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2bd0ea18 | 1 | /* |
f302e9e4 NS |
2 | * Copyright (c) 2000-2002,2005 Silicon Graphics, Inc. |
3 | * All Rights Reserved. | |
5000d01d | 4 | * |
f302e9e4 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 | |
2bd0ea18 | 7 | * published by the Free Software Foundation. |
5000d01d | 8 | * |
f302e9e4 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. | |
5000d01d | 13 | * |
f302e9e4 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 | |
2bd0ea18 NS |
17 | */ |
18 | #ifndef __XFS_ALLOC_H__ | |
dfc130f3 | 19 | #define __XFS_ALLOC_H__ |
2bd0ea18 NS |
20 | |
21 | struct xfs_buf; | |
a2ceac1f | 22 | struct xfs_btree_cur; |
2bd0ea18 NS |
23 | struct xfs_mount; |
24 | struct xfs_perag; | |
25 | struct xfs_trans; | |
a2ceac1f DC |
26 | |
27 | extern struct workqueue_struct *xfs_alloc_wq; | |
2bd0ea18 | 28 | |
b8165508 DC |
29 | unsigned int xfs_agfl_size(struct xfs_mount *mp); |
30 | ||
2bd0ea18 | 31 | /* |
dfc130f3 | 32 | * Freespace allocation types. Argument to xfs_alloc_[v]extent. |
2bd0ea18 | 33 | */ |
56b2de80 | 34 | #define XFS_ALLOCTYPE_FIRST_AG 0x02 /* ... start at ag 0 */ |
56b2de80 DC |
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; | |
42 | ||
43 | #define XFS_ALLOC_TYPES \ | |
56b2de80 | 44 | { XFS_ALLOCTYPE_FIRST_AG, "FIRST_AG" }, \ |
56b2de80 DC |
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" } | |
2bd0ea18 NS |
49 | |
50 | /* | |
51 | * Flags for xfs_alloc_fix_freelist. | |
52 | */ | |
dfc130f3 | 53 | #define XFS_ALLOC_FLAG_TRYLOCK 0x00000001 /* use trylock for buffer locking */ |
5e656dbb | 54 | #define XFS_ALLOC_FLAG_FREEING 0x00000002 /* indicate caller is freeing extents*/ |
e365af6f 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 */ | |
2c003dc2 | 57 | #define XFS_ALLOC_FLAG_CHECK 0x00000010 /* test only, don't modify args */ |
5e656dbb | 58 | |
2bd0ea18 NS |
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 */ | |
9542ae13 | 69 | struct xfs_inode *ip; /* for userdata zeroing method */ |
2bd0ea18 NS |
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 */ | |
ff3263dd BF |
81 | xfs_agblock_t min_agbno; /* set an agbno range for NEAR allocs */ |
82 | xfs_agblock_t max_agbno; /* ... */ | |
2bd0ea18 | 83 | xfs_extlen_t len; /* output: actual size of extent */ |
dfc130f3 RC |
84 | xfs_alloctype_t type; /* allocation type XFS_ALLOCTYPE_... */ |
85 | xfs_alloctype_t otype; /* original allocation type */ | |
1fccd5c8 | 86 | int datatype; /* mask defining data type treatment */ |
2bd0ea18 NS |
87 | char wasdel; /* set if allocation was prev delayed */ |
88 | char wasfromfl; /* set if allocation is from freelist */ | |
5e656dbb | 89 | xfs_fsblock_t firstblock; /* io first block allocated */ |
85aec44f | 90 | struct xfs_owner_info oinfo; /* owner of blocks being allocated */ |
cf8ce220 | 91 | enum xfs_ag_resv_type resv; /* block reservation to use */ |
2bd0ea18 NS |
92 | } xfs_alloc_arg_t; |
93 | ||
34317449 | 94 | /* |
1fccd5c8 | 95 | * Defines for datatype |
34317449 | 96 | */ |
9542ae13 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 */ | |
1fccd5c8 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 | } | |
34317449 | 113 | |
b8a8d6e5 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 | ||
72bda06d | 119 | xfs_extlen_t xfs_alloc_longest_free_extent(struct xfs_mount *mp, |
cf8ce220 DW |
120 | struct xfs_perag *pag, xfs_extlen_t need, |
121 | xfs_extlen_t reserved); | |
de046644 DC |
122 | unsigned int xfs_alloc_min_freelist(struct xfs_mount *mp, |
123 | struct xfs_perag *pag); | |
23aab3f9 | 124 | |
2bd0ea18 NS |
125 | /* |
126 | * Compute and fill in value of m_ag_maxlevels. | |
127 | */ | |
128 | void | |
129 | xfs_alloc_compute_maxlevels( | |
130 | struct xfs_mount *mp); /* file system mount structure */ | |
131 | ||
2bd0ea18 NS |
132 | /* |
133 | * Get a block from the freelist. | |
134 | * Returns with the buffer for the block gotten. | |
135 | */ | |
136 | int /* error */ | |
137 | xfs_alloc_get_freelist( | |
138 | struct xfs_trans *tp, /* transaction pointer */ | |
139 | struct xfs_buf *agbp, /* buffer containing the agf structure */ | |
cdded3d8 DC |
140 | xfs_agblock_t *bnop, /* block address retrieved from freelist */ |
141 | int btreeblk); /* destination is a AGF btree */ | |
2bd0ea18 NS |
142 | |
143 | /* | |
144 | * Log the given fields from the agf structure. | |
145 | */ | |
146 | void | |
147 | xfs_alloc_log_agf( | |
148 | struct xfs_trans *tp, /* transaction pointer */ | |
149 | struct xfs_buf *bp, /* buffer for a.g. freelist header */ | |
150 | int fields);/* mask of fields to be logged (XFS_AGF_...) */ | |
151 | ||
152 | /* | |
153 | * Interface for inode allocation to force the pag data to be initialized. | |
154 | */ | |
155 | int /* error */ | |
156 | xfs_alloc_pagf_init( | |
157 | struct xfs_mount *mp, /* file system mount structure */ | |
158 | struct xfs_trans *tp, /* transaction pointer */ | |
159 | xfs_agnumber_t agno, /* allocation group number */ | |
dfc130f3 | 160 | int flags); /* XFS_ALLOC_FLAGS_... */ |
2bd0ea18 NS |
161 | |
162 | /* | |
163 | * Put the block on the freelist for the allocation group. | |
164 | */ | |
165 | int /* error */ | |
166 | xfs_alloc_put_freelist( | |
167 | struct xfs_trans *tp, /* transaction pointer */ | |
168 | struct xfs_buf *agbp, /* buffer for a.g. freelist header */ | |
169 | struct xfs_buf *agflbp,/* buffer for a.g. free block array */ | |
cdded3d8 DC |
170 | xfs_agblock_t bno, /* block being freed */ |
171 | int btreeblk); /* owner was a AGF btree */ | |
2bd0ea18 NS |
172 | |
173 | /* | |
174 | * Read in the allocation group header (free/alloc section). | |
175 | */ | |
176 | int /* error */ | |
177 | xfs_alloc_read_agf( | |
178 | struct xfs_mount *mp, /* mount point structure */ | |
179 | struct xfs_trans *tp, /* transaction pointer */ | |
180 | xfs_agnumber_t agno, /* allocation group number */ | |
181 | int flags, /* XFS_ALLOC_FLAG_... */ | |
182 | struct xfs_buf **bpp); /* buffer for the ag freelist header */ | |
183 | ||
184 | /* | |
185 | * Allocate an extent (variable-size). | |
186 | */ | |
187 | int /* error */ | |
188 | xfs_alloc_vextent( | |
dfc130f3 | 189 | xfs_alloc_arg_t *args); /* allocation argument structure */ |
2bd0ea18 NS |
190 | |
191 | /* | |
192 | * Free an extent. | |
193 | */ | |
194 | int /* error */ | |
195 | xfs_free_extent( | |
85aec44f DW |
196 | struct xfs_trans *tp, /* transaction pointer */ |
197 | xfs_fsblock_t bno, /* starting block number of extent */ | |
198 | xfs_extlen_t len, /* length of extent */ | |
cf8ce220 DW |
199 | struct xfs_owner_info *oinfo, /* extent owner */ |
200 | enum xfs_ag_resv_type type); /* block reservation type */ | |
2bd0ea18 | 201 | |
1fe41a73 DW |
202 | int /* error */ |
203 | xfs_alloc_lookup_le( | |
204 | struct xfs_btree_cur *cur, /* btree cursor */ | |
205 | xfs_agblock_t bno, /* starting block of extent */ | |
206 | xfs_extlen_t len, /* length of extent */ | |
207 | int *stat); /* success/failure */ | |
208 | ||
a2ceac1f DC |
209 | int /* error */ |
210 | xfs_alloc_lookup_ge( | |
211 | struct xfs_btree_cur *cur, /* btree cursor */ | |
212 | xfs_agblock_t bno, /* starting block of extent */ | |
213 | xfs_extlen_t len, /* length of extent */ | |
214 | int *stat); /* success/failure */ | |
215 | ||
216 | int /* error */ | |
217 | xfs_alloc_get_rec( | |
218 | struct xfs_btree_cur *cur, /* btree cursor */ | |
219 | xfs_agblock_t *bno, /* output: starting block of extent */ | |
220 | xfs_extlen_t *len, /* output: length of extent */ | |
221 | int *stat); /* output: success/failure */ | |
222 | ||
5a35bf2c DC |
223 | int xfs_read_agf(struct xfs_mount *mp, struct xfs_trans *tp, |
224 | xfs_agnumber_t agno, int flags, struct xfs_buf **bpp); | |
50bb67d6 DW |
225 | int xfs_alloc_read_agfl(struct xfs_mount *mp, struct xfs_trans *tp, |
226 | xfs_agnumber_t agno, struct xfs_buf **bpp); | |
e515cca1 | 227 | int xfs_alloc_fix_freelist(struct xfs_alloc_arg *args, int flags); |
2a6da3b8 DC |
228 | int xfs_free_extent_fix_freelist(struct xfs_trans *tp, xfs_agnumber_t agno, |
229 | struct xfs_buf **agbp); | |
5a35bf2c | 230 | |
ef5340cd DW |
231 | xfs_extlen_t xfs_prealloc_blocks(struct xfs_mount *mp); |
232 | ||
b3d83fa6 DW |
233 | typedef int (*xfs_alloc_query_range_fn)( |
234 | struct xfs_btree_cur *cur, | |
235 | struct xfs_alloc_rec_incore *rec, | |
236 | void *priv); | |
237 | ||
238 | int xfs_alloc_query_range(struct xfs_btree_cur *cur, | |
239 | struct xfs_alloc_rec_incore *low_rec, | |
240 | struct xfs_alloc_rec_incore *high_rec, | |
241 | xfs_alloc_query_range_fn fn, void *priv); | |
7e05e856 DW |
242 | int xfs_alloc_query_all(struct xfs_btree_cur *cur, xfs_alloc_query_range_fn fn, |
243 | void *priv); | |
9bef6258 DW |
244 | xfs_agblock_t xfs_ag_block_count(struct xfs_mount *mp, xfs_agnumber_t agno); |
245 | bool xfs_verify_agbno(struct xfs_mount *mp, xfs_agnumber_t agno, | |
246 | xfs_agblock_t agbno); | |
247 | bool xfs_verify_fsbno(struct xfs_mount *mp, xfs_fsblock_t fsbno); | |
b3d83fa6 | 248 | |
1fe41a73 DW |
249 | int xfs_alloc_has_record(struct xfs_btree_cur *cur, xfs_agblock_t bno, |
250 | xfs_extlen_t len, bool *exist); | |
251 | ||
2bd0ea18 | 252 | #endif /* __XFS_ALLOC_H__ */ |