NOBUSY) == 0; | |
112 | } | |
1da177e4 | 113 | |
52548852 DW |
114 | /* freespace limit calculations */ |
115 | #define XFS_ALLOC_AGFL_RESERVE 4 | |
116 | unsigned int xfs_alloc_set_aside(struct xfs_mount *mp); | |
117 | unsigned int xfs_alloc_ag_max_usable(struct xfs_mount *mp); | |
118 | ||
a1f69417 ES |
119 | xfs_extlen_t xfs_alloc_longest_free_extent(struct xfs_perag *pag, |
120 | xfs_extlen_t need, xfs_extlen_t reserved); | |
496817b4 | 121 | unsigned int xfs_alloc_min_freelist(struct xfs_mount *mp, |
6cc87645 | 122 | struct xfs_perag *pag); |
1da177e4 | 123 | |
1da177e4 LT |
124 | /* |
125 | * Compute and fill in value of m_ag_maxlevels. | |
126 | */ | |
127 | void | |
128 | xfs_alloc_compute_maxlevels( | |
129 | struct xfs_mount *mp); /* file system mount structure */ | |
130 | ||
131 | /* | |
132 | * Get a block from the freelist. | |
133 | * Returns with the buffer for the block gotten. | |
134 | */ | |
135 | int /* error */ | |
136 | xfs_alloc_get_freelist( | |
137 | struct xfs_trans *tp, /* transaction pointer */ | |
138 | struct xfs_buf *agbp, /* buffer containing the agf structure */ | |
92821e2b DC |
139 | xfs_agblock_t *bnop, /* block address retrieved from freelist */ |
140 | int btreeblk); /* destination is a AGF btree */ | |
1da177e4 LT |
141 | |
142 | /* | |
143 | * Log the given fields from the agf structure. | |
144 | */ | |
145 | void | |
146 | xfs_alloc_log_agf( | |
147 | struct xfs_trans *tp, /* transaction pointer */ | |
148 | struct xfs_buf *bp, /* buffer for a.g. freelist header */ | |
149 | int fields);/* mask of fields to be logged (XFS_AGF_...) */ | |
150 | ||
151 | /* | |
152 | * Interface for inode allocation to force the pag data to be initialized. | |
153 | */ | |
154 | int /* error */ | |
155 | xfs_alloc_pagf_init( | |
156 | struct xfs_mount *mp, /* file system mount structure */ | |
157 | struct xfs_trans *tp, /* transaction pointer */ | |
158 | xfs_agnumber_t agno, /* allocation group number */ | |
159 | int flags); /* XFS_ALLOC_FLAGS_... */ | |
160 | ||
161 | /* | |
162 | * Put the block on the freelist for the allocation group. | |
163 | */ | |
164 | int /* error */ | |
165 | xfs_alloc_put_freelist( | |
166 | struct xfs_trans *tp, /* transaction pointer */ | |
167 | struct xfs_buf *agbp, /* buffer for a.g. freelist header */ | |
168 | struct xfs_buf *agflbp,/* buffer for a.g. free block array */ | |
92821e2b DC |
169 | xfs_agblock_t bno, /* block being freed */ |
170 | int btreeblk); /* owner was a AGF btree */ | |
1da177e4 LT |
171 | |
172 | /* | |
173 | * Read in the allocation group header (free/alloc section). | |
174 | */ | |
175 | int /* error */ | |
176 | xfs_alloc_read_agf( | |
177 | struct xfs_mount *mp, /* mount point structure */ | |
178 | struct xfs_trans *tp, /* transaction pointer */ | |
179 | xfs_agnumber_t agno, /* allocation group number */ | |
180 | int flags, /* XFS_ALLOC_FLAG_... */ | |
181 | struct xfs_buf **bpp); /* buffer for the ag freelist header */ | |
182 | ||
183 | /* | |
184 | * Allocate an extent (variable-size). | |
185 | */ | |
186 | int /* error */ | |
187 | xfs_alloc_vextent( | |
188 | xfs_alloc_arg_t *args); /* allocation argument structure */ | |
189 | ||
190 | /* | |
191 | * Free an extent. | |
192 | */ | |
193 | int /* error */ | |
194 | xfs_free_extent( | |
340785cc DW |
195 | struct xfs_trans *tp, /* transaction pointer */ |
196 | xfs_fsblock_t bno, /* starting block number of extent */ | |
197 | xfs_extlen_t len, /* length of extent */ | |
3fd129b6 DW |
198 | struct xfs_owner_info *oinfo, /* extent owner */ |
199 | enum xfs_ag_resv_type type); /* block reservation type */ | |
1da177e4 | 200 | |
ce1d802e DW |
201 | int /* error */ |
202 | xfs_alloc_lookup_le( | |
203 | struct xfs_btree_cur *cur, /* btree cursor */ | |
204 | xfs_agblock_t bno, /* starting block of extent */ | |
205 | xfs_extlen_t len, /* length of extent */ | |
206 | int *stat); /* success/failure */ | |
207 | ||
a66d6363 DC |
208 | int /* error */ |
209 | xfs_alloc_lookup_ge( | |
210 | struct xfs_btree_cur *cur, /* btree cursor */ | |
211 | xfs_agblock_t bno, /* starting block of extent */ | |
212 | xfs_extlen_t len, /* length of extent */ | |
213 | int *stat); /* success/failure */ | |
214 | ||
a46db608 CH |
215 | int /* error */ |
216 | xfs_alloc_get_rec( | |
217 | struct xfs_btree_cur *cur, /* btree cursor */ | |
218 | xfs_agblock_t *bno, /* output: starting block of extent */ | |
219 | xfs_extlen_t *len, /* output: length of extent */ | |
220 | int *stat); /* output: success/failure */ | |
221 | ||
4fb6e8ad CH |
222 | int xfs_read_agf(struct xfs_mount *mp, struct xfs_trans *tp, |
223 | xfs_agnumber_t agno, int flags, struct xfs_buf **bpp); | |
26788097 DW |
224 | int xfs_alloc_read_agfl(struct xfs_mount *mp, struct xfs_trans *tp, |
225 | xfs_agnumber_t agno, struct xfs_buf **bpp); | |
2e9101da | 226 | int xfs_alloc_fix_freelist(struct xfs_alloc_arg *args, int flags); |
4d89e20b DC |
227 | int xfs_free_extent_fix_freelist(struct xfs_trans *tp, xfs_agnumber_t agno, |
228 | struct xfs_buf **agbp); | |
4fb6e8ad | 229 | |
8018026e DW |
230 | xfs_extlen_t xfs_prealloc_blocks(struct xfs_mount *mp); |
231 | ||
2d520bfa DW |
232 | typedef int (*xfs_alloc_query_range_fn)( |
233 | struct xfs_btree_cur *cur, | |
234 | struct xfs_alloc_rec_incore *rec, | |
235 | void *priv); | |
236 | ||
237 | int xfs_alloc_query_range(struct xfs_btree_cur *cur, | |
238 | struct xfs_alloc_rec_incore *low_rec, | |
239 | struct xfs_alloc_rec_incore *high_rec, | |
240 | xfs_alloc_query_range_fn fn, void *priv); | |
e9a2599a DW |
241 | int xfs_alloc_query_all(struct xfs_btree_cur *cur, xfs_alloc_query_range_fn fn, |
242 | void *priv); | |
21ec5416 DW |
243 | xfs_agblock_t xfs_ag_block_count(struct xfs_mount *mp, xfs_agnumber_t agno); |
244 | bool xfs_verify_agbno(struct xfs_mount *mp, xfs_agnumber_t agno, | |
245 | xfs_agblock_t agbno); | |
246 | bool xfs_verify_fsbno(struct xfs_mount *mp, xfs_fsblock_t fsbno); | |
2d520bfa | 247 | |
ce1d802e DW |
248 | int xfs_alloc_has_record(struct xfs_btree_cur *cur, xfs_agblock_t bno, |
249 | xfs_extlen_t len, bool *exist); | |
250 | ||
1da177e4 | 251 | #endif /* __XFS_ALLOC_H__ */ |